Engineering notes
Investigations, measurements, and decisions from production work.
Detailed write-ups on CI performance, dependency graphs, systems migrations, testing, developer tooling, and practical AI.
Published notes
01
Systems architecture
How switching from Ably to Firebase cut real-time infrastructure costs by 95%
A cost investigation and migration strategy that replaced a mismatched pricing model while preserving presence reliability and safe rollback.
6 min read
02
Developer experience
How barrel files slow down TypeScript builds
A benchmarked barrel-file removal that made production builds 29% faster, reduced module collection, and enabled accurate CI test selection.
7 min read