Isaí Céspedes
Frontend Engineer · TypeScript & React Specialist
- 01Frontend-leaning full stack engineer: TypeScript, React and Next.js in production for 4+ years.
- 02At Stack Builders: led a legacy-CMS migration (page load −35%) and cleared 4,000+ TypeScript errors.
- 03AI-augmented by design: spec-driven, multi-agent builds behind tests, CI and review gates.
Download CV ↓Email me →LinkedIn ↗CV in Spanish (PDF)See the full story →
Experience
one line per role- Stack BuildersFull Stack Software DeveloperJan 2024 – Jun 2026
- Pylon DataFull Stack Software DeveloperOct 2022 – Feb 2023
- MicroversePeer Technical MentorJan 2022 – Oct 2023
Projects
full chapters on the main page- ChurchOSIn productionFree, Spanish-first church management for small congregations, with each church's data isolated by the database itself.
- PilotBoardLive demo (payments and email off)An API-first job-search tracker that checks fit with AI and tailors resumes without fabricating claims.
- JarvisPersonal tool in daily use (private repo)An always-on bilingual voice assistant for macOS that runs on Claude and starts, steers and approves live Claude Code sessions.
- QuickShipped · ran in production Jun–Oct 2026 · now pausedA multi-tenant store and point-of-sale platform for Bolivian small businesses: subdomain storefronts, map-pin checkout, QR payments and courier hand-off.
A reference
testimonialquoted word for word
Isaí consistently supports teammates and contributes to team productivity by collaborating on complex features, helping unblock others, and refining tasks before implementation. He communicates proactively to resolve blockers with both the team and client, follows strong engineering practices, and demonstrates openness to feedback during code reviews.