API Development is an effective way for software to communicate and interact with each other over the internet. It’s a great way for developers to expand the capabilities of a program or systems by creating interfaces and allow data to be shared between different types of technology. With an API, existing systems can connect and more advanced solutions can be made. Hiring an API Developer can enable businesses to streamline processes and enable a much faster integration of existing software solutions.

API Developers are skilled engineers specialized in creating new APIs and maintaining existing ones. They are responsible for developing and troubleshooting current APIs, designing APIs from standards-based web services, maintaining inventory and implementing authorization mechanisms. Additionally, they incorporate different technologies together to create advanced software solutions that integrate cloud systems like Amazon Web Services or MongoDB and APIs with point-and-click platforms, like WordPress or HubSpot.

Here’s some projects that our expert API Developer made real:

  • Creating advanced databases on different cloud systems
  • Linking between two cameras from a microscope
  • Interfacing with customizing Wordpress themes, Woocommerce themes and SMS services
  • Building secure back end systems to analyze different public APIs
  • Applying sophisticated authorization mechanisms
  • Creating comprehensive ecommerce websites using MERN Stack
  • Developing node APIs for exchange markets using Node.js, Web3.js, Ether.js
  • Automatically out of stocking items from supplier’s stock through an API system.

It is no surprise that good API Development is the cornerstone of many successful software solutions. Our expert API Developers are well experienced in developing suitable solutions for projects ranging from app development to SaaS applications, game development to enterprise system integrations. WithFreelancer.com, businesses can easily hire one of these skilled professionals to build their own bespoke projects that are perfectly tailored for their needs. So why not post your own project on Freelancer today and hire an expert API Developer?

A partir das avaliações de 91,405, os clientes avaliam nosso API Developers 4.9 de 5 estrelas.
Contratar API Developers

API Development is an effective way for software to communicate and interact with each other over the internet. It’s a great way for developers to expand the capabilities of a program or systems by creating interfaces and allow data to be shared between different types of technology. With an API, existing systems can connect and more advanced solutions can be made. Hiring an API Developer can enable businesses to streamline processes and enable a much faster integration of existing software solutions.

API Developers are skilled engineers specialized in creating new APIs and maintaining existing ones. They are responsible for developing and troubleshooting current APIs, designing APIs from standards-based web services, maintaining inventory and implementing authorization mechanisms. Additionally, they incorporate different technologies together to create advanced software solutions that integrate cloud systems like Amazon Web Services or MongoDB and APIs with point-and-click platforms, like WordPress or HubSpot.

Here’s some projects that our expert API Developer made real:

  • Creating advanced databases on different cloud systems
  • Linking between two cameras from a microscope
  • Interfacing with customizing Wordpress themes, Woocommerce themes and SMS services
  • Building secure back end systems to analyze different public APIs
  • Applying sophisticated authorization mechanisms
  • Creating comprehensive ecommerce websites using MERN Stack
  • Developing node APIs for exchange markets using Node.js, Web3.js, Ether.js
  • Automatically out of stocking items from supplier’s stock through an API system.

It is no surprise that good API Development is the cornerstone of many successful software solutions. Our expert API Developers are well experienced in developing suitable solutions for projects ranging from app development to SaaS applications, game development to enterprise system integrations. WithFreelancer.com, businesses can easily hire one of these skilled professionals to build their own bespoke projects that are perfectly tailored for their needs. So why not post your own project on Freelancer today and hire an expert API Developer?

A partir das avaliações de 91,405, os clientes avaliam nosso API Developers 4.9 de 5 estrelas.
Contratar API Developers

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    172 trabalhos encontrados

    lá, sou proprietário e desenvolvedor de uma plataforma de delivery de comida caseira e local, totalmente funcional, validada no mercado real e pronta para operação. Estou vendendo esta plataforma pronta para operação. O sistema foi desenvolvido sob medida, utilizando as tecnologias mais modernas do mercado, garantindo um código limpo, rápido e de fácil manutenção.

    €371 Average bid
    €371 Média
    68 ofertas

    Preciso de um desenvolvedor com experiência comprovada na API oficial do iFood. Já possuo um ERP próprio em PHP + MySQL. Preciso de acesso/configuração da API para integrar meu ERP ao iFood. Objetivos: - Enviar produtos do meu ERP para o cardápio do iFood - Atualizar preços dos produtos no iFood pelo ERP - Controlar disponibilidade/estoque dos produtos no iFood - Receber pedidos automaticamente no ERP - Obter detalhes dos itens vendidos - Atualizar status dos pedidos Importante: não preciso que desenvolva meu ERP. Preciso de alguém com experiência real na API do iFood para viabilizar acesso, credenciais, webhooks e orientação técnica.

