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Devansh Pandey

@devanshpandey3

Backend Engineer at TCS building production AI backends with Python, Django, FastAPI, and RAG.

At Tata Consultancy Services (TCS), I build production Django REST Framework and FastAPI backends integrated with LangChain and GPT-4o mini. I engineered RAG pipelines using FAISS, document chunking, and embeddings to ground AI responses in curated knowledge bases.

I’ve designed PostgreSQL schemas and optimized queries for conversational data, and containerized services with Docker and GitHub Actions CI/CD. I also led the Angular 6 to 18 migration of the TCS Softmart platform, delivering 50% faster load times and 35% less technical debt.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer (Backend / AI Applications)

Current

Tata Consultancy Services

Feb 2025 - Present (1 year 8 months)

Built and maintained production Django REST Framework and FastAPI backends serving 100,000+ employees, with JWT/OAuth2 authentication and input validation. Engineered RAG pipelines with FAISS and LangChain, designed PostgreSQL schemas, and containerized with Docker with CI/CD via GitHub Actions.

Python Django REST Framework fastAPI Lang Chain GPT 4o Mini RAG Faiss PostgreSQL Docker GitHub Actions JWT OAuth Prompt Engineering Prompt Injection Mitigation

Frontend Developer (Angular/React)

Tata Consultancy Services

Feb 2024 - Feb 2025 (1 year)

Built Angular 18 Email Selection platform consuming Django REST APIs, reducing allocation time by 60% with 100% CSRF/JWT security compliance. Led Angular 6 to 18 migration of TCS Softmart platform, delivering 50% faster load times and 35% less technical debt.

Angular React TypeScript JavaScript Django REST Framework CSRF JWT Security Compliance