Atri B.

⭐ Top Rated Plus | $400K+ Earned | 23,000+ Hours | 100% Job Success

I help businesses modernize and scale .NET applications — turning slow, hard-to-maintain legacy systems into fast, secure, scalable platforms, without a risky full rewrite. From ASP.NET Web Forms migrations to enterprise systems running 300GB+ databases, I specialize in the complex, business-critical work most developers avoid.

Increasingly, clients bring me in for a second reason: they want AI capabilities — document intelligence, smart search, workflow automation — and their legacy system can't support them. I fix the foundation and build the AI on top.

Over 14 years, I've delivered 89+ projects on Upwork with consistent 5-star results, including a 1,300+ hour engagement with a single client who kept coming back.

What I bring to your project:

🔹 Legacy .NET Modernization — Migrating ASP.NET Web Forms & .NET Framework apps to ASP.NET Core / .NET 8, incrementally and without breaking what already works
🔹 SQL Server Performance Specialist — Complex queries, stored procedures, query optimization, and scaling databases to 300GB+
🔹 AI Integration on Legacy Systems — Production OpenAI/LLM features: document intelligence, RAG search over your business data, OCR pipelines. Built on a modernized foundation, not bolted onto a fragile one
🔹 Full-Stack .NET Depth — ASP.NET (Web Forms, MVC, Core), C#, Web API/REST, Entity Framework, LINQ
🔹 Modern Front-End — React, Angular, Vue.js, Blazor, TypeScript, Tailwind, Bootstrap
🔹 Cloud & DevOps — Azure (primary), plus AWS & GCP experience, Azure DevOps, CI/CD pipelines, Git
🔹 Integrations — Payment systems (Stripe subscription billing for a healthcare platform), third-party APIs, MongoDB, CosmosDB

Why clients rehire me:

✅ Clear, proactive communication (0–4 hour response time)
✅ Reliable availability in US time zones — I regularly work Eastern and Pacific hours
✅ Clean, maintainable, well-tested code
✅ Enterprise-standard code reviews, team leadership, and developer mentoring
✅ Solving hard problems — not just "making it work"

Not sure where to start? I offer a fixed-fee, two-week Legacy Health Audit: your slowest queries analyzed, a risk map of your codebase, a phased modernization roadmap, and an AI-readiness assessment — so you know exactly what's wrong and what it will cost to fix, before you commit to anything.

Whether you need a legacy system modernized, a SQL Server database that's buckling under load, AI features your current stack can't deliver, or a senior engineer to unblock your team — let's talk. Describe your application and I'll tell you specifically how I'd approach it. I'll respond within 4 hours.