Taís Massaro

Work experience

Doctolib (Apr 2024 – current)

Software Engineer

• Modernizing legacy React/Rails codebase for doctor appointment calendar (JS→TS migration, type system consolidation, modern patterns)
• Leading frontend extraction from large Rails monolith into standalone packages; backend extraction into Rails engines
• Expanding into Kotlin/Spring Boot stack for new data streaming initiative (Kafka, RisingWave)

AMBOSS (Nov 2022 – Jan 2024)

Software Engineer

• Technical research for the rewrite of a 10-year-old legacy PHP content management system into a new React-based one, evaluating rich text libraries (Tiptap, ProseMirror, Lexical) and CMS frameworks in close collaboration with design and medical editors
• Collaborated with Design System team increase component adoption and improve UX consistency across main codebase
• Collaborated with Developer Experience team on modernization initiatives (removing enzyme, recompose and outdated React patterns)

Klarna (Oct 2020 – Oct 2022)

Engineer L2 (May 2022 – Oct 2022)

• Led technical scoping, planning and implementation of Klarna's B2B Portal redesign

Engineer L1 (Oct 2020 – Apr 2022)

• Built reusable component framework and GraphQL backend-for-frontend for merchant settings pages, enabling teams to add settings consistently across B2B portal
• Led the frontend implementation of a 4-eye review approval system for internal support tools, requiring two-person approval for critical changes to prevent incidents by allowing errors to be caught early
• Introduced pair programming practices across the team

Evermood GmbH (Nov 2019 – Sep 2020)

Software Developer

• Built MVP for employee mental health app using React Native, Expo, Typescript and Rails, working closely with CTO in 3-person dev team
• Contributed to product decisions and participated in technical hiring as part of small startup team (10 people)