Senior Frontend Architect: React/Next.js at Scale

GBL Tech

Portugal

On-site

EUR 55,000 - 85,000

Full time

37 hours ago

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Job summary

GBL Tech in Portugal is seeking a Senior Frontend Developer (React) to shape the architecture and technical direction of high‑performance web applications. You will lead frontend initiatives, set engineering standards, and build scalable experiences using React and Next.js.

Collaborate with product and cross‑functional teams in an Agile environment, drive performance improvements including Core Web Vitals and SEO, and mentor engineers to maintain high code quality and sustainable delivery.

Qualifications

Extensive professional experience building high-scale web apps.
Strong knowledge of TypeScript, React.js, and Next.js.
Proven Web Performance optimisation including Core Web Vitals, SEO, and accessibility.
Experience with automated testing (Unit, Integration, E2E) and TDD/Shift-Left.
Ability to lead architecture decisions and mentor developers.
Experience in Agile environments.

Responsibilities

Define and evolve frontend architectures for high-traffic web applications.
Improve performance via Core Web Vitals, SSR, SSG, ISR, caching, and SEO.
Establish frontend engineering standards and best practices.
Define and implement testing strategy across Unit, Integration, and E2E testing.
Mentor developers and drive engineering decisions.
Collaborate with product and business stakeholders in Agile environments.