You will get Full-Stack SaaS Developer | Next.js, .NET Core, AI (OpenAI/Claude) APIs
Top Rated
Top Rated
Project details
Hey there,
Need a SaaS product built or scaled — with real AI features, not bolted-on gimmicks? That's exactly what I do.
I build production-grade full-stack applications end to end: fast Next.js frontends, robust .NET Core / NestJS backends, PostgreSQL data layers, and AWS deployment that actually holds up under load.
Where I stand out: shipping AI-powered features that work in production — GPT-4o and Claude integrations, real-time updates via SignalR, streaming responses, and latency-optimized architectures that keep the UX snappy.
Recent work:
• Happinest: AI-powered event/vendor management SaaS (Next.js, .NET Core microservices, GPT-4o, PostgreSQL, AWS)
• PlayCircle: Social matchmaking platform (.NET 9 microservices, PostGIS, SignalR, real-time messaging)
• Healthcare analytics platforms with RBAC and compliance-aligned architecture
What you get:
• Clean, maintainable code you can build on
• Clear communication and predictable delivery
• Someone who thinks about your product, not just the ticket
5+ years, full-stack, AI-native. Let's build something that ships.
What are you working on? Tell me about the product and I'll map out how I'd approach it.
Need a SaaS product built or scaled — with real AI features, not bolted-on gimmicks? That's exactly what I do.
I build production-grade full-stack applications end to end: fast Next.js frontends, robust .NET Core / NestJS backends, PostgreSQL data layers, and AWS deployment that actually holds up under load.
Where I stand out: shipping AI-powered features that work in production — GPT-4o and Claude integrations, real-time updates via SignalR, streaming responses, and latency-optimized architectures that keep the UX snappy.
Recent work:
• Happinest: AI-powered event/vendor management SaaS (Next.js, .NET Core microservices, GPT-4o, PostgreSQL, AWS)
• PlayCircle: Social matchmaking platform (.NET 9 microservices, PostGIS, SignalR, real-time messaging)
• Healthcare analytics platforms with RBAC and compliance-aligned architecture
What you get:
• Clean, maintainable code you can build on
• Clear communication and predictable delivery
• Someone who thinks about your product, not just the ticket
5+ years, full-stack, AI-native. Let's build something that ships.
What are you working on? Tell me about the product and I'll map out how I'd approach it.
Programming Languages
Python, ASP.NET, TypeScriptCoding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$100
|
Standard
$700
|
Advanced
$2,500
|
|---|---|---|---|
| Delivery Time | 2 days | 15 days | 30 days |
Number of Revisions | 2 | 7 | Unlimited |
Design Customization | |||
Content Upload | - | ||
Responsive Design | - | ||
Source Code | - | - |
13 reviews
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MN
Muhammad N.
Jul 2, 2026
React App Is Slow & Crashing Under Load — Need Performance Fix & Stabilization
Usama diagnosed and fixed the performance problems in our React app that had been slowing us down for months. Page loads went from 5–8 seconds down to under 2, the dashboard freezing on large lists is completely gone, and the random production crashes have stopped. What stood out most was that he actually found the root causes instead of applying band-aids — and he documented everything so our team understands what was wrong. Communication was clear and jargon-free, updates were consistent, and he delivered on time. We've already started him on new features. Highly recommend.
RB
Rasoola B.
Jun 27, 2026
Full-Stack Developer for AI-Integrated Web App
Usama did excellent work on our AI-integrated web app. Built a clean React/Next.js front-end and a solid Node back-end, and handled the OpenAI and Claude integration smoothly. Communication was clear and consistent, deadlines were met, and the quality was high throughout. Highly recommend - would hire again.
FD
Fuad D.
Jun 21, 2026
Behavioral Analytics Platform (Long-Term)
Usama Over achieved on this project, I was not expecting the quick work and that level of quality, I've been impressed. This is a data Ops, Dev ops work, that require several deep dive search and troubleshooting.
AI
Asad I.
May 13, 2026
Full Stack Developer AI Integration, RAG Systems & SaaS
Usama Bin Nadeem, was a pleasure to work with. He listened to all my concerns and answered all my questions in a timely manner. His knowledge and expertise was extraordinary. His AI Integrations and AI Development skills impressed me really. He completed the project on time and met all my expectations. I would use him again and would recommend him to anyone.
AS
Ahmad S.
May 6, 2026
Full-Stack Developer for Healthcare System
Usama is an excellent developer. Highly professional, punctual and detail oriented. Highly recommended. We will work again in the future for sure. Thank you Usama!
About Usama Bin
AI App & Integration Specialist | Next.js | Angular | .NET | Node Js
100%
Job Success
Gujranwala, Pakistan - 12:54 am local time
I'm a Top Rated full-stack developer (100% Job Success) who builds AI-powered web apps with Next.js, .NET Core, and the OpenAI / Claude APIs — frontend, backend, AI integration, and deployment, all handled by one person.
Recent clients hired me to:
✦ Integrate OpenAI + Claude into a live web app (React/Next.js front, Node back)
✦ Build a .NET 8 + Next.js platform from concept to production deployment
✦ Add RAG systems and AI features to an existing SaaS
✦ Fix a slow, crashing React app — cut page loads from 5–8s to under 2s
━━━━━━━━━━━━━━━━━━━━
🧠 AI & AUTOMATION
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✦ OpenAI & Anthropic (Claude) APIs — structured outputs, function calling, streaming
✦ RAG systems, AI assistants, smart search & recommendations
✦ Multi-step AI pipelines & prompt engineering
✦ Real-time AI features with SignalR live progress
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⚙️ FULL-STACK
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✦ Frontend: Next.js 15, React, Angular, TypeScript
✦ Backend: .NET Core / ASP.NET, Node.js (NestJS), REST APIs, SignalR
✦ Database: PostgreSQL, Entity Framework, query optimization
✦ Cloud: AWS (EC2, S3, Lambda), Azure, CI/CD
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💬 WHY CLIENTS KEEP HIRING ME
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→ Production AI shipped, not experiments — my reviews show it
→ I turn vague AI ideas into reliable, working products
→ Clean code, clear communication, fast turnaround
→ 100% Job Success, Top Rated, responds within a few hours
📩 Message me with what you're building — I'll tell you honestly if I'm the right fit.
Steps for completing your project
After purchasing the project, send requirements so Usama Bin can start the project.
Delivery time starts when Usama Bin receives requirements from you.
Usama Bin works on your project following the steps below.
Revisions may occur after the delivery date.
Get Requirements
in this step requirements will collect
Code
After collecting requirements i'll design the code