Projects

Experimental benchmark for choosing distribution keys in Citus/PostgreSQL, balancing JOIN locality against data skew with reproducible synthetic and real-dataset pipelines.

Spring Boot service for telecom number lifecycle management with Liquibase migrations, optimistic locking, audit history, and safe concurrent reservation.

Full-stack tutoring platform with Spring Boot, React, MySQL, JWT sessions, role-aware workflows, assignments, uploads, WebSocket chat, and video-call signaling.

Catalog search architecture where PostgreSQL stays the source of truth and Elasticsearch is updated asynchronously through a transactional outbox.

Go service using PostgreSQL as source of truth and a Redis cache-aside ring with application-managed consistent hashing across standalone shards.

Thread-safe Java 25 rate limiter library with token bucket and sliding window implementations, retry hints, metrics, tests, and comparison demos.

Production-style Spring Boot implementation of the outbox pattern with idempotency, Kafka dispatch, retries, dead-letter handling, metrics, and Testcontainers.

End-to-end BI platform with CSV ingestion, PostgreSQL warehouse modeling, n8n orchestration, Superset dashboards, forecasting, and anomaly detection.