Alex Rivera
Senior Frontend Engineer
Frontend engineer with 8+ years building fast, accessible web apps. Specialised in TypeScript, Svelte and React, design systems, and shaving milliseconds off render paths. I care about clean abstractions and shipping.
Experience
Senior Frontend Engineer · Northwind Labs
Mar 2021 — PresentSan Francisco, CA
- Led migration of a 200k-LOC React app to SvelteKit, cutting bundle size 41%.
- Built a Tailwind-based design system adopted by 6 product teams.
- Mentored 4 engineers; introduced typed end-to-end testing with Playwright.
Frontend Engineer · Brightwave
Jun 2018 — Feb 2021Remote
- Shipped a real-time dashboard handling 10k concurrent WebSocket clients.
- Improved Lighthouse performance score from 62 to 98.
Education
B.S.in Computer Science
Aug 2012 — May 2016University of California, Berkeley· Berkeley, CA
Focus on human–computer interaction and distributed systems.
Skills
TypeScriptSvelte / SvelteKitReactTailwind CSSNode.jsGraphQL
Languages
- English Native
- Spanish Full Professional
- Portuguese Professional Working