System Design
Principles of Scalable System Design
How to think about capacity, fault tolerance, and evolution when designing backends that survive real traffic and real failures.
Safyan Yaqoob
I build reliable software products end to end—from early design through production. I care about clear systems, thoughtful APIs, and shipping work that holds up in the real world.
Writing
ASP.NET Core
Exception Handling in ASP.NET Core 8
Patterns for global handlers, problem details, and predictable error contracts without leaking implementation details.
Payments
Designing Idempotent Payment APIs
Why retries are inevitable at scale and how to model transactions so duplicate requests never double-charge a customer.
Backend
Webhook-Driven Workflows That Stay Consistent
A practical approach to state machines, delivery guarantees, and reconciliation when external systems drive your core flow.