Healthcare automation platform
Replaced a manual spreadsheet- and email-based operational workflow with a production healthcare platform, owning architecture, infrastructure, data modelling and delivery end to end.
Javier Costa Rosa
Software engineer working across product, architecture and complex backend systems.
I design and evolve software products where technical decisions have to survive real users, constraints and change.
Selected work
Browser extension evolution
Led the evolution of a consent-management browser extension under platform and cross-browser constraints, restructuring the product around clearer boundaries while keeping delivery moving.
Web crawling reliability
Led cross-cutting changes to architecture, observability and failure handling in a high-usage crawling product, reducing customer-reported issues and making later product changes safer.
Experience
Career at a glance. View the full experience
Tech Lead — Product Reliability & Architecture
Aug 2025 — PresentTech Lead — Product Engineering & Browser Extension
Nov 2024 — Aug 2025Tech Lead & Solutions Architect
Apr 2023 — Oct 2024Senior Full Stack Engineer
Mar 2021 — Apr 2023Full Stack Engineer — R&D
Feb 2018 — Mar 2021Beyond work
Based in Valencia.
Usually somewhere around a piano
or underwater.