Senior.NET + React Developer (Part-Time, Long-Term, US-Based Only — No Agencies)
We are a SaaS company in the Immigration Law industry beginning a full migration of our Azure-hosted.NET + Bootstrap platform to.NET + React. This is a part-time, long-term role for all of 2026. Strict Requirements (Must Meet ALL — No Exceptions)US-based freelancer only (no agencies, no international applicants). Top Rated / Top Rated Plus / Expert-Vetted ONLY. 4,000+ Upwork hours (not 2,000). 10+ years of professional programming experience. Must have prior, verifiable experience migrating software to.NET + React.You must include details of this experience in your application. Applications without this information will not be reviewed. Available Mon–Friday, 3–4 hours/day, with collaboration time between 9 AM–12 PM EST. Must use Upwork time tracker, Asana, and Slack for daily communication and task updates. Strong experience with:.NET (C#), Azure App Services, Azure SQL, Azure FunctionsReact and modern component-based architectureMigrating legacy UI (Bootstrap/jQuery/.NET views) to ReactAzure AI services (preferred)If you do not meet all the requirements above, please do not apply.Role OverviewMigrate an existing SaaS platform to a modern React +.NET architecture. Modernize UI/UX and refactor legacy modules. Enhance APIs, Azure Functions, and backend services to support the new front end. Work closely with our internal team across 2026. To ApplyYour proposal must include:Confirmation you meet all requirements. Specific examples of prior.NET + React migration projects you personally led or contributed to. Your availability schedule for 2026. Applications missing any of the above will not be considered.Apply tot his job