    €115 Average bid
    €115 Média
    79 ofertas

    New Freelancer from Pakistan or India Good experience but willing to work at low budget. I’m advancing a product whose tech stack spans Node.js for the backend, React.js on the web front-end, Flutter for mobile, and MongoDB as the data store. The codebase is already structured around this stack, yet several modules remain unfinished and a few existing components need refinement. Here’s what I need from you: • Extend or refactor the Node.js API so it remains modular, secure, and fully documented with Swagger (OpenAPI). • Finish React.js screens, wiring them to the refreshed endpoints while keeping styling consistent with the current design system. • Build or polish the corresponding Flutter views so iOS and Android stay in parity with the web experience, l...

    €14 / hr Average bid
    €14 / hr Média
    49 ofertas

    I’m a group-health insurance broker who has already laid the groundwork for a browser-based proposal system with Claude. The core logic for gathering plan data and a rough UI skeleton are in place; now I’d like a skilled developer to take it the rest of the way so I can focus on clients rather than coding. Here’s what matters most to me: • Web-based only – no desktop or mobile ports right now • Automated proposal generation that pulls the plan variables I enter, formats a polished PDF/HTML proposal, and lets me tweak wording before sending • Built-in policy comparison tools so I can show side-by-side benefits, premiums, deductibles, and employer/employee cost splits at a glance The current proof-of-concept is hosted on a private repo; I’l...

    €17 / hr Average bid
    €17 / hr Média
    134 ofertas

    Logistics Company Website – Project Scope & Features A modern, responsive, and professional logistics company website built using React, Tailwind CSS, Node.js, , and MongoDB Atlas. The website will be optimized for performance, user experience, and business lead generation. Frontend Development * Modern React-based user interface * Fully responsive design for mobile, tablet, and desktop * Tailwind CSS for fast and consistent styling * Professional homepage with company overview * About Us page * Services page * Contact page * Smooth animations and interactive UI elements * Fast-loading and SEO-friendly structure * Clean navigation and user experience Shipment Cost Calculator * Interactive shipment cost estimation tool * Dynamic calculation based on shipment parameters * Inst...

    €240 Average bid
    €240 Média
    75 ofertas
    Service Provider App & Website
    6 dias left
    Verificado

    I’m building a unified platform that lets customers book services, manage their own profiles, and chat with providers from any device. I need the full package—native-quality iOS and Android apps plus a responsive web app—running off a single, well-structured backend. The must-have features are already defined: a smooth booking system, rich user profiles, and real-time in-app messaging. Each experience has to feel consistent no matter where the user signs in, so shared authentication, synced data, and push notifications are critical. Clean code, modern UI patterns, and scalable architecture matter more to me than the specific framework you choose; I’m happy with React Native, Flutter, Kotlin/Swift + React, or any comparable stack as long as it ships reliably. Deliv...

    €417 Average bid
    €417 Média
    257 ofertas
    Provider Connection Web & Apps
    6 dias left
    Verificado

    I need a complete digital platform that lets everyday users quickly connect with vetted service providers. The core of the project is a responsive website backed by native mobile apps for both iOS and Android, all running from the same secure API and database. 
Key deliverables: • Responsive website that mirrors the app experience • Native iOS app (Swift or Flutter) • Native Android app (Kotlin or Flutter) • Scalable backend with user / provider accounts, profiles, and real-time matching The timeline is flexible, so quality and a clean, maintainable codebase take priority over speed.

    €414 Average bid
    €414 Média
    200 ofertas
    Token Marketplace Website & Apps
    6 dias left
    Verificado

    I’m building a two-sided service marketplace that runs on a token economy. The platform must be available on the web and as native apps for both customers and service providers on Android and iOS. The token system is the heart of the product: users will move through the entire booking flow— browsing, ordering, confirming, and completing a service—using tokens rather than traditional cash checkout. I want the logic for purchasing, granting, spending, and tracking tokens to be airtight, auditable, and ready for future integrations with loyalty or reward programs once the business scales. Beyond the token layer, the experience should feel familiar and friction-free, with secure registration, role-based dashboards, real-time updates, and a clean in-app messaging channel. A s...

    €484 Average bid
    €484 Média
    136 ofertas

    Enterprise Asset Management (EAM) Platform Development Specification Project Vision Develop a world-class Enterprise Asset Management (EAM) ecosystem that enables organizations to manage the complete lifecycle of physical assets through a unified Windows Desktop application, synchronized in real time with high-performance mobile applications for iOS and Android. The platform should be designed using enterprise-grade architecture, modern UI/UX principles, scalable microservice-ready backend patterns, and secure APIs capable of supporting thousands of concurrent users and millions of assets. The solution should prioritize reliability, maintainability, extensibility, security, and exceptional user experience. --- Core Platform Architecture Design the system using a layered, modular arc...

