At InnotechGroup, I designed and built a Java 21 / Spring Boot 3 microservice that replaced a legacy system while preserving REST contracts, so six consumer systems switched over without changes. I also built an authentication microservice that handles up to 1,500 RPS at p95 under 120 ms.
I built a user management microservice with a PostgreSQL schema designed for its load profile, and cached reference and role data with Caffeine. This cut response time by 35% and calls to dependent systems by 60%.
At CentrInformJSC, I built a microservice for processing excise declarations, integrated with internal services over REST and Kafka, and developed a paperless machine-readable power of attorney module using electronic signatures. Earlier, I worked in QA and technical support, which informs how I approach testing and operations.
