Middle Next.js Developer

Stack

Responsibilities

• ▹Build features across the Next.js client and the Fastify + Payload CMS backend according to product requirements
• ▹Follow the team's Feature-Sliced Design layering, naming and import conventions
• ▹Ship changes behind feature flags and A/B experiments, fully localized across every supported locale
• ▹Integrate third-party providers (billing, email/CRM, analytics) over REST APIs and webhooks
• ▹Cover functionality with unit, integration and e2e tests at the level the team expects
• ▹Run a thorough self-review before code review, and review teammates' code with the same rigour
• ▹Fix bugs and perform root-cause analysis for recurring issues
• ▹Optimize page and endpoint performance: rendering, caching, database queries, bundle size
• ▹Apply secure development practices: schema validation, access control, safe handling of secrets
• ▹Follow observability practices: structured logging, metrics and alerts using existing tooling
• ▹Break down, estimate and ship your own tasks within the sprint and stay accountable after release
• ▹Surface requirement clarifications, estimate changes and risks early and in writing; escalate complex architectural decisions to senior engineers

Requirements

• ▹2+ years of commercial React experience, including 1+ year with Next.js (App Router, Server Components, route handlers, rendering and caching strategies) and solid TypeScript
• ▹Node.js backend experience on a typed HTTP framework (Fastify, Nest or Express) with PostgreSQL: REST API design, schema migrations, integrations over REST and webhooks (signature verification, idempotency, retries), plus a working understanding of HTTP/REST, auth mechanisms and web security fundamentals
• ▹Hands-on with the modern client stack: TanStack Query, Zustand, React Hook Form + Zod, Tailwind CSS and a React component library such as HeroUI, MUI or shadcn/ui
• ▹Experience with a code-first headless CMS on PostgreSQL (Payload, Strapi, Directus or equivalent): collections, access control, generated types, migrations
• ▹Testing and delivery discipline: e2e tests (Cypress or Playwright), unit/integration tests (Vitest or Jest), Git flow, code review, working with CI
• ▹Daily use of AI development tools (Claude Code or equivalents), including configuring them for a project, with full ownership of the quality, security and correctness of generated code
• ▹English at B1+ level
• ▹Owns the outcome: takes a task from requirement to production without waiting to be pushed
• ▹Maximally autonomous: needs a goal, not step-by-step instructions
• ▹Verifies before trusting: treats AI output, third-party responses and your own code as unproven until tested
• ▹Structured communicator in a remote team
• ▹Knows the edge of their scope: escalates architectural and security decisions instead of improvising
• ▹Learns from incidents: fixes the root cause, not just the symptom

Soft skills

What we offer

• ▹Remote work: from anywhere, anytime
• ▹Unlimited paid time off
• ▹Paid national holidays
• ▹Company-provided MacBook for those who need one
• ▹Flexible independent contractor agreement

About the company

Ruby Labs is a tech company that creates and operates innovative consumer products across health, education and entertainment.