    €20 / hr Average bid
    €20 / hr Média
    75 ofertas

    I need a full-stack mobile solution that streamlines daily logistics operations. The build must cover native or cross-platform apps for both Android and iOS plus a web-based admin panel. Core workflow • Real-time tracking of vehicles and loads, with map visibility for me and my team at any moment. • Inventory management so we always know what is on board, what is in the warehouse, and what has been delivered. • Route optimization that recalculates as traffic or priorities change to keep costs down and delivery times tight. User roles Drivers log in to receive turn-by-turn navigation, live task updates pushed from the back office, and an easy way to capture delivery proof (photo, signature, or scan). An Admin role controls everything from the dashboard: user man...

    €2 / hr Average bid
    €2 / hr Média
    21 ofertas

    Hiring React Native Android Developer, PHP Backend Developer & Full Stack Developer for 24x7Mart 24x7Mart is a growing grocery delivery platform connecting local stores with customers through our website and mobile application. We are looking for skilled developers to join our team on a freelance basis for long-term work. Positions Available 1. React Native Android Developer Requirements: 1–3+ years experience React Native development API Integration Push Notifications Google Maps Integration Play Store deployment experience 2. Frontend Website Developer Requirements: React.js HTML, CSS, JavaScript Bootstrap / Tailwind CSS Responsive UI Development API Integration 3. PHP Backend Developer Requirements: PHP MySQL REST API Development Database Management Payment Gateway In...

    €53 Average bid
    €53 Média
    28 ofertas

    Title: Restaurant & Bar Management Software for Maharashtra (Full Source Code & Ownership Required) I am looking for an experienced software developer to develop a Restaurant & Bar Management Software for Maharashtra-based Bars, Permit Rooms, Restaurants, Lounges, and Hotels. The software should be designed according to Maharashtra Bar & Restaurant business requirements and should support Maharashtra Excise-related stock management and reporting requirements. Core Features Required: - POS Billing System - KOT (Kitchen Order Ticket) Management - Table Management - Bar & Liquor Inventory Management - Stock Management - Purchase & Supplier Management - Customer Management - User Rights & Permissions - Reports & Analytics - Backup & Restore - Multi-user ...

    €273 Average bid
    €273 Média
    53 ofertas

    # – Campus Recruitment Ecosystem Platform ## Vision is not a job portal. It is a collaborative ecosystem connecting three key stakeholders: 1. Students 2. Training & Placement Officers (TPOs) 3. Recruiters / Companies The platform should function as a central hub where all three stakeholders can interact, communicate, share opportunities, and manage campus hiring activities. The concept can take inspiration from platforms like Superset for campus hiring workflows and for structured profile and resume creation, while introducing a unique ecosystem where Students, TPOs, and Recruiters can directly connect and collaborate. The goal is to create India's largest pooled campus recruitment network. --- # Core Concept: The Triangle Model Unlike traditional job portals, sh...

    €252 Average bid
    €252 Média
    118 ofertas

    Contract Type: Freelance / Contract Hourly About the Role: We are seeking a highly motivated and independent freelance Full-Stack Developer to lead the concurrent development of our public-facing corporate marketing website and the initial Minimum Viable Product (MVP) of our platform. As a founding generalist for our project, you will have high autonomy to build, secure, and deploy both applications. You will use a modern React and TypeScript frontend, paired with a robust Python backend (e.g., FastAPI or Django) to handle our data and application logic. What You Will Ship in the First 90 Days: First 30 Days (Setup & Architecture): Establish the codebase, complete the PostgreSQL database schema migrations, configure secure user authentication, and deploy the development environment...

    €254 Average bid
    €254 Média
    83 ofertas

    My goal is to launch a modern estate-agency website that automatically pulls every listing from my back-office software via its provided API feed. The site’s single purpose is to present each property beautifully and accurately, so visitors can browse with ease and confidence. Here is what I need delivered: • Full API integration that syncs new, updated, or removed properties in real time. • Responsive listing pages featuring high-resolution photos, embedded virtual tours, and downloadable floor plans. • Fast search and filter tools (price, location, bedrooms, etc.) to help buyers find the right home quickly. • An intuitive CMS or admin panel for non-technical edits such as changing copy, banner images, or featured properties. • SEO-friendly struct...

