Notes

Thinking in public, briefly.

Short, opinionated notes on engineering leadership and digital products. Written slowly, kept deliberately small.

Jun 2026
How I lead
Five principles I keep coming back to when building engineering organizations — on shipping, design, ownership and platforms.
Apr 2026
The chisel, not the keyboard
With AI, generating code is easy. The craft has moved to subtraction — modern engineers are refiners, not builders.
Sept 2025
A 2x performance win is never free
ByteDance rewrote a Go service in Rust and saved $300k a year. The interesting part is everything the headline leaves out.
Aug 2025
AGENTS.md: a README for the robots
AI coding agents need predictable instructions, and your README deserves to stay human. One open convention solves both.
Jul 2025
Notes from WeAreDevelopers 2025
15,000 developers, 16 stages and one theme everywhere: AI in software engineering. Impressions from the World Congress in Berlin.
Jun 2025
MCP is quietly becoming the platform
Model Context Protocol is maturing from a spec into an ecosystem — and it's the foundation agents have been waiting for.
May 2025
Engineering is a mindset, not a toolset
Watching a team fight limited APIs to bring a product to life is a better lesson in engineering than any tool — AI included.

05 / Contact

Tell me what you’re building.

I’m particularly energized by early-scale product challenges — where the engineering organization needs to grow as fast as the product does.

Always happy to talk engineering organizations, digital products, or the next thing worth building. The fastest way to reach me:

sergio@behrends.com.ar /in/sergiobehrends sbehrends @Blunk