I design scalable systems.

As a Staff Developer, I design Bulutklinik’s high-traffic healthcare platform using microservice and event-driven architecture, serving as the technical compass for critical design decisions. Grounded in domain-driven design, test-driven development, and performance optimization principles, I continuously improve teams’ code quality and delivery speed while aligning product strategy with technology vision. This approach sustainably enhances the platform’s reliability and flexibility.

As a Senior Developer, I took end-to-end technical ownership of the microservice architecture, automatic scalability, and integration layers of a cloud-based HIS (Hospital Information System) & Telemedicine platform. By re-architecting internal services with secure OAuth 2 flows, I reduced prescription and data synchronization errors by 95% and raised system availability to 99.95%. I also mentored a team of 4–6 people in TDD/DDD and authored a comprehensive code-review guide, shortening the PR feedback loop and significantly expanding test coverage.

As a Back-end Developer, I managed the real-time query performance and large-scale data processing layers within the core R&D team of a vertical search engine spanning 40M+ documents. While designing the PHP/Python-based pipeline that crawled 1M URLs per hour and seamlessly indexed 5 GB of data daily, the hybrid MySQL-Redis caching layer I built reduced query latency from 1,500 ms to roughly 140 ms. By partitioning the database and cache clusters, I cut the total DB load by 80% and ensured the system’s high availability.