Full-stack development · Backend systems

Building systems that hold up.

I build backend systems and full-stack products that stay dependable when the workload grows.

Sibsankar De

Profile / 01

Full Stack Developer with hands-on experience building Spring Boot REST APIs, deploying production systems on AWS, and shipping end-to-end products across distributed messaging, real-time systems, and LLM pipelines.

Selected work

Next.jsNode.jsMongoDBRedis

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Experience

Oct 2025 to May 2026

Pinggy.io

Software Developer Intern · Remote

Designed Spring Boot REST APIs serving 10K+ users with sub-200ms average response time under concurrent load.
Reduced PostgreSQL query latency by about 35% through indexing and query restructuring on high-traffic read paths.
Built Python automations for scraping, newsletter delivery, and AI-assisted article generation.
Deployed backend services on AWS EC2 and RDS with automated deployment pipelines that reduced release time by about 50%.

Toolbox

Languages

6 items

JavaPythonTypeScriptC++CSQL

Frameworks & Databases

8 items

Spring BootNext.js

Education + wins

EducationAug 2024 to Jun 2028

Jalpaiguri Government Engineering College

B.Tech in Information Technology

GPA 8.5

01Runner-Up, JWOC 2026 open source challenge among national participants

021st Place, Hackwars 2025 hackathon

03300+ problems solved on LeetCode

Let's build something useful

Have a system worth solving?

Tell me about the problem, the team, or the opportunity. I read every message.

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