Headline

Software Developer @ Dev Technosys | Full Stack | Node.js | Next.js | Java | SQL | Typescript | Cl/CD | Docker | AWS

About

Full Stack Engineer | Node.js · Next.js · Microservices · Real-Time Systems I build backend systems that scale — the kind that handle 10,000+ daily transactions without breaking a sweat. With 2 years of professional experience, I specialize in designing high-performance APIs, real-time event-driven architectures, and distributed microservices. From fintech payment pipelines to fantasy sports platforms, I've shipped systems that cut manual intervention by 40% and improved user engagement by 20%. What I bring to the table: - Backend-first thinking with Node.js, Express.js, WebSockets, and microservices - Database design across MongoDB & PostgreSQL — optimized for speed and scale - Payment integrations (Razorpay), KYC pipelines, and webhook-driven reconciliation - DevOps-aware development with Docker, CI/CD, AWS EC2/S3 - Exploring the AI space — built Aether Scope and Code sphere, an LLM observability platform tracking latency, token usage, and inference analytics across OpenAI & Gemini Currently at Dev Technosys (CMMI Level 3) as a Software Developer, where I was recognized as Employee of the Month for delivering critical modules. I'm passionate about clean architecture, solving hard problems, and writing code that other engineers actually enjoy working with. Skills: JavaScript · TypeScript · Node.js · Express.js · Next.js · React.js · Redux · MongoDB · PostgreSQL · Redis · Prisma · Supabase · REST APIs · WebSockets · Microservices · Docker · CI/CD · AWS EC2 · AWS S3 · System Design · Real-Time Systems · Distributed Systems · Razorpay · JWT · Authentication & Authorization Open to interesting backend and full-stack opportunities. Let's connect!

Location

Jaipur

AI stack

antigravity

claude code

cursor

gemini

langchain

openai

Work experience

Software Developer at Dev Technosys- CMMI Level 3, Oct 2024 - Apr 2026 · 1 y 6 mo, Jaipur, Architected high-performance backends using Socket.io and Node.js, achieving 70% process automation through optimized real-time event handling. ​Designed normalized PostgreSQL and MongoDB schemas with advanced indexing to ensure high-speed query performance for transactional workflows. ​Integrated Razorpay for secure end-to-end payment flows and built live tracking systems to streamline e-commerce supply chain lifecycles. ​Consistently delivered critical modules ahead of project deadlines, earning the Employee of the Month award.

Frontend Developer at AXTechnosoft, Dec 2023 - Jun 2024 · 7 mos, Gurugram, Revamped core pages for a crypto tax calculator to improve user engagement through enhanced UX design. ​Collaborated with cross-functional teams using Next.js and TypeScript to increase feature rollout speed.

Education

Bachelor of Technology, Computer Software Engineering, Arya college of engineering and it

Full Stack Web Development [MERN], Grras Solutions (P) Ltd

Public links

github: https://github.com/karan-singh12

leetcode: https://leetcode.com/karansingh17

karandevportfolio.vercel.app: https://karandevportfolio.vercel.app/