Type-driven architecture, safe refactors, and long-term maintainability.
I prioritize strong typing at system boundaries like API contracts and domain models, then keep internals pragmatic. The goal is to encode invariants that matter most while avoiding type complexity that slows delivery or obscures intent.
I version contracts explicitly, deprecate before removal, and ship codemods or migration docs for consuming teams. For breaking changes, I stage adoption with compatibility layers and CI checks that detect downstream impact early.
I avoid throwing for expected business failures and use typed result patterns where useful, then reserve exceptions for truly exceptional paths. This makes control flow explicit and improves reliability when services integrate across teams.