    €545 Average bid
    €545 Média
    328 ofertas

    We are looking for an experienced software company/developer who already has a ready-made Business SaaS Platform / CRM / Call Management / Automation System. We need an existing application (Web + Mobile App) with source code that can be converted into our own branded product. We want a complete White Label solution similar to: • Superfone • Teleforce • Zoho CRM • Odoo • Other Business Automation Platforms The final product should be under our own brand name, domain, logo and identity. We need complete ownership rights, source code, and resale rights. We want to launch and sell this product in the Indian market as our own SaaS product. ─── IMPORTANT REQUIREMENTS: We prefer vendors who already have: • Ready-made application • Existing source code &...

    €274 Average bid
    €274 Média
    83 ofertas

    Job Description:
 We’re looking for a skilled and detail-oriented QA tester based in Singapore to help us test the API functionality of our payin and payout systems. You will play a key role in validating the reliability and accuracy of our payment processes, ensuring everything runs smoothly from start to finish. Scope of Work: * Conduct end-to-end testing of API-based payin and payout transactions * Monitor and record the full transaction process, including responses and behavior at each stage * Identify and report bugs or unexpected results with clear documentation * Work closely with developers to replicate issues and verify fixes * Offer suggestions to improve testing coverage and process reliability Requirements: * Must be physically located in Singapore (for regional paymen...

    €19 Average bid
    €19 Média
    18 ofertas

    I need a compact bot that connects directly to my Kotak Neo and Upstox accounts, tracks my running profit-and-loss in real time, and enforces a strict loss cap. The moment the preset threshold is breached the bot must refuse every new order and immediately square off every open position, then remain locked until I reset it. To make that happen you’ll need to: • Wire up to both brokers’ REST/WebSocket endpoints, authenticate with the keys I provide, and stream positions tick-by-tick. • Maintain a live P/L calculation with sub-second latency and airtight error handling so a network blip doesn’t let an order slip through. • Offer a simple way—env file, YAML or lightweight GUI—for me to change the loss limit on the fly. • Log each dec...

    €54 Average bid
    €54 Média
    23 ofertas

    Saya membutuhkan seorang developer backend yang mampu merancang dan mengimplementasikan sistem pelaporan dan analitik yang solid untuk aplikasi kami. Fokus utama ada pada: • Endpoint pelaporan yang mengekstrak, mengolah, dan menyajikan data secara real-time maupun terjadwal. • Modul analitik dasar—mulai dari perhitungan metrik hingga ringkasan tren—yang mudah diperluas. • Dokumentasi teknis singkat berisi skema basis data, diagram alur data, serta panduan build & deploy sehingga tim front-end dapat terhubung tanpa hambatan. Teknologi spesifik saya serahkan kepada Anda sepanjang stack yang dipilih stabil, aman, dan mudah dipelihara (Node.js, Python, Go, atau Java sama-sama diterima). Kode perlu bersih dan terstruktur, dilengkapi komentar seperlunya. Eks...

    €18 / hr Average bid
    €18 / hr Média
    17 ofertas

    I need a small-scale Library Management System built with C# and SQL Server that targets just one user group—students. The single workflow I want implemented is book borrowing handled through an online request form. At minimum, students should be able to: • Sign in with a basic account • Search or browse the book catalogue • Submit an Online request to borrow a selected title • View a confirmation that their request has been recorded Behind the scenes the system must store all catalogue data, user accounts and borrow-request records in SQL Server. Clean, parameterised queries or stored procedures are expected so the code is safe and easy to extend later if we decide to add faculty or librarian roles. Deliverables • Complete C# source (desktop WinF...

    €17 / hr Average bid
    €17 / hr Média
    122 ofertas

    We are looking for an experienced software company/developer who already has a ready-made Business SaaS Platform / CRM / Call Management / Automation System. We need an existing application (Web + Mobile App) with source code that can be converted into our own branded product. We want a complete White Label solution similar to: • Superfone • Teleforce • Zoho CRM • Odoo • Other Business Automation Platforms The final product should be under our own brand name, domain, logo and identity. We need complete ownership rights, source code, and resale rights. We want to launch and sell this product in the Indian market as our own SaaS product. ─── IMPORTANT REQUIREMENTS: We prefer vendors who already have: • Ready-made application • Existing source code &...

    €297 Average bid
    €297 Média
    59 ofertas

    Enterprise-Grade Data Acquisition & Document Intelligence Platform Project Description: We are seeking an experienced Full-Stack Developer or Development Team to build the MVP of a large-scale document acquisition, processing, and intelligence platform. The objective is to automatically collect documents and metadata from multiple public and semi-public web sources, normalize the data into a unified structure, store documents in a central repository, and expose the information through APIs and administrative dashboards. Scope of Work: • Build scalable web crawlers and source-specific adapters. • Automate document discovery and downloading (PDF, DOC, DOCX, XLS, ZIP and other formats). • Extract and normalize metadata from multiple sources into a unified schema. &bul...

