Rails

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Engineering

The Constant Frozen at Boot Bug: A Ruby Exercise For An Interview

Jun 10, 2026 6 minutes to read

A payment handler resolves its method ids into class-level constants. One day charges start landing with a NULL method and the only fix is a pod restart. Why? This is a real production bug that makes an excellent interview question.

#ruby #rails #interviews #debugging

Engineering

Ruby IO buffering

Jan 16, 2026 4 minutes to read

Comments

Your logs arrive late in your microserviced application. Someone cannot see recent application logs in kibana. Why is that? Here's why TTY detection and multiple buffering layers cause this and recipe to fix.

#ruby #rails #docker #logging