Senior Frontend Engineer

Team: Development

Location: Barcelona - Cataluña

Commitment: Full-time Contrato Indefinido

Workplace Type: hybrid

⭐ How will you make an impact?

Architect and refine dense, stateful interfaces, including reservation managers, multi-property calendars, and unified guest messaging.
Collaborate horizontally across squads to build reusable UI patterns, shared component libraries, and robust data-access layers.
Bring surfaces to life with real-time server-sent events and optimistic updates that keep user data instantly synchronized without refreshes.
Lead high-visibility platform migrations, smoothly consolidating domain packages into a single monorepo while keeping production live and stable.
Elevate developer tooling by centralizing strict TypeScript settings, shared test configurations, and fast, signal-rich CI pipelines.
Ensure safe, reliable releases through feature flagging, plan-based functional gating, and diligent post-rollout cleanup.
Drive testing excellence across unit, visual regression, and end-to-end suites while building actionable real-user monitoring.
Mentor mid-level frontend engineers, foster strong code review practices, and write clear technical documentation to empower the entire engineering team.

⭐ What makes you a great fit?

You bring 6+ years of production experience building complex React and TypeScript applications, including at least 2 years in a large, shared codebase with multiple collaborating teams.
You have a proven track record of migrating and consolidating large frontend estates incrementally without resorting to high-risk complete rewrites.
You possess deep expertise in state management, real-time data flows (e.g., SSE), and performance optimization for complex web applications.
You have hands-on experience with automated testing tools (such as Vitest, Cypress, or happy-dom) and visual regression testing.
You set high standards for software quality and enjoy establishing shared foundations that elevate the work of surrounding teams.
You embrace a continuous improvement mindset, using feedback, analytics, and monitoring to refine user experiences and technical patterns.
You excel at boundaryless collaboration, seamlessly partnering across product squads to align on architecture and unblock technical dependencies.
You take pride in mentoring peers, sharing technical context, and building a supportive engineering culture.