Express JS Jobs

We are looking for an experienced backend developer to help us build a WhatsApp integration system using WhatsApp Business API with webhook-based communication. Currently, the WhatsApp Business setup is not providing a QR-based authentication, so the connection will need to be handled via webhook configuration and backend session handling. The main objective is to build a scalable backend system where each user can create and manage multiple WhatsApp instances, maintain persistent connections, and handle messaging events efficiently.

I’m building a modern, data-driven KPI dashboard that executives can open on any device and instantly understand performance trends. The front end should be crafted with clean, component-based HTML, CSS and JavaScript—React is strongly preferred for its state management and speed—while the back end can run on Node.js, PHP or Python. Data will live in either MySQL or MongoDB, whichever you are most comfortable optimizing. Functionality in scope: • Secure login with two distinct roles: an Admin who manages every data point and a Standard User who can view and interact with metrics. • A polished admin panel where the Admin imports, edits and deletes KPI records. • Rich visualisation powered by bar, line, pie and area charts. Users must be able to filter o...

My React-based appointment platform is almost ready to ship, but two stubborn issues in the scheduling logic are blocking release: • The time-slot generator sometimes shows options that should be unavailable. • When a user hits “Book,” the request hangs far longer than it should. I need a developer who can dive straight into the existing React frontend (hooks and context), trace the slot-generation flow through to the scheduling API, and deliver a clean, well-tested patch. You’ll verify that only legitimate slots appear under every timezone/working-hours scenario and profile the booking call so the confirmation returns promptly. Deliverables (acceptance criteria) 1. Updated logic that always publishes correct, conflict-free time slots. 2. Booking operat...

I am building Meet-sphere, a browser-based video calling platform geared toward friends and family. You can preview the current proof-of-concept here: The core is already in place—ReactJS on the front end, an Express/NodeJS API backed by MongoDB, and peer connections over WebRTC managed through with token-based authentication. I now want to move from demo to production quality by adding: • Screen sharing that works smoothly on Chrome, Firefox, and Safari • Multi-user conferences (3–6 participants in a room without noticeable lag) • An integrated text chat pane, delivered over the existing socket layer and persisted to MongoDB for reloads The codebase is modern React (hooks, Context, Vite), and the server runs on Express with JWT auth. You’ll have...

I’m building a new white-label iGaming suite that bundles an online casino and a full-featured sportsbook into a single, scalable platform. The project covers everything from the real-time odds engine to the front-end lobby, and I need a senior full-stack developer who can own the build end-to-end. The back end must be modular—micro-service friendly, containerised, and ready to plug in third-party game providers, odds feeds, KYC tools, and multiple payment gateways. A modern stack such as Node.js or Go for the services, TypeScript/React (or similar) for the client, and a cloud environment like AWS or GCP with Docker/Kubernetes for orchestration is preferred, but I’m open to your proven alternatives if they shorten time-to-market without sacrificing reliability. On the f...

Full Stack Web Developer | MERN Stack | UI/UX Designer Hello, I am Prashant Kumar, a passionate Full Stack Developer and Creative Designer with over 2 years of hands-on experience building modern, responsive, and high-performance web applications. I specialize in developing complete web solutions from scratch — from designing clean and attractive user interfaces to building secure backend systems and managing databases efficiently. What I Can Do For You Custom Website Development (Frontend and Backend) MERN Stack Applications (MongoDB, , React.js, Node.js) REST API Development and Integration JWT Authentication and Role-Based Access Control Admin Dashboards and Employee Management Systems E-commerce Websites Portfolio and Business Websites Database Design (MySQL and MongoD...

Buscamos un desarrollador Full-Stack (o equipo) senior para el desarrollo de las aplicaciones móviles nativas (iOS y Android) de nuestra herramienta TheCampus. El proyecto consiste en replicar la funcionalidad y lógica de nuestra plataforma web (Angular), integrándola con un backend robusto ya existente en Firebase. Stack Tecnológico Requerido (Imprescindible) iOS: SwiftUI (Arquitectura MVVM). Android: Kotlin (Jetpack Compose). Backend: Firebase Cloud Functions (Desarrolladas en Node.js con Express). Database: Firebase Firestore. Networking: Dominio de consumo de APIs REST (JSON/HTTP). Auth: Firebase Authentication (Flujo híbrido: SSO y Usuario/Contraseña). Referencia: Angular (para interpretar la lógica de negocio actual). Detalles ...

We are building a modular AI-powered WhatsApp support system integrated with our existing WooCommerce, CRM infrastructure and subscription Support. All using Whatsapp as main Seller bot. The system must include: • WhatsApp Cloud API integration • Custom middleware (Node.js or Python preferred) • Subscription validation by WhatsApp phone number • Role-based access control (Farmer, Field Technician, Repair Technician, Full Technician) • AI integration (OpenAI API) • Structured logging and audit trail • Escalation to human support • Clean architecture with separation between commercial and technical domains • Integration with Kommo or other simular. • Integration to Woocomerce • Woocommerce al functions tests: freights, Payment, Invoi...

Agwa Travel OS — MVP Development (Architecture‑First Build) Agwa Travel OS is a unified travel platform built on a modern, cloud‑ready stack: Node.js + NestJS services, React/ front end, PostgreSQL, Redis, and ElasticSearch running on AWS. The technical architecture, module boundaries, API contracts, and phased milestone plan are already fully documented. What I need now is a disciplined, architecture‑first development team that can execute cleanly and stay with the product long term. Scope of the MVP The first release focuses on delivering the complete core travel flow across multiple verticals: 1. Search → Book → Pay Users must be able to: Search flights, hotels, cars, and experiences View real‑time availability and pricing Complete booking and checkout using Stripe ...

Title: React Native Developer Needed to Upgrade Community-Based Social Media App Description: We are building a next-generation community-focused social media platform called Moxee. The backend APIs are already completed (Node.js + MongoDB). We are looking for an experienced React Native developer to implement and integrate the following frontend features: Scope of Work Professional Email Verification & Domain Community Display domain badge on verified users’ profiles. Clicking badge should show all users from that domain. API integration already completed. Notifications System Build notifications screen. Integrate with backend notifications API. Clean UI with proper state handling. User Search Page Search users dynamically. API-based search implementation. Optimi...

I am looking to build a cutting-edge online casino website featuring progressive jackpot slot games and incorporating cryptocurrency transactions. Here are my requirements: - Implement a variety of exciting and engaging slot variants with a focus on progressive jackpot slot machines. - The website should be designed to support cryptocurrency transactions, offering an innovative and secure way for users to enjoy their gaming experience. An ideal candidate should: - Have experience developing betting websites, particularly online casinos. - Show a strong understanding and knowledge of integrating cryptocurrency payments. - Be experienced in designing engaging and successful slot machine games, specifically progressive jackpot slots.