You will get Full Stack Developer Next.js Node | Full Stack Web App Developer
Top Rated
Top Rated
Project details
You want one person who can own the whole app, frontend and backend, and ship it without a dozen handoffs. That is what I do.
I have shipped 12+ production apps, including a creator platform running at ~50K live users, all on the Next.js + Node stack.
WHAT YOU GET
✅ Frontend in Next.js / React / Tailwind: responsive and fast
✅ Backend APIs on Node.js / NestJS with a clean data model
✅ Auth, payments (Stripe / Razorpay) and third-party integrations
✅ Database design on PostgreSQL, MongoDB or Supabase
✅ Deployed on Vercel / AWS with monitoring
✅ One owner for the whole stack, no finger-pointing between devs
WHY ME
Top Rated Plus, 100% JSS, 2,215+ hours, 12+ production apps shipped.
This is a monthly hire, not a one-off gig. Book the Starter, walk me through your idea, and you get a clear scope and cost before any commitment.
I have shipped 12+ production apps, including a creator platform running at ~50K live users, all on the Next.js + Node stack.
WHAT YOU GET
✅ Frontend in Next.js / React / Tailwind: responsive and fast
✅ Backend APIs on Node.js / NestJS with a clean data model
✅ Auth, payments (Stripe / Razorpay) and third-party integrations
✅ Database design on PostgreSQL, MongoDB or Supabase
✅ Deployed on Vercel / AWS with monitoring
✅ One owner for the whole stack, no finger-pointing between devs
WHY ME
Top Rated Plus, 100% JSS, 2,215+ hours, 12+ production apps shipped.
This is a monthly hire, not a one-off gig. Book the Starter, walk me through your idea, and you get a clear scope and cost before any commitment.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$50
|
Standard
$2,000
|
Advanced
$3,000
|
|---|---|---|---|
| Delivery Time | 1 day | 20 days | 30 days |
Number of Revisions | 0 | 1 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Frequently asked questions
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DS
Daniel S.
Jun 30, 2026
AWS PWA Development and Deployment Expert Needed !ONLY SOLO Freelancer!
Jaykumar understands requirements fast and delivers in excellent quailty. If that would not yet the peak, he is self driving sees improvement opportunities and is 100% result driven. Thanks Jay for our exceptional contribution and perfect delivery.
EG
Eugene G.
Sep 22, 2025
Node.js Expert with 5+ years experience
Great work!!!
FM
Fuad M.
Apr 7, 2025
React Site Updates
My react project was delivered much faster than expected with higher quality than asked for.
About Jaykumar
Senior Backend Engineer | Node.js - NestJS | System Architecture
100%
Job Success
Ahmedabad, India - 12:31 pm local time
I am a Senior Backend Engineer with over 6 years of experience building, scaling, and operating production systems across Fintech, E-commerce, Enterprise ERP, and AI platforms. I specialize in turning complex business requirements into high-performance, maintainable microservice architectures.
🚀 My Expertise Includes:
- Architectural Leadership: Led a zero-downtime migration of a legacy Visual Basic ERP to a NestJS and Oracle architecture for a NASDAQ-listed US company (inventory, rentals, warehouse, logistics, barcode, real-time sync, high-speed catalog search).
- Performance Engineering: Reduced API latency by 90-92% (from around 1.5s down to 50-150ms) through database indexing, schema design, and query optimization, and cut infrastructure cost by 50%+ via database normalization and server tuning.
- High-Throughput Systems: Built background job pipelines processing 10,000+ jobs every 10 minutes and 600,000 to 700,000 jobs per hour at near-zero error rate using Laravel Horizon.
- Financial Systems: Integrated major payment gateways (Stripe, Stripe Connect, Razorpay, Actum ACH, Cosmo, NetBilling, PayPal) with subscription billing and marketplace payouts, and built backend for StockPe, a fintech platform serving 300,000+ users, ranked #2 Product of the Day on Product Hunt.
- Integration & Scaling: Integrated 3rd party services (Twilio, SendGrid, Brevo, OpenAI, Gemini) and scaled a live creator platform to roughly 50,000 concurrent users on AWS.
- AI Systems: Built the backend and multi-agent orchestration for KitchenCloud.AI, routing requests across 6 specialized sub-agents on NestJS with vector search and persistent memory.
- Infrastructure & DevOps: Docker, serverless (AWS Lambda), AWS (EC2, S3, SQS, IVS, MediaConvert), DigitalOcean, and Vercel with zero-downtime deployments and CI/CD.
🛠 Technical Stack:
- Languages: TypeScript, Node.js,JavaScript, PHP.
- Frameworks: NestJS (Expert), Express.js, Laravel.
- Databases: PostgreSQL, Oracle, MySQL, MongoDB, Redis, DragonflyDB.
- Messaging & Real-Time: Kafka, RabbitMQ, BullMQ, Laravel Horizon, Socket io, gRPC, Event-Driven Architectures.
📊 Notable Achievements:
- Reduced API latency by 90-92% (from around 1.5s to 50-150ms) through indexing, schema design, and query optimization.
- Processed 600,000 to 700,000 background jobs per hour (10,000+ every 10 minutes) at near-zero error rate.
- Cut infrastructure cost by 50%+ through database normalization and server optimization.
- Delivered a zero-downtime Visual Basic to NestJS + Oracle ERP migration for a NASDAQ-listed company.
- Built backend for a fintech serving 300,000+ users (StockPe, #2 Product of the Day on Product Hunt).
- Top Rated Plus on Upwork with 100% Job Success and 2,215+ hours billed.
I thrive in remote, high-ownership environments and care about clean, maintainable code that holds up in production and aligns with long-term business goals.
Let's build scalable backend systems that help your business grow.
Steps for completing your project
After purchasing the project, send requirements so Jaykumar can start the project.
Delivery time starts when Jaykumar receives requirements from you.
Jaykumar works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery and scope
We get on a call, I turn your idea into a clear scope and build order, then send a plan, timeline and cost.
Frontend build
Build the UI in Next.js/React with Tailwind: responsive, fast, and matching your designs or brand.