    €234 Average bid
    €234 Média
    61 ofertas

    I need a clean, lightweight MLM application whose core is a genealogy module presented as a vertical tree. The visual should load quickly, scale smoothly as a network grows, and let any logged-in user click on a node to reveal member details—no drag-and-drop, no expand/collapse toggles, just a straightforward click-to-view experience. I am not looking for a full-blown suite at this stage; commission tracking and automated notifications may be added later, but the very first milestone is the genealogy tree itself, wired to a simple member database and wrapped in an intuitive web interface. Acceptance criteria • Vertical genealogy tree renders correctly for unlimited depth • Clicking a node opens a modal or side panel with that member’s profile data • Respo...

    €242 Average bid
    €242 Média
    68 ofertas
    Flight Booking API Developer
    6 dias left
    Verificado

    Hi, I need travel API developer who can help us build flight reservation website and guide us with right tech stack. Please only apply if you have good web dev and travel web dev related knowledge. Thanks!

    €163 Average bid
    €163 Média
    179 ofertas

    Project Title: Custom ERP & CRM System for Compression Garment Manufacturing Company We are a healthcare manufacturing company specializing in custom-made medical compression garments. Our operations include doctor referrals, direct patient sales, field sales teams, in-house manufacturing, and after-sales support. Current Scale: • 25–30 orders per day • 7 sales territories • 2 managers and 6 sales representatives • In-house production team • 30+ products with 11 different measurement templates We are looking to develop a custom web and mobile-based ERP/CRM system to digitize our complete workflow. Required Modules: 1. Doctor CRM • Doctor database and profiling • Daily call reports (DCR) • Visit tracking and follow-up reminders...

    €688 Average bid
    €688 Média
    89 ofertas

    I want to build a brand-new web application from the ground up and need someone who can comfortably handle every layer of the stack. Because this is a fresh build rather than an enhancement or a quick bug-fix, I’m looking for a developer who enjoys shaping architecture, choosing the right technologies, and iterating thoughtfully. There’s no hard deadline pressing us, so we can focus on clean, maintainable code, solid test coverage, and a deployment pipeline that scales. Here’s what I have in mind: you’ll design the database schema, implement the back-end API, craft a responsive front-end, and set up CI/CD so the project moves smoothly from development to production. I’m open to your recommendations on frameworks, languages, and hosting—what matters most...

    €227 Average bid
    €227 Média
    102 ofertas

    I need a ai based developer for developing the milk subscription application in web and pwa with delivery both realtime map integrations , marketing role ,admin panel, customer panel, all customer subscriptions can be managed by the backed end team. EarlyBird Grocery & Subscription Platform – MVP Feature List User Roles Admin - Manage products - Manage customers - Manage subscriptions - Create and manage delivery areas using map boundaries - Assign Area Heads - Manage delivery staff - View operational reports - Manage customer requests - Manage settings and notifications Marketing Executive - Add new customers - Manage leads and follow-ups - Convert leads to active customers - Create and modify subscriptions - Submit customer change requests - View assigned customers and pe...

    €152 Average bid
    €152 Média
    63 ofertas
    Report PDF Generation Service
    6 dias left
    Verificado

    This is a request to build a standalone PDF generation microservice that converts structured vehicle report JSON data into a professionally designed, print-ready A4 PDF. The system should be independent from the main application and expose an API endpoint for integration. It must: - Use Node.js/TypeScript backend - Generate PDFs using HTML to PDF rendering (Playwright or Puppeteer) - Produce fully searchable text-based PDFs (not image-based rendering) - Support branded, dealer-style report design with structured sections - Handle complex layouts such as tables, history logs, and risk summaries - Ensure correct pagination with no overlapping or broken components - Include SVG-based damage visualization support - Provide a secure API endpoint for JSON input and PDF output - Be packaged with...

    €58 Average bid
    €58 Média
    119 ofertas
    React Vehicle Report PDF Service
    6 dias left
    Verificado

    I need a developer to build a standalone professional PDF generator for a vehicle history report website. The website is built in Base44/React, but I do not want to give direct access to the Base44 project. I will provide sample JSON report data, screenshots of the online report, the current PDF output, theme colours, and SVG assets. The job is to build a separate PDF generation service/template that accepts vehicle report JSON data and returns a polished A4 PDF. Requirements: * Build as a standalone Node.js / TypeScript service * Prefer Playwright or Puppeteer for HTML-to-PDF generation * Do not use a screenshot-based html2canvas/jsPDF approach * Output should be a proper PDF with selectable/searchable text where possible * Clean A4 layout with proper page breaks * Professional dealer...

