February 27 2025
Circuit Breaker in Practice
How to stop a slow or failing dependency from dragging the rest of your system down just because every request keeps failing the same way.
System Design · Page 2
Scalability, boundaries, APIs, and failure modes without diagram theatre.
February 26 2025
Your REST API Was Almost Never REST
Why many 'REST' APIs are really just HTTP with JSON, and why understanding that difference helps interface clarity more than label purity.
February 28 2025
Service Contracts and Backward Compatibility
How to evolve internal integrations without treating another team's consumer as if it were just a detail of your deploy.
March 1 2025
How to Design a Third-Party Integration Without Becoming a Hostage
How to integrate with an external vendor without spreading their contract through your whole system or turning every change on their side into your incident.
March 6 2025
Webhooks, Retries, Duplication, Signatures, and Event Order
How to treat webhooks as real asynchronous integration, not as a friendly POST that always arrives once and in the right order.
July 12 2025
Strangler Fig in Practice
How to surround legacy step by step, with a clear boundary, controlled traffic, and a reversible cutover.
July 15 2025
Old and New Versions Coexisting at the Same Time
How to plan compatibility across code, contract, and data when a perfect cutover simply does not exist.