Hi, ( I am ready to sign NDA with you) (Already worked with NGO organization and can show you screenshot)
Hope you are doing great. Thank you for posting your project on Freelancer. I have gone through to your requirement and as per our understanding, you are looking to For an Expert Salesforce developer to develop a Button to be added to Salesforce Nonprofit edition.
My skills
I am a certified Dev401 certified Salesforce Developer. I have been working on for more than 7 years now and have worked on Customer Portals, Plugin development, Partner Portals, Visualforce pages, [login to view URL] Sites, Service Cloud , Sales Cloud, Data Automation, Batch, Integrations, Schedule, Email Services, Apex, and Triggers.
I have good exposure to different areas of Salesforce like Custom Objects, Custom Fields, Data Loaders, Apex Class, Triggers, Visual Force, Work Flows, SITE development, App exchange Packages, Administrations, Validations, Advanced Formula, Reports and Dashboards etc. and Admin activities in sales force like change set deployment, smart factory, snapshot.
I have done range of Development and Customization activities in SFDC and implemented different features of SF. I have good exp in designing and developing websites.
Languages- HTML5,Css3,Angular.js,React.js, PHP, .Node.js
Ping me to discuss in detail.
Thank you