I don't think a bio is convincing evidence of anything, so instead of
describing myself, here's what I've actually done — every row below links
to a real diff you can go read right now.
Status is honest: 
means it shipped; 
means it's an open PR awaiting maintainer review.
| Security is a habit, not a checklist item |
 Root-caused and fixed a CRITICAL Spring Security CVE + 5 others in Vault-Web #267 — one dependency bump, six vulnerabilities closed |
| I finish things, not just propose them |
Vault-Web #250 — chat UI stability fix Vault-Web #244 — JVM/Postgres timezone bug |
| I can navigate and fix a codebase I don't own, at any scale |
 PR #152712 — race-condition fix in snapshot lifecycle retries, in the search engine behind a huge share of the internet |
| Comfortable across the Kafka ecosystem end-to-end |
 clickhouse-kafka-connect #775 — NPE fix when writing null into a Nullable(JSON) column, merged by ClickHouse clickhouse-kafka-connect #790 — surface the failing column + types on a conversion error (DLQ/JMX, not just logs), merged by ClickHouse kafka-ui #1904 — reverse-proxy OAuth bug spring-kafka #4518 — the official Spring project |
| Distributed systems as trade-offs, not diagrams |
 Built system-design-tradeoffs from scratch — every answer is a trade-off matrix, real Spring Boot/Kafka/Redis code, and a production incident |
system-design-tradeoffs — most interview prep hands you a diagram and calls it the answer. This doesn't: every question is a trade-off matrix, a mock interview transcript showing the real follow-up drilling, a production incident, and buildable Spring Boot/Kafka/Redis/Postgres code behind the chosen approach.
- Trade allocation engine — Java, Kafka, Redis, PostgreSQL — high-throughput pipeline processing real-time financial transactions
- Real-time Kafka pipeline — AWS MSK, Flink, EKS — 40% throughput improvement on event-streaming infrastructure
- Live MySQL → PostgreSQL migration — zero downtime, zero data loss, across live production services
- Microservices security hardening — Spring Boot, JWT, API Gateway — auth hardening across a distributed service mesh
- Book management REST API — Spring Boot, PATCH-based versioning — clause versioning & metadata endpoints for a document assembly system
Backend
Cloud & DevOps
Data & Messaging
Frontend
Custom-built from my live GitHub data, regenerated daily by a GitHub Action — not an off-the-shelf widget.
If you've got an interesting distributed-systems or backend problem, that's the fastest way to get my attention — LinkedIn is open.