    €190 Average bid
    €190 Média
    255 ofertas

    Need an experienced developer to fix a few issues on an existing React, , and Node.js website. Tasks include bug fixing, troubleshooting, and ensuring everything works properly.

    €427 Average bid
    €427 Média
    382 ofertas
    Mobile App AI Companion Setup
    6 dias left
    Verificado

    I need an experienced developer to set up a custom API for an AI companion integrated into a mobile app. The primary functionality will be a chatbot for user interactions. Key requirements: - Integrate with a mobile app - Set up a chatbot for user interactions - Custom API development - Experience with AI engines (Dialogflow, IBM Watson, Microsoft Bot Framework preferred) Ideal Skills: - Mobile app development - API development and integration - Experience with AI chatbots - Strong programming skills in relevant languages

    €708 Average bid
    €708 Média
    125 ofertas

    We need to develop a web-based MVP (Minimum Viable Product) to generate a Health Technical Note for contracts in Colombia, following Decree 441 of 2022. The goal is to build a practical, scalable, and business-focused solution. It should help technical teams (EPS/IPS) to create, adjust, negotiate, and finalize a technical note mainly based on: RIPS data processing Population analysis Frequency and severity calculation Technical adjustments with tracking (traceability) Scenario generation Final PDF generation Monitoring and follow-up Important: This project is NOT about building a complete system from the start. We need a functional, easy-to-use, and market-ready MVP, with a structure that can be improved and expanded in the future. More details are provided in the attached PDFs.

    €185 Average bid
    €185 Média
    80 ofertas

    # Full-Stack Website Audit, CMS Development, Security Hardening & Production Deployment ## Project Overview I am looking for an experienced full-stack developer (or small team) to audit, improve, secure, and modernize an existing production website and supporting infrastructure. This is **not a greenfield project**. An existing application, database, content, media assets, and deployment environment are already in place. The goal is to preserve existing functionality and content while improving maintainability, security, administration, deployment, and long-term scalability. The current technology stack includes: * * React * TypeScript * Node.js * PostgreSQL * Docker * Nginx * Linux VPS Equivalent technologies may be proposed if justified. --- ## Existing System The current ...

    €464 Average bid
    €464 Média
    373 ofertas

    We are looking for a Junior Software Engineer (based in the United States) to collaborate with our growing engineering team on real-world production systems and AI-driven applications. About the Role You will work closely with senior engineers and product builders to design, develop, and maintain backend and frontend systems. This role is ideal for someone early in their career who wants hands-on experience in a fast-moving, collaborative environment. Responsibilities Assist in building and maintaining web applications and backend services Collaborate with engineers on feature development and bug fixing Work with APIs, integrations, and cloud-based systems Participate in code reviews and team discussions Help improve system performance, reliability, and scalability Requirements Based i...

    €1073 Average bid
    €1073 Média
    140 ofertas

    I’m ready to turn my rental-focused fintech concept into a working MVP and need someone who can own the backend while still being comfortable wiring up a straightforward front-end flow. The heart of the product is rock-solid data security, well-structured RESTful APIs, and a friction-free user journey that proves the core value quickly. The build centres on: • Secure data handling from day one, following best practices for encryption at rest and in transit. • Clean, well-documented APIs that make future integrations painless. • A simple but polished React/Next (or comparable) interface that lets users complete the key flow without confusion. Because we operate in India’s financial ecosystem, two integrations matter immediately: Account Aggregator (for bank-...

    €79 Average bid
    €79 Média
    38 ofertas

    DrChrono Analytics Pipeline and KPI Dashboard — Continuation of Existing AWS Project I own a mental health practice in New York with 9 providers and 1,200+ weekly patient visits operating on a fully telehealth model. I'm building a KPI dashboard that pulls data from DrChrono into AWS and displays in Tableau Desktop. The goal is a clean, well-documented analytics infrastructure built for long term operational visibility and future business growth. This is a continuation project. The initial AWS foundation has been set up and I need an experienced developer to complete the remaining work. What's already in place The AWS account is configured with the HIPAA BAA accepted. A PostgreSQL database is live on RDS in us-east-2. The DrChrono API connection is established and working...

    €19 / hr Average bid
    €19 / hr Média
    55 ofertas

    Title: Research and Design of Automated Trading Strategies (Stocks, ETFs, Forex, Crypto, Sports Betting Exchanges) I am looking for experienced quantitative traders, algorithmic traders, data scientists, betting exchange traders, and trading system developers. This project is NOT initially for coding a trading bot. The first phase is a paid research and strategy review project. I want proposals covering any of the following: • Stock market trading systems • ETF trading systems • Forex trading systems • Cryptocurrency trading systems • Futures trading systems • Options trading systems • Sports betting exchange systems (Betfair API preferred) For each strategy, please provide: 1. Strategy description 2. Markets traded 3. Timeframe (scalping, intraday...

