You will get a production-ready SaaS backend with Django/FastAPI, React & AWS
Top Rated
Project details
Building a SaaS product is not just about writing code - it's about engineering a system that can handle growth without breaking. I build secure, scalable backends in Python (Django/FastAPI) with a React frontend, deployed on AWS.
I'm a Top Rated engineer (100% Job Success) and Founder of Yestoideas, with 5+ years shipping production systems - including a HIPAA-compliant compliance platform and AI-powered SaaS backends serving thousands of users.
What you get:
• Secure auth from day one: JWT, RBAC, and protected APIs
• Scalable architecture: PostgreSQL schemas and APIs built to handle 10k+ concurrent users
• Clean, tested, documented code you can maintain and extend
• Integrations that just work: Stripe, webhooks, Celery background jobs
• Dockerized deployment on AWS with CI/CD
Too many startups fail from technical debt and poor early architecture. My approach is different - I treat your MVP as the foundation of a company built to scale.
Send me your brief and I'll reply with a concrete architecture proposal and estimate. Let's build a backend that powers your vision.
I'm a Top Rated engineer (100% Job Success) and Founder of Yestoideas, with 5+ years shipping production systems - including a HIPAA-compliant compliance platform and AI-powered SaaS backends serving thousands of users.
What you get:
• Secure auth from day one: JWT, RBAC, and protected APIs
• Scalable architecture: PostgreSQL schemas and APIs built to handle 10k+ concurrent users
• Clean, tested, documented code you can maintain and extend
• Integrations that just work: Stripe, webhooks, Celery background jobs
• Dockerized deployment on AWS with CI/CD
Too many startups fail from technical debt and poor early architecture. My approach is different - I treat your MVP as the foundation of a company built to scale.
Send me your brief and I'll reply with a concrete architecture proposal and estimate. Let's build a backend that powers your vision.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$300
|
Standard
$1,500
|
Advanced
$3,000
|
|---|---|---|---|
| Delivery Time | 2 days | 10 days | 21 days |
Number of Revisions | 1 | 3 | Unlimited |
Design Customization | - | ||
Content Upload | - | - | |
Responsive Design | |||
Source Code |
Frequently asked questions
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DD
Djenifer D.
May 27, 2026
Python developer needed for PDF/Word document parsing and AI Q&A prototype
Papan was professional, responsive and helpful throughout the project. He helped build and test a local document AI prototype with document search, source-based answers, version comparison and retrieval improvements.
He communicated clearly, made adjustments based on feedback and was honest about the limitations. I appreciated his effort and technical skills, and I would recommend him for AI/document automation prototype work.
He communicated clearly, made adjustments based on feedback and was honest about the limitations. I appreciated his effort and technical skills, and I would recommend him for AI/document automation prototype work.
DP
Dev P.
Apr 24, 2026
Semi-Automated Job Application System Development
Papan did an excellent job on this project.
He brought strong system design thinking, clear communication, and a very practical approach to solving a complex problem. His documentation was detailed and easy to follow, and he showed a deep understanding of both the technical challenges and real-world constraints.
What stood out most was his ability to balance automation with reliability, without overengineering the solution. He identified risks early and approached them thoughtfully.
Highly recommend working with him. Thank you Papan!
He brought strong system design thinking, clear communication, and a very practical approach to solving a complex problem. His documentation was detailed and easy to follow, and he showed a deep understanding of both the technical challenges and real-world constraints.
What stood out most was his ability to balance automation with reliability, without overengineering the solution. He identified risks early and approached them thoughtfully.
Highly recommend working with him. Thank you Papan!
PM
Piyush M.
Oct 7, 2025
Hiring: Full Stack Developer Intern/Freelancer – Python, Django, Streamlit, AI
It was great working with Papan. He understood our SaaS problem, considered multiple adhoc requirements and was able to create the solution as per expectation. He prioritized the deliverables at times when it was needed the most. We would love to collaborate with Papan again in the future.
PA
Peter A.
Aug 30, 2025
30 minute consultation
Really nice guys, great service. Solved my issue within the consultation. Much appreciated
EW
Edmund W.
May 26, 2025
60 minute consultation
About Papan
AI Full-Stack Engineer | RAG - AI Agents - Django/FastAPI - React
100%
Job Success
Kolkata, India - 7:31 am local time
I build AI-powered SaaS products that run in production — not demos. If you need someone to own the full stack, from the LLM pipeline to the backend to the React frontend, that's exactly what I do.
I'm Top Rated with 100% Job Success, and I've shipped real systems: an AI document Q&A platform with source-cited answers, a HIPAA-compliant compliance app with automated audit trails, AI voice agents, and fleet-compliance software handling FMCSA/DOT rules end-to-end.
Where I create the most value
• AI & LLM products — RAG pipelines, AI agents, chatbots, and voice interfaces using OpenAI, Claude, and Gemini. Built to handle real users, with retrieval that actually returns the right answer.
• SaaS backends — Django/FastAPI APIs with secure auth, RBAC, webhooks, Celery jobs, and PostgreSQL. Architected to scale from MVP to thousands of concurrent users.
• React frontends — clean, responsive UIs with real-time streaming (SSE/WebSocket), TanStack Query, and Tailwind/Shadcn.
• Integrations & automation — Stripe, Twilio, OAuth, n8n, and ETL pipelines that just work.
How I work
Discover your goal → agree the architecture upfront (data models, API contracts — no mid-project surprises) → build with frequent demos and clean commits → hand over full docs and a system you can maintain.
Stack: Python · Django · FastAPI · Celery · Redis · PostgreSQL · React · TypeScript · Tailwind · Docker · AWS · LangChain · OpenAI/Claude APIs · Stripe · Twilio
Send me your repo, brief, or idea and I'll reply with a concrete architecture proposal and estimate — no fluff. Let's build it right.
Generative AI, LLM Integration, RAG (Retrieval-Augmented Generation), AI Agents, LangChain, LlamaIndex, Vector Databases, Prompt Engineering, OpenAI API, Python Developer, Django Expert, Backend Developer, Full Stack Developer, FastAPI, React.js, Machine Learning, NLP, Automation, PostgreSQL, Docker, AWS, SaaS Architecture.
Steps for completing your project
After purchasing the project, send requirements so Papan can start the project.
Delivery time starts when Papan receives requirements from you.
Papan works on your project following the steps below.
Revisions may occur after the delivery date.
Architecture & Database Design
I analyze your requirements to design a normalized PostgreSQL database schema and select the right AWS services (EC2, S3, RDS) for your specific needs. I will deliver a schema diagram for your approval.
Core API Development & Auth Setup
I set up the Django/Python environment and build the secure authentication system (JWT/OAuth). I then develop the core API endpoints required for your MVP's business logic.