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dp789 - Overview

Deepak Singh

Full-Stack & GenAI Engineer
Node.js • NestJS • React • Python • AWS • Azure • RAG • LLMs • Microservices

  • 🔭 Currently building: Enterprise-grade RAG & agentic AI workflows (Azure OpenAI, LangChain, Pinecone, n8n)
  • 💼 Experience: Nitor Infotech, Wednesday Solutions, TCS (~5 years)
  • 🚀 Impact: 90% API latency reduction, 40% user retention lift, 6× faster releases, 60% fraud reduction
  • 📍 Pune, India
  • 📫 Reach me: Email • LinkedIn • Portfolio • LeetCode

🔧 Tech Stack

Backend: Node.js, NestJS, Express, REST, Microservices, Redis (cache/queues), Bull, Serverless (AWS Lambda), API Security (OAuth2, JWT)
Frontend: React, Redux/MobX, TypeScript, Component Libraries, Real-time Dashboards
Cloud / DevOps: AWS (Lambda, API Gateway), Azure (OpenAI, Functions, AD), Docker, CI/CD (Azure DevOps), CloudFormation
Data: PostgreSQL, MySQL, Redis, NoSQL, Vector DB (Pinecone)
GenAI: RAG, Embeddings, Semantic Search, LangChain, Azure OpenAI, GPT-4o, Agentic AI, n8n, OCR

🧠 Featured Projects

Research Hyper Agentic Assistant

Stack: Azure OpenAI, LangChain, Pinecone, n8n, Python, Azure Functions

  • Multi-agent system (CV Screening, Transcript Analyzer, Document Processor, RAG Chatbot, Orchestrator).
  • Advanced RAG with 3072-dim embeddings, semantic search, and citation-backed answers.
  • OCR-based ingestion (tables, images) and multi-source uploads (local, SharePoint, web).
  • Impact: 75% time saved • 10× faster processing • 95% accuracy • 6 autonomous agents • delivered in 2 months.

FinTech Platform (B2B/B2C)

Stack: Node.js, AWS Lambda, API Gateway, React, PostgreSQL, CloudFormation

  • Increased transaction throughput by ~40% and reduced latency by ~15ms.
  • Role-based React dashboards improving non-technical user access by ~60%.
  • CI/CD + infra automation (CloudFormation) cutting environment setup from 2 days → ~4 hours.

Research Analytics Platform

Stack: Node.js, NestJS, Redis, React, Azure DevOps

  • Microservices with Redis caching and tuned queries, reducing backend latency by ~90% for 500+ users.
  • Enabled access to data contributing to 200+ published research papers.
  • Secure payment flows cutting fraud attempts by ~60%.

📊 Coding & Problem Solving

  • LeetCode: Dp_pk
  • Regularly solving problems focused on DSA, system design, and performance optimization.

🏆 Certifications & Highlights

  • Cleared Round 1 – TCS CodeVita Season 7 & 8