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public class Debojyoti {
String name = "Debojyoti Mandal";
String role = "Software Development Engineer @ Juspay";
String location = "Kolkata → Bangalore, India";
String[] currentWork = {
"Distributed microservices — 500K+ daily transactions, 99.99% uptime",
"5x API latency improvement with Haskell + PostgreSQL (sub 50ms)",
"AI/RAG automation — 90% less manual data retrieval across 4 orgs",
"Keycloak OIDC SSO — cut login support tickets by 40%"
};
String[] langs = {"Java", "Go", "Python", "Haskell", "C++", "TypeScript"};
String[] cloud = {"AWS (EC2/S3/SQS)", "Docker", "Kubernetes", "Terraform"};
String[] backend = {"PostgreSQL", "Kafka", "ActiveMQ", "Redis", "REST", "OAuth2"};
String highlight = "🏆 CodeChef 5★ (2032) · LeetCode Guardian (2179) · AIR 3 CodeStudio · GFG Rank #1";
}
Languages
Backend & Infrastructure
Cloud & DevOps
| 🏆 Platform | Handle | Achievement |
|---|---|---|
| CodeChef | jyoti369 | ⭐⭐⭐⭐⭐ 2032 Rating — Top 1% globally |
| LeetCode | jyoti369 | 🛡️ Guardian — 2179 Rating · AIR 11 Weekly Contest 307 |
| Codeforces | jyoti369 | 1517 Rating |
| GeeksforGeeks | jyoti369 | Ranked #1 at institute — 3,000+ problems solved |
| CodeStudio | jyoti369 | AIR 3 — Monthly Contest #7 |
🔵 Juspay Feb 2024 → Present SDE
├─ 500K+ daily txns · 99.99% uptime · horizontal scaling
├─ 5x latency improvement — Haskell + PostgreSQL + index tuning
├─ Keycloak OIDC SSO → -40% login support tickets
└─ AI/RAG + Vespa → -90% manual data retrieval across 4 orgs
🔴 Red Hat Aug 2023 → Jan 2024 Assoc. SDE
├─ CI/CD modernization → -45 min deploy time, +50% release speed
└─ AWS S3 + Terraform + ActiveMQ migration — zero downtime
🟡 Rupeek Jan 2023 → Jul 2023 SDE Intern
├─ 15+ REST APIs (Node.js) → -60% transaction processing time
└─ Backend migration → +75% system throughput
| Project | Stack | Highlights |
|---|---|---|
| fullstack-kit | Java | Daily Java practice — DSA, system design, Spring snippets & interview prep |
| Text-to-SQL Engine | Node.js, PostgreSQL, LLMs | 95% accuracy, 500 rps, <200ms p99 |
| Sorting Visualizer | React.js | 8 algorithms, 60 FPS, live demo |
