Middle Next.js Developer

Role overview

A mid-level frontend and full-stack engineering role focused on a consumer subscription product, working inside a typed TypeScript monorepo that spans a Next.js App Router client, a Fastify and Payload CMS API backed by PostgreSQL, and edge services on Cloudflare Workers. You will own features end-to-end—from breakdown and estimate through implementation, testing, and production release—while working within a strict Feature-Sliced Design codebase. The position suits a disciplined engineer who treats production stability as the standard and is comfortable with high autonomy inside a sprint.

Responsibilities

• Build product features across the Next.js frontend and the Fastify plus Payload CMS backend, respecting layered Feature-Sliced Design conventions.
• Ship changes behind feature flags and A/B experiments, fully localized across every supported locale.
• Integrate third-party providers for billing, email or CRM, and analytics through REST APIs and webhooks.
• Cover functionality with unit, integration, and end-to-end tests, and conduct thorough self-reviews before requesting peer review.
• Diagnose and root-cause bugs, optimize rendering and caching strategies, database queries, and bundle size.
• Apply secure development practices—schema validation, access control, careful secret handling—and contribute structured logging, metrics, and alerts.
• Break down, estimate, and deliver tasks within sprints, communicate risks early, and elevate architectural or security questions to senior engineers.

Requirements

• Two or more years of commercial React experience, including at least one year with Next.js (App Router, Server Components, route handlers, rendering and caching) and confident TypeScript.
• Node.js backend experience on a typed HTTP framework such as Fastify, Nest, or Express, with PostgreSQL, REST API design, schema migrations, and webhook integrations including signature verification, idempotency, and retries.
• Hands-on familiarity with TanStack Query, Zustand, React Hook Form with Zod, Tailwind CSS, and a component library like HeroUI, MUI, or shadcn/ui.
• Experience with a code-first headless CMS on PostgreSQL such as Payload, Strapi, or Directus, including collections, access control, and generated types.
• Testing discipline using Playwright or Cypress for end-to-end coverage and Vitest or Jest for unit and integration tests, plus Git flow, code review, and CI workflows.
• Daily use of AI development tools such as Claude Code or equivalents, including configuring context, instructions, and integrations, with ownership over the quality and security of generated output.
• English at B1 or above.

Nice to have

• Background in subscription or D2C product development.
• Experience operating against edge runtimes like Cloudflare Workers.
• Familiarity with performance budgets and observability platforms.

Benefits and work setup

• Fully remote position open to candidates within roughly plus or minus four hours of CET.
• Unlimited paid time off plus paid national holidays.
• Company-provided MacBook.
• Independent contractor agreement with flexibility on location and schedule.
• Three-stage interview process: recruiter screen, technical interview, and final interview.