You will get Full Stack SaaS Web App | React, Next.js, Node.js & AI | Production-Ready
Top Rated
Top Rated
Project details
44 projects. 100% Job Success. Top Rated Plus. 6,000+ hours on Upwork.
I build SaaS platforms and web apps that work in production - not demos that break when real users show up.
[WHAT YOU GET]
• React or Next.js frontend (responsive, fast, TypeScript)
• Node.js or Python backend (APIs, auth, business logic)
• Database (PostgreSQL, Supabase, or MongoDB)
• User management, dashboards, billing, analytics
• Authentication and role-based access
• Deployment with CI/CD (Vercel, AWS)
• Clean, documented source code
[RECENT WORK]
Built ResearchCollab.ai - a full-stack AI research platform integrating OpenAI, Gemini, DeepSeek, and Perplexity. Solo build: Next.js, Python, PostgreSQL.
[BEST FOR]
• Startups building their first SaaS product
• Businesses replacing spreadsheets with a custom web app
• Founders scaling an MVP into a full platform
• Teams needing one senior dev who takes full ownership
Clean code. No spaghetti. No tech debt.
Starting price covers a focused app (3-5 pages). Larger platforms - message me with your requirements.
I build SaaS platforms and web apps that work in production - not demos that break when real users show up.
[WHAT YOU GET]
• React or Next.js frontend (responsive, fast, TypeScript)
• Node.js or Python backend (APIs, auth, business logic)
• Database (PostgreSQL, Supabase, or MongoDB)
• User management, dashboards, billing, analytics
• Authentication and role-based access
• Deployment with CI/CD (Vercel, AWS)
• Clean, documented source code
[RECENT WORK]
Built ResearchCollab.ai - a full-stack AI research platform integrating OpenAI, Gemini, DeepSeek, and Perplexity. Solo build: Next.js, Python, PostgreSQL.
[BEST FOR]
• Startups building their first SaaS product
• Businesses replacing spreadsheets with a custom web app
• Founders scaling an MVP into a full platform
• Teams needing one senior dev who takes full ownership
Clean code. No spaghetti. No tech debt.
Starting price covers a focused app (3-5 pages). Larger platforms - message me with your requirements.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$999
|
Standard
$1,400
|
Advanced
$2,500
|
|---|---|---|---|
| Delivery Time | 7 days | 15 days | 25 days |
Number of Revisions | 2 | 3 | 8 |
Number of Pages | 5 | 8 | 12 |
Design Customization | - | ||
Content Upload | - | ||
Responsive Design | |||
Source Code |
Frequently asked questions
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MK
Mohammed K.
Jul 30, 2026
Full-stack Development - React with Python and FastAPI
MK
Mohammed K.
Jul 30, 2026
Full-stack Development - React with Python and FastAPI
MK
Mohammed K.
Jun 27, 2026
Full-Stack Developer Needed (React + Vite / Python FastAPI)
JF
Juan Carlos F.
Feb 13, 2026
Full stack developer
A very professional, high-quality job. I’m very happy with the service.
MM
Mark M.
Jul 17, 2025
Front End Developer Code Design System Components
Rashvin did a great job will work wiht him again and recommend him to anyone.
About Rashvin
Full Stack React & Next.js Developer | AI Integration | SaaS & Web App
100%
Job Success
Surat, India - 12:28 am local time
I build production web applications and AI-powered platforms that real businesses depend on. Not landing pages. Not prototypes. Products that handle users, process data, and scale.
[RECENT PROJECT]
ResearchCollab.ai - I designed and built the full-stack architecture for an AI-powered research platform used by PhD students, journalists, and researchers. Integrated OpenAI, Gemini, DeepSeek, and Perplexity to power intelligent research workflows. Solo full-stack build: Next.js frontend, Python backend, PostgreSQL database.
[WHAT I BUILD]
▪ SaaS Platforms - dashboards, billing, user management, analytics
▪ AI-Powered Products - LLM integration, chatbots, AI workflows, RAG pipelines
▪ Web Applications - responsive, fast, production-grade React and Next.js apps
▪ Telehealth & Healthcare Platforms - HIPAA-aware, WebRTC, real-time video
▪ API & Backend Systems - Node.js, Python, FastAPI, REST, authentication
[MY STACK]
React | Next.js | TypeScript | Node.js | Python | FastAPI | PostgreSQL | Supabase | MongoDB | Firebase | Tailwind CSS | REST APIs | OpenAI | Gemini | LLM Integration
[HOW I WORK]
I take full ownership. I don't wait for instructions - I understand your goals, flag risks early, ship clean code, and communicate at every step. Git, CI/CD, code reviews, agile. Comfortable working solo or embedded in your team.
[BEST FIT FOR]
▪ Startups building or scaling a web product
▪ Companies adding AI features to existing applications
▪ Agencies needing a senior full-stack dev for client projects
▪ Teams who want one reliable developer instead of managing three
Currently available for long-term engagements. Send me your project details or a quick description of what you need - I'll respond with honest feedback on the best approach.
Full Stack Developer, React Developer, Next.js Developer, Node.js Developer, Python Developer, TypeScript, AI Web App, LLM Integration, ChatGPT Integration, SaaS Developer, FastAPI, PostgreSQL, Supabase, MongoDB, MERN Stack, Tailwind CSS, Frontend Developer, Backend Developer, Web Application, REST API Developer, AI Integration, Gemini API, Full Stack Web Development
Steps for completing your project
After purchasing the project, send requirements so Rashvin can start the project.
Delivery time starts when Rashvin receives requirements from you.
Rashvin works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery- We Define What to Build & Why
We discuss your goals, users, features, and priorities. I flag risks early and help you avoid building the wrong thing. You get a scope document with milestones before any code is written. No guesswork.
Architecture & Tech Planning - The Right Foundation
I plan the database schema, API structure, auth flow, and deployment strategy. Bad architecture means painful rewrites later. I design for scale from day one so your product grows without breaking.