@jiehan
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Jul 25, 2025 · 10 min read · This is another "post-mortem" blog after debugging a mysterious automation testing issue. TL;DR: Our test, which validates database entries, didn’t fail even when the backend service responsible for writing those entries was offline. The culprit? Cyp...
Join discussionJun 19, 2025 · 4 min read · This is a quick recap of my effort to catch up on modern frontend trends, particularly the renaissance of Server-Side Rendering (SSR), and how it compares to Client-Side Rendering (CSR) and Static Site Generation (SSG). I’ve organized this post as pe...
Join discussionJun 6, 2025 · 8 min read · Incident Recap It happened to us on production environment: Our FastAPI service suddenly started timing out every request, including the plain Kubernetes health checks that didn’t touch the database or any external dependencies. We restarted the de...
Join discussionMay 9, 2025 · 7 min read · Background & Requirements About two years ago, I led a project to build a new email microservice for our company. The existing system—built about 15 years ago—was embedded in a monolithic codebase using a now-less-popular language. It sent customer e...
Join discussionMay 2, 2025 · 5 min read · We have a relatively new mail service built using Amazon SES (in addition to an old on-premise mail server). Our customers are mostly enterprise, and therefore layers of security checks. This blog attempts to make it easier to understand the email au...
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