Santosh Kumar

Software Development Engineer (Backend)

Noida, Uttar Pradesh 2+ yrs exp 74 · Very Good

About

No bio added yet

Skills & Expertise (37)

Typescript Advanced

8.2/10

Years Exp

Node.js Advanced

8.2/10

Years Exp

MongoDb Intermediate

7.6/10

Years Exp

RESTful APIs Intermediate

7.4/10

Years Exp

AWS S3 Intermediate

7.0/10

Years Exp

Docker Intermediate

6.8/10

Years Exp

Microservices Intermediate

6.6/10

Years Exp

SQL Intermediate

6.4/10

Years Exp

JavaScript Intermediate

6.2/10

Years Exp

Express.js Intermediate

6.0/10

Years Exp

Spring Boot Beginner

4.6/10

React.js BCrypt Firebase Sentry Next.js Azure Blob Storage Tailwind CSS HTML CSS LangGraph Autogen CrewAI MCP Passport.js JWT SQS RabbitMQ BullMQ Java Redis Postgresql MySql FastAPI NestJS Go C++

Work Experience

Software Development Engineer (Backend)

Indorse Technologies Private Limited

Aug 2025 - Present

Built the Node.js/TypeScript backend (Express, MongoDB, Redis) for SecureConnect, a two-sided security-services marketplace auth (JWT/RS256, MFA, MSG91 OTP & email), real-time updates (Socket.IO), and a hardened API (Helmet, rate limiting, Zod validation). Integrated Razorpay payments and RazorpayX payouts with an idempotent, claim-before-transfer settlement flow and an India tax-compliant engine computing TDS (194C), GST, and TCS on provider earnings. Built a cron-based payout processor with distributed locking (advance + T+2 final settlements) and deployed the service on AWS EC2 using PM2, Nginx, and SSL.

Software Development Engineer (Backend)

Sthambh

Apr 2024 - Jun 2025

Re-architected a synchronous, zero-retry notification system into an async queue-based pipeline using SQS, priority queues (P1/P2/P3), an iterator service, and dedicated worker pools, eliminating chronic delivery failures and adding retry logic, deduplication, bulk sends, and per-campaign tracking via a Notification Tracker DB. Designed and owned a microservices backend (NestJS, TypeScript, MongoDB) covering interview management, admin workflows, authentication, payments, and LMS integration, cutting feature delivery time by 30% through modular, independently deployable services. Built RESTful APIs with Swagger docs, integrating AWS S3, Azure Blob Storage, Razorpay, and OpenAI, all third-party services went live in production without connectivity incidents. Hardened system security with JWT + Passport.js, bcrypt, and API rate limiting; wired error monitoring via Sentry, reducing production downtime incidents by 40%.