Hey 👋 I’m Sahan.

Welcome to Sahan’s Engineering Notes, a small newsletter about distributed systems, resilient software, architecture, and the lessons hidden inside real production problems.

I’ll use this newsletter to share new articles from sahansera.dev, along with occasional observations that may not become full blog posts.

You can expect one or two emails per month - only when I have something useful to share.

A few good places to start

• No Healthy Upstream - what this deceptively simple error actually tells us.
• The Acknowledgment Gap - reasoning about reliability between accepting work and completing it.
• How Does the Python Virtual Environment Work? - a look underneath Python’s familiar venv command.

If there is a distributed-systems or software-architecture topic you’d like me to investigate, reply and tell me. Replies come directly to me.

Thanks for reading,

Sahan