    €234 Average bid
    €234 Média
    26 ofertas
    Field Service CRM AI Platform
    5 dias left
    Verificado

    I’m planning to roll out an end-to-end platform that merges field service management, full-featured CRM capabilities, mobile workforce support and an AI layer into a single, cloud-based solution. The goal is to give my technicians, office staff and customers one seamless workspace—accessible through native mobile apps as well as the web—while AI silently optimises routes, predicts parts needs and surfaces customer insights. Your work will start with a technical discovery phase so we can decide whether to customise an existing SaaS product or architect something from the ground up. From there I’ll need UI/UX wireframes, the data model, API mapping for future integrations, and clear milestones for development, QA and launch. Deliverables • Solution archit...

    €3350 Average bid
    €3350 Média
    131 ofertas

    I need an individual who can commit full-time, on an hourly basis, to keep several Node.js projects moving forward. You’ll split your time across three codebases: a browser-focused web app, a companion mobile app served through React Native, and a stand-alone REST/GraphQL API. Your main responsibilities are straightforward yet critical to the business: ship brand-new features, track down and fix bugs as they appear, and continually tune the runtime for speed and stability. I work primarily with plain Node, but if , or any other framework helps you deliver faster, you’re free to bring it into the stack—clean, maintainable code is the only non-negotiable. We’ll collaborate through GitHub, code reviews, and short daily check-ins. I release to production every Frid...

    €3 / hr Average bid
    €3 / hr Média
    45 ofertas

    I want a complete online grocery platform—customer-facing website plus native apps for both iOS and Android—modelled on the smooth, no-frills experience shoppers get. At the front end, the user must be able to browse an always-searchable product catalogue, read or leave ratings and reviews, and check out through a fully secure payment gateway. Behind the scenes I need an admin portal that lets my team handle customer data, track and adjust stock levels in real time, and process or monitor every order from placement through delivery. Automatic low-stock alerts, simple CSV imports/exports, and role-based access for staff are important so daily operations stay quick and error-free. I am open to the tech stack as long as it delivers a fast, responsive UI and a well-documented API...

    €479 Average bid
    €479 Média
    81 ofertas

    We will assist you in preparing a well-structured and complete project brief. Providing detailed information will help us better understand your needs and deliver a solution that matches your expectations. I have developed a sample e-commerce website that can be fully customized according to your preferences. It may also be adapted based on the type of website you intend to purchase or commission. You may view the sample project here:

    €16 / hr Average bid
    €16 / hr Média
    137 ofertas

    We will share the app blueprint. This is an auto generated text: I'm looking for a skilled developer to create a comprehensive system that integrates Point of Sale (POS) functionalities for my optical retail clinic and B2B marketplace capabilities. Key requirements include: POS System Features: - Inventory Management: Track stock levels, manage suppliers, and automate reordering. - Sales Reporting: Generate detailed sales reports to analyze performance. - Customer Relationship Management (CRM): Manage customer data, track interactions, and enhance customer service. B2B Marketplace Features: - Product Listings: Allow vendors to list their products. - Order Processing: Streamline order management from placement to fulfillment. Ideal skills and experience: - Proficiency in developi...

    €465 Average bid
    €465 Média
    41 ofertas

    Tôi cần bạn cấu hình và triển khai ComfyUI để chạy trực tiếp trên nền tảng Web. Hệ thống phải được viết bằng Python, từ phần backend điều khiển mô hình cho đến các API hỗ trợ giao diện. Phạm vi công việc • Cài đặt và tối ưu ComfyUI để có thể khởi chạy qua trình duyệt. • Xây dựng cơ chế Đăng nhập người dùng (token-based hoặc session an toàn). • Tạo chức năng Tải lên dữ liệu, cho phép người dùng gửi tệp lên server và chuyển tiếp vào ComfyUI để xử lý. • Trả về kết quả theo định dạng JSON hoặc HTML đơn giản; phần Báo cáo kết quả có thể phát triển thêm về sau. • Hướng dẫn c&agrav...

