Felix Asher

Software design, test-driven development, integration testing, backend systems, distributed systems. Generalist by choice, focused on system behavior rather than individual components.

Exploring how test-driven development works as a design discovery tool rather than a correctness mechanism. Currently focused on invariants, integration-first testing, and failure-driven design.

Writing and refining The Essence of TDD, a field-driven exploration of test-first development as design discovery, with an emphasis on vertical slices and invariant-driven thinking.

Open to thoughtful discussion around software design, testing philosophy, and failure modes in real systems. Especially interested in comparing field experiences rather than debating definitions.