Bidyut Kundu
Software Engineer ( Open To Work )“The best systems are the ones you don‘t notice — they just work, quietly, at any scale.“
Kolkata, India
Experience
C
Conas Consulting Private Ltd.Software Engineer
April 2023 – Present ( 3+ YOE )
Pune, India (On-Site)
Tools I work with
Node.jsExpress.jsTypeScriptPostgreSQLMongoDBRedisReact.jsNext.jsTailwind CSSAWS LambdaAPI GatewaySQSS3RDSCloudWatchK6GitHub ActionsCI/CDDocker
What I‘ve done
- Microservices migration after production outage: EC2 buckled under 50K+ concurrent requests. Moved to Lambda + API Gateway microservices, stress-tested with K6. 99.9% uptime, 60% lower cloud spend.
- Async QR tracking across 10+ distributed nodes: Replaced manual tracking with an event-driven pipeline. Scan → SQS worker → alert. 80% fewer errors, 2+ hrs/day saved.
- OTP auth replaced with Microsoft OAuth 2.0 + MFA: Removed all homegrown credential infrastructure. Short-lived JWTs, MFA enforced company-wide.
- Query latency: 30s → 2s on multi-million-row table: Composite indexes, table partitioning, Redis cache-aside. Cold storage barely touched anymore.
- LCP improved 3.5s → 2.1s for low-bandwidth clients: PDF generation moved to background queue. Server-side caching added. Core Web Vitals went green.
Personal Projects
Some things I built because I thought they’d be useful, fun, or worth exploring.
