Sagar Gupta
AI Product Engineer · Full-Stack Engineer · 6+ Years
RAG · LLM Applications · AI Agents · FastAPI · Python · React · Next.js · React Native
Selected AI Work
What I built OCR and LLM extraction pipelines, FastAPI job services, RAG retrieval over document content.
Python · FastAPI · OpenAI · SQLAlchemy · PostgreSQL · Redis
What I built OpenAI-backed APIs, structured outputs, Celery pipelines, typed FastAPI endpoints.
Python · FastAPI · OpenAI APIs · Celery · Pydantic · PostgreSQL
What I built Product-integrated RAG, Sheets-to-database sync, Python backends with Alembic migrations.
Python · FastAPI · RAG · Alembic · Google Sheets
What I Build
Retrieval pipelines, vector search, and document grounding for product features that need accurate context.
Structured outputs, prompt orchestration, and production workflows on OpenAI-backed services.
Async jobs and multi-step processing for OCR, extraction, and operational automation.
FastAPI services with Pydantic, SQLAlchemy, Alembic, Redis, and PostgreSQL for durable AI backends.
Embedding LLM and RAG features into existing SaaS products and operator workflows.
Production Experience
Healthcare booking
Led a 5-person team as backend developer and tech lead. Worked with React Native/frontend engineers. Managed AWS deployments using EC2, S3 and CloudFront.
Taxi & trip booking
Built rider and driver React Native applications and Next.js admin panel. Implemented booking flows, in-app chat, commission logic and payment operations.
B2B hotel & HR
Led a 6-person team. Designed permission-based access, HR/staff management, hotel operations and multi-status task assignment. Owned backend development, deployment, code reviews and client meetings.
Real estate
Built React Native applications and website integration for property listing, investor buy-in and initial payments.
Instagram automation
Built Next.js/TypeScript dashboard. Implemented Meta webhooks and automated DMs triggered by keyword-matched Instagram comments.
Realtime multiplayer chess
Built backend and mobile application using WebSockets and Redis pub/sub. Implemented real-time gameplay synchronization.
Engineering Approach
Experience
Experience leading teams of 5–6 engineers across backend, mobile, and frontend delivery — including Medidek (5-person team) and Ays Pro (6-person team) — with ownership of architecture, code reviews, deployment, and stakeholder communication.
Built and shipped OCR pipelines, RAG systems, vector search, LLM APIs, and SaaS AI integrations using FastAPI, SQLAlchemy, Alembic, Pydantic, OpenAI APIs, Redis, PostgreSQL, Cursor, Claude Code, and MCP.
6+ years of software engineering across MERN stack, React, Next.js, React Native, Node.js, Python backends, AWS, Docker, and GitHub Actions — shipping production applications in healthcare, mobility, hospitality, real estate, and SaaS.
Tech Stack
LLM workflows · RAG · OCR pipelines · Vector search · OpenAI APIs · AI Agents · Cursor · Claude Code · MCP
Python · FastAPI · SQLAlchemy · Alembic · Pydantic · Celery · Node.js
React · Next.js · TypeScript · JavaScript
React Native
PostgreSQL · Redis · MongoDB · SQLAlchemy · Alembic
AWS · Docker · GitHub Actions
About
I am an AI Product Engineer and Full-Stack Engineer with 6+ years of software engineering experience across full-stack product delivery, Python backend development, and technical leadership.
I build production-ready AI features — RAG, LLM applications, OCR pipelines, vector search, and FastAPI services — and integrate them into real products. I also ship with React, Next.js, React Native, and the MERN stack, and lead teams of 5–6 engineers through design, implementation, and release.
I help startups and product teams build and integrate production-ready AI features.
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