Senior Frontend Developer (Next.js / React)

About the role

The web team behind Altium builds the public-facing web properties of the company: the main marketing site, documentation portal, customer dashboard, resource centre and regional sites, serving high traffic across roughly ten locales. This Senior Frontend Developer role focuses on building headless Next.js applications that consume Drupal data over GraphQL, while keeping the existing Drupal-integrated frontend stable and visually consistent during its migration. Prior Drupal knowledge is not required.

Key responsibilities

• Develop features and components in Next.js, React and TypeScript, using the App Router and React Server Components and choosing the right rendering strategy per page
• Integrate applications with Drupal via GraphQL and Apollo Client, implementing content freshness with ISR and on-demand revalidation
• Build and maintain reusable UI components on Radix UI, shadcn/ui and Tailwind CSS, aligned with the design system
• Maintain and extend existing Drupal themes (Twig templates, SCSS, Pug-based markup build, Webpack)
• Own Core Web Vitals, accessibility and technical SEO for the pages shipped
• Write component tests, contribute to the shared Playwright E2E suite and investigate production incidents with Sentry
• Take part in code review and help set engineering standards and codebase health

Required profile

• 4+ years of commercial React experience, including at least 2 years with Next.js in production
• Owns a feature end to end, from design handoff through rollout and post-release verification
• Can trace a production incident from an error report to root cause
• Makes technical decisions, states trade-offs and updates a position when evidence changes
• Treats visual regressions, accessibility and performance as part of "done"
• Willing to maintain an existing Drupal-integrated frontend while moving the platform forward

Required skills

• Strong JavaScript and TypeScript (strict mode)
• Next.js App Router and React Server Components in production
• Client-side GraphQL (Apollo Client or equivalent)
• Tailwind CSS and component library and design system principles
• Frontend caching: ISR, on-demand revalidation, TTLs and cache invalidation
• Core Web Vitals measurement and diagnosis tools, web accessibility standards, multi-locale applications
• SCSS and at least one template engine (Pug, Twig or similar); Webpack and frontend build pipelines; Git and code review

Nice to have: Drupal theming, Storybook, image and performance optimisation with Next Image and Sharp, Redis cache strategy, and marketing site instrumentation (GTM, dataLayer, consent management).