Santosh Kumar, Lead Backend Engineer

Hello 👋, I'm

Santosh Kumar

Lead Backend Engineer · Python, Django & AI Systems

Building resilient backend systems and production-grade AI — from RAG pipelines to fintech platforms serving real users.

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About Me

Santosh Kumar — Lead Backend Engineer headshot

Lead Backend Engineer with 5+ years designing and scaling Python systems across fintech and AI-driven EdTech. I build with Django, FastAPI, and production-grade AI — RAG pipelines, agentic workflows, and LLM-powered automation — engineered for real traffic, not demos. At Neuro-Bridge Tech I've shipped Chanakya Learning (AI-graded exams with real-time OCR feedback) and Chanakya AI (a 12+ language agentic assistant), while leading a monolith-to-microservices migration that lifted uptime to 99.9%.

5+ Years Experience Fintech + AI-EdTech Remote-First

Skills & Technologies

Backend & APIs

Python (Asyncio, Multiprocessing)
Django (DRF)
FastAPI
Flask
RESTful APIs

AI/LLM & Automation

RAG Pipelines
Agentic Workflows (LangGraph)
LangChain
Prompt Engineering
OCR Fine-tuning
LLM Evaluation (Ragas)

Databases & Vector Stores

PostgreSQL
MySQL
Redis
Pinecone (Vector DB)
MongoDB

Cloud, DevOps & System Design

AWS (EC2/S3/RDS)
GCP
Docker
GitHub Actions (CI/CD)
Celery
Microservices Architecture
System Design (HLD/LLD)

AI Platforms

OpenAI
Together AI
Gemini AI

Experience

Artificial Intelligence Engineer

Sarithm

Remote Freelance · Broomfield, CO, USA · Mar 2026 – Present
  • AI Platform: Built an AI-powered platform for Haulr, driving operational efficiency through new features and workflow automation.
  • Chatbot Integration: Delivered conversational chatbot assistance to streamline user interactions and improve service accessibility.

Lead Backend Engineer

Neuro-Bridge Tech Pvt. Ltd.

Remote · Apr 2024 – Present
  • Chanakya Learning: Architected a B2B/B2C exam engine on Django + Celery that automates grading via a GPT/Gemini RAG pipeline — 94% accuracy on handwritten submission feedback.
  • Chanakya AI: Built a multilingual agentic chatbot spanning 12+ languages; cut API token costs 30% through prompt optimization and Redis-cached context retrieval.
  • Leadership: Leading the monolith-to-microservices migration, lifting system uptime to 99.9%.

Senior Software Developer

TejPaisa

Remote Freelance · Faridabad, India · Jun 2023 – Oct 2023
  • Built and maintained backend services in Python, Django, and REST APIs for a live fintech platform.
  • Worked across MySQL, MongoDB, and Google Cloud Platform (GCP) to support scalable data operations and deployments.

Software Developer

SabPaisa SRS Live Technologies

New Delhi, India · Dec 2021 – May 2023
  • Engineered core RESTful APIs for a high-traffic payment platform; optimized MySQL query performance, cutting endpoint latency 40%.
  • Architected a modular KYC Validation Engine for third-party integrations — reduced merchant onboarding time 70% with 100% fintech compliance.

Projects

AI-Powered Platforms & Fintech Systems in Production

Enterprise Project
Live
Chanakya Learning — AI exam and grading platform screenshot

Chanakya Learning

94% OCR Accuracy Hybrid Search (BM25+Vector) Ragas-Evaluated RAG

AI exam engine for B2B schools and B2C students, turning handwritten answers into graded feedback via a GPT/Gemini RAG pipeline. Question papers are auto-generated from raw textbooks using hybrid BM25 + vector search, with retrieval tuned by MMR.

B2B B2C
Enterprise Project
Live
Chanakya AI multilingual chatbot interface screenshot

Chanakya AI

12+ Languages LangGraph State Management 30% Lower Token Cost

A production-grade agentic chatbot built on LangGraph for multi-turn conversations across 12+ languages. Stripe, Google Pay, and Apple Pay power a tiered subscription model with secure transaction webhooks in Django.

Live Chat
Enterprise Project
Live
COB client onboarding dashboard screenshot

COB (Client Onboarding)

70% Faster Onboarding Modular KYC Engine 100% Compliance

End-to-end merchant KYC and onboarding platform for SabPaisa. A modular validation engine integrates third-party checks across providers, and an internal dashboard gives ops full visibility into onboarding status.

Dashboard

Education & Certifications

Master of Computer Applications

Kalinga Institute of Industrial Technology

Bhubaneswar, Odisha · Aug 2018 – May 2020 · CGPA 7.08

Bachelor of Computer Application

Arcade Business College

Patna, Bihar · Aug 2015 – May 2018 · 63%

Certifications

Certified in Python — ICETL Technology Certified in Data Structures — Katallyst

Let's Build Something Amazing!

👋 Say hi — I'm open to backend & AI engineering roles, freelance work, and collaborations.

skgovind29@gmail.com · +91 9525700120

Download Resume