GrowthLoop / Senior Frontend Engineer (Full-Stack & Infrastructure Focus)
February 2025 – Present
- Architected a non-isolated Vitest infrastructure for 1,900+ tests spanning 200+ files in a shared runtime, reducing CI duration by 93% (15.5m to 67s) via MSW fixtures and strategic dependency pre-bundling.
- Ranked #1 in repository volume (1.3M+ lines of change) over 14 months; maintained a near 1:1 addition-to-deletion ratio (628k++ / 670k--) to drive a shift toward clean architecture backed by robust developer tooling and automated CI gates.
- Architected a local-first E2E testing ecosystem using Docker-in-Docker (DinD) and Playwright; developed a modular seeding utility and a transaction-based CI validator to catch schema regressions.
- Engineered a real-time data-mapping engine using React Flow and PostgreSQL; shifted state tracking to an indexed materialized view with concurrent refreshes and implemented since_token polling to fetch only changed records, reducing server load and UI re-renders.