H2Context mission /h2 ul liJoin a Scrum team focused on digital customer onboarding flows /li liContribute to the modernisation of an existing application and the development of new features /li liStrong focus on UI quality, scalability, performance, and best practices /li liProgressive role in co‑leading front-end development within the team after an onboarding period /li /ul br/ h2Key technical skills /h2 ul linext.js 14+ /li liApp Router, Middleware /li liServer Client Components /li liRendering strategies: SSR, SSG, ISR /li liReact 18 TypeScript /li liModern React patterns and concurrent features /li liStrict TypeScript typing /li liState Data Management /li liTanstack Query for caching and mutations /li liComplex form handling with React Hook Form + Zod /li liAuthentication Security /li liAuth0 integration (preferred) /li liMiddleware-based authentication /li liModern web security best practices /li liTesting Quality /li liUnit testing: Jest, React Testing Library, Msw /li liAccessibility testing aligned with WCAG 2.1 AA /li liUI / UX Performance (partly nice-to-have) /li liMaterial UI (Mui) /li liEmotion / CSS‑in‑JS /li liCore Web Vitals and runtime performance optimisation /li liDevOps Collaboration /li liGIT workflows and code reviews /li liAzure DevOps pipelines /li liDocker basics /li liFeature flagging and monitoring tools /li liAnalytics Growth /li liUnderstanding of A/B testing and its practical application /li liBasic knowledge of Google Tag / Data Layer /li liBasic experience with Growthbook /li /ul br/ h2Profile requirements /h2 ul li3+ years of front-end experience, including 2+ years with next.js React in production /li liStrong problem‑solving skills /li liHigh attention to detail, accessibility, and performance /li liExperience working in Agile / Scrum environments /li liStrong communication and collaboration skills /li /ul