    €6 / hr Average bid
    €6 / hr Média
    27 ofertas

    I have a running web application AI-Powered Hiring Platform I want to add some more module into this existing app, on regular basis, so I need a parmanet degveoper who can join me to work daily 3-4 hours for long term. Existing App Screens: 1. Dashboard () Purpose: Provides a high-level overview of the user's recruitment metrics. Key Data Displayed: Total Jobs: 1 Active Jobs, Candidates, Processing: All show 0. Recent Jobs List: Displays a job titled "1099 Speech-Language Pathologist" created on 4/24/2026. 2. Jobs Management () Purpose: A tabular directory used to track, edit, view, or delete open positions. Key Data Displayed: The top metric blocks show 1 Total Job and 0 Active. 3. Create New Job ()Purpose: A 3-step creation wizard (1. Import JD $rightarrow$ ...

    €2 / hr Average bid
    €2 / hr Média
    40 ofertas

    I run a custom-built ERP that drives our manufacturing and inventory workflows. To keep pace with day-to-day operations, I now need three things rolled out together: 1. WhatsApp Business API Integration The ERP system shall be integrated with WhatsApp Business API to automate Sales Orders and Purchase Orders. Customers will be able to place orders directly through WhatsApp by selecting products, entering quantities, uploading reference photos, and providing delivery details. The system will automatically generate Sales Orders/Purchase Orders, send order confirmations, and store all order information in the ERP database. Every incoming and outgoing WhatsApp message, media file, order update, and customer interaction shall be logged and tracked within the ERP system for future reference an...

    €70 Average bid
    €70 Média
    53 ofertas

    I’m launching a brand-new true-wireless-stereo product and need its entire firmware built from the ground up, with a clear focus on Internet and cloud connectivity rather than the usual Bluetooth-only stack. Your code should let each earbud authenticate, provision itself securely, and exchange data with our cloud services for features such as usage analytics, OTA updates, and companion-app integration. To make sure we’re aligned, send me a detailed project proposal that explains: • the toolchain, SDKs, and connectivity libraries you plan to use (e.g. FreeRTOS, Zephyr, AWS IoT, Azure IoT, etc.) • how you will architect the cloud handshake while still maintaining low power draw expected of TWS hardware • a milestone schedule from bootloader bring-up to final...

    €486 Average bid
    €486 Média
    21 ofertas

    I want to build a brand-new web application from the ground up and need someone who can comfortably handle every layer of the stack. Because this is a fresh build rather than an enhancement or a quick bug-fix, I’m looking for a developer who enjoys shaping architecture, choosing the right technologies, and iterating thoughtfully. There’s no hard deadline pressing us, so we can focus on clean, maintainable code, solid test coverage, and a deployment pipeline that scales. Here’s what I have in mind: you’ll design the database schema, implement the back-end API, craft a responsive front-end, and set up CI/CD so the project moves smoothly from development to production. I’m open to your recommendations on frameworks, languages, and hosting—what matters most...

    €10 / hr Average bid
    €10 / hr Média
    254 ofertas

    I want to build a dedicated platform that tracks every aspect of competitive basketball in real time. The core of the system is live game coverage with precise player-movement tracking, immediate plays identified, and event logging that feeds straight into season-long player statistics and team dashboards. Beyond the in-game view, the platform should maintain full team management functionality—rosters, longe ups, schedules, and historical results—so coaches and staff can follow progress at a glance. I also need an automatically generated scouting module that flags standout performances during a game and aggregates clips or data that recruiters can review later. Key deliverables • Real-time engine for player-movement tracking and score updates • Integrated stats ...

    €408 Average bid
    €408 Média
    158 ofertas

    We are building Book With AI, an AI-native travel intelligence platform designed to transform flight search and travel planning through conversational AI, real-time travel intelligence, and proprietary travel logic. Phase 1 is already under development and includes flight search integrations, conversational AI, trip management, user memory, and travel intelligence services. We are now entering Phase 2, where the platform will evolve into a production-grade AI travel operating system capable of: Understanding complex travel conversations Maintaining long conversational memory Handling multi-city itineraries Applying airline and ticketing logic Providing intelligent flight and travel recommendations Integrating multiple travel APIs in real time Supporting advanced travel planning workflow...

    €1014 Average bid
    €1014 Média
    53 ofertas
    Custom Odds Sportsbook Dashboard
    5 dias left
    Verificado

    I need a full-stack web application that lets my users build their own wagers in one place, then push those exact bets straight to DraftKings and FanDuel. The flow I have in mind is simple for the bettor but technically involved behind the scenes, so I’m looking for someone who already understands sportsbook APIs, web scraping, or compliant browser automation. Core user experience • Users log in, connect their DraftKings and/or FanDuel accounts (OAuth or secure credential vault—whatever the platforms allow). • On the dashboard they see football, basketball and baseball markets first, with the architecture flexible enough to bolt on additional sports later. • For every market the user drags sliders to set custom odds, spreads or player-prop lines. As the va...

    €58 Average bid
    €58 Média
    52 ofertas

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