I'm Engin — a software engineer with 20+ years building and leading enterprise systems. Today my focus is designing AI-integrated, multi-tenant SaaS platforms in .NET and React.

This blog is about the engineering decisions behind those systems. Not just implementation notes or happy-path tutorials, but the trade-offs that shape real software: where to draw service boundaries, how to design tenant-aware data models, when to favor consistency over convenience, how to handle authorization and caching under load, and how to keep systems observable, maintainable, and safe as they grow.

Most of it comes from hands-on experience designing and evolving production-grade SaaS architecture: modular services, multi-tenant PostgreSQL, event-driven messaging, a YARP/BFF gateway, Redis-backed caching, CI/CD, and the operational patterns that keep high-concurrency systems healthy. Read more →