You will get AI-powered SaaS MVP with Next.js, FastAPI, Stripe and LLM features
Top Rated
Top Rated
Project details
I build your SaaS MVP end to end and get it live, usually in a few weeks. One senior full-stack engineer handles the whole stack, so you skip the pain of coordinating a separate frontend dev, backend dev, and AI person who never talk to each other.
What you get: a Next.js frontend, a FastAPI backend, PostgreSQL, authentication, Stripe billing, dashboards, and deployment. A real, working product you can put in front of users, not a prototype that breaks the first time someone clicks the wrong thing.
Want AI in it? I add LLM features (chatbot, document Q&A with RAG, AI workflows) using Claude or OpenAI, built in properly with streaming, fallbacks, and cost control.
5+ years building production SaaS, including B2B AI platforms for clients in South Korea.
Tell me the one core workflow your product needs to nail, and I'll build the MVP around it. If it's a fit, we move fast.
What you get: a Next.js frontend, a FastAPI backend, PostgreSQL, authentication, Stripe billing, dashboards, and deployment. A real, working product you can put in front of users, not a prototype that breaks the first time someone clicks the wrong thing.
Want AI in it? I add LLM features (chatbot, document Q&A with RAG, AI workflows) using Claude or OpenAI, built in properly with streaming, fallbacks, and cost control.
5+ years building production SaaS, including B2B AI platforms for clients in South Korea.
Tell me the one core workflow your product needs to nail, and I'll build the MVP around it. If it's a fit, we move fast.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, PSD to HTML, Performance OptimizationWhat's included
| Service Tiers |
Starter
$600
|
Standard
$1,200
|
Advanced
$1,600
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 21 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 3 | 6 | 10 |
Design Customization | - | ||
Content Upload | - | - | |
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$15
Additional Page
(+ 1 Day)
+$50
Content Upload
(+ 2 Days)
+$150
2 reviews
(2)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
VS
Vishad S.
Jul 6, 2026
Full Stack Developer Needed to Build MVP Web Portal for Startup
Divyansh was a pleasure to work with. He communicated clearly throughout the project, understood the requirements quickly, and delivered exactly what was promised on time. The code was clean, well-structured, and easy to review, with attention to both quality and maintainability.
He was responsive, professional, and proactive in addressing questions, making the entire process smooth from start to finish. I'm very satisfied with the outcome and would happily work with Divyansh again. I highly recommend him to anyone looking for a reliable and skilled full stack developer.
He was responsive, professional, and proactive in addressing questions, making the entire process smooth from start to finish. I'm very satisfied with the outcome and would happily work with Divyansh again. I highly recommend him to anyone looking for a reliable and skilled full stack developer.
MA
Muhammed A.
Jul 1, 2026
Create basic Android game
Divyansh was great to work with. He refactored and ported code that others estimated would take 2 weeks in just 3 days. He provides fast, quality software.
About Divyansh
Full-Stack & Mobile App Developer | SaaS, MVP & AI | React, FastAPI
100%
Job Success
Gurugram, India - 6:43 am local time
5+ years building live SaaS products, including B2B AI platforms for enterprise clients.
Most early-stage teams burn months coordinating three contractors who don't talk to each other: a backend dev, a frontend dev, and an AI specialist, each owning a piece but nobody owning the product. I'm one senior full-stack engineer who handles the entire stack from architecture to deployment, so your MVP ships in weeks instead of quarters.
WHERE I ADD THE MOST VALUE
▸ You have a SaaS product and want to add AI features (chatbot, document processing, intelligent workflows) without breaking what already works.
▸ You're a founder who needs a full product, frontend, backend, AI integration, and deployment, built by one reliable engineer.
▸ You need LLM features that are production-hardened: streaming responses, fallback handling, cost optimization, and real error recovery.
▸ You want fast delivery without accumulating technical debt.
WHAT I BUILD
▸ Full-Stack SaaS Platforms: End-to-end SaaS development using Next.js, React, FastAPI, and Java Spring Boot. Auth (NextAuth, JWT), Stripe payments, role-based dashboards, multi-tenancy, and REST/WebSocket APIs.
▸ LLM-Powered Applications: Chat interfaces, AI assistants, document Q&A (RAG), automated workflows, and voice-enabled AI apps using OpenAI, Claude API, LangChain, and LlamaIndex. Integrated directly into your product, not bolted on as an afterthought.
▸ API Development & Third-Party Integrations: Clean RESTful APIs with FastAPI or Spring Boot. Integrations with OpenAI, Anthropic, Stripe, Twilio, Agora, ElevenLabs, Azure Cognitive Services, and more.
▸ Mobile Apps (Android & iOS): Native Android apps in Java/Kotlin and cross-platform solutions with React Native. Real-time sync, offline support, and AI-powered features built in.
▸ Database & Backend Architecture: PostgreSQL, MongoDB, Supabase, Redis. Schema design, query optimization, and backend architecture that scales as your user base grows.
▸ Cloud Deployment & DevOps: Docker, Azure, AWS, Vercel, Firebase. CI/CD pipelines, environment configuration, and production deployment, not just "it works on my machine."
RECENT PROJECTS
AI Interview Platform (Supercoder): Built a real-time AI interviewer using LLMs, voice synthesis (ElevenLabs), and Microsoft Speech-to-Text. Deployed on Azure for B2B clients in South Korea. Handles live interview sessions with automated evaluation and scoring.
Sarva Health AI (Healthcare B2B SaaS): Built an AI-powered Revenue Cycle Management platform for healthcare automating medical billing to cut claim denials, speed up reimbursements, and improve operational efficiency. Full-stack build with Next.js, FastAPI, and LLM-driven automation, deployed to production.
Tooth Fairy (Dental Video Consultation, iOS + Android): The UK's first dental video calling app, built with dentists. Patient and dentist apps on both platforms: live video consultations, appointment booking, in-app payments, and prescription requests. The hard part was keeping calls reliable on poor mobile connections and handling patient data properly for a UK healthcare product.
TECH STACK
AI / LLM: OpenAI API · Claude API · LangChain · LlamaIndex · ElevenLabs · Whisper · Azure OpenAI
Backend: FastAPI · Java Spring Boot · Node.js · REST APIs · WebSockets · JWT · OAuth2
Frontend: Next.js · React.js · TypeScript · Tailwind CSS · ShadCN · Redux
Mobile: Android (Java / Kotlin) · iOS · React Native
Database: PostgreSQL · MongoDB · Supabase · Redis · Prisma ORM
Cloud & DevOps: Azure · AWS · Vercel · Firebase · Docker · CI/CD
WHY CLIENTS WORK WITH ME AGAIN
▸ I ask the right questions before writing a single line of code
▸ I communicate clearly, no ghosting, no vague updates
▸ I flag problems early instead of hiding them until the deadline
▸ I care about your product working, not just your ticket being closed
▸ I write code that the next developer can actually read and maintain
LET'S TALK
Send me a message, or invite me to the job, and I'll respond fast, usually within the hour.
If it's a fit, we move fast.
Steps for completing your project
After purchasing the project, send requirements so Divyansh can start the project.
Delivery time starts when Divyansh receives requirements from you.
Divyansh works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement review & planning
I analyze the requirements and define the system structure and approach.
Development phase
I build the frontend and backend with required features and integrations.