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Ujjawal Kumar

Full-Stack Developer

Remote

Profile Score

Skills & Expertise (26)

JavaScript Intermediate

8.1/10

Years Exp

React Intermediate

7.6/10

Years Exp

Node.js Intermediate

7.5/10

Years Exp

AWS Beginner

7.1/10

Years Exp

Postgresql Intermediate

7.0/10

Years Exp

SQL Web Development System Design Object Oriented Programming Computer Networks Operating systems Database Management System Data Structures Algorithm and Design Analysis Redis Docker MongoDb MySql Tailwind CSS CSS HTML Express.js Zustand NextJS Java Typescript

Work Experience

Technical Content Writer

GEEKSFORGEEKS

Jun 2022 - Jun 2023

Authored and enhanced 19+ articles on Linux/Unix, JavaScript, DSA and C++ for publication on the GeeksforGeeks portal. Drove 300K+ page views by producing high-impact technical content for the developer community.

Full-Stack Developer

COGITARE LABS

Aug 2024 - Present

Integrated BullMQ to orchestrate the image generation service, implementing a queue-based architecture where a dedicated worker processes up to 500 queued jobs per hour and sends real-time completion notifications to clients via websocket, improving reliability and scalability of asynchronous processing. Designed scalable database architectures in PostgreSQL developing both normalized and denormalized schemas to handle 100,000+ daily messages and 1,000+ concurrent users, cutting average query latency by 15%. Accelerated response times from 350 ms to under 80 ms (a 77% improvement) by integrating a Redis caching layer for socket, room, and user metadata, minimizing database reads by 45%.