R

Middle Next.js Developer (Full-stack, TypeScript, Fastify)

ruby-labs • Ukraine
Remote
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Build and ship product features for a D2C subscription platform using Next.js (App Router), Fastify + Payload CMS, and Cloudflare Workers. Requires 2+ years of React/Next.js experience, Node.js backend expertise, and hands-on testing/delivery discipline. Own end-to-end development with strict accountability for quality, performance, and observability.

Key Highlights
Own end-to-end development of features in a TypeScript monorepo (Next.js, Fastify, Payload CMS, Cloudflare Workers)
Strict accountability for production quality, performance, and observability with no half-finished work
Hands-on engineering role requiring deep expertise in Next.js (App Router), Node.js, PostgreSQL, and modern frontend stacks
Key Responsibilities
Develop and ship features end-to-end across Next.js client, Fastify backend, and Cloudflare Workers
Ensure code adheres to Feature-Sliced Design conventions and follows strict import/naming rules
Integrate third-party services (billing, CRM, analytics) via REST APIs and webhooks
Write and maintain unit, integration, and e2e tests; perform root-cause analysis for bugs
Optimize performance (rendering, caching, database queries) and implement observability practices
Apply secure development practices (schema validation, access control, secret handling)
Break down tasks, estimate work, and own delivery within sprints with full accountability
Surface risks, blockers, and estimate changes proactively in writing
Escalate architectural and security decisions to senior engineers
Technical Skills Required
Next.js (App Router, Server Components) TypeScript Fastify/Node.js (REST API, PostgreSQL)
Benefits & Perks
Remote work environment with flexibility
Unlimited paid time off (PTO)
Company-provided MacBook
Flexible Independent Contractor Agreement (tax advantages, networking, reduced obligations)
Nice to Have
Experience with TanStack Query, Zustand, React Hook Form + Zod, Tailwind CSS, or component libraries (HeroUI, MUI, shadcn/ui)
Experience with code-first headless CMS (Payload, Strapi, Directus)
Proficiency with AI development tools (Claude Code) and project configuration for AI
Experience with Git flow, CI/CD pipelines, and code review processes

Job Description

About the role

We are looking for a disciplined, highly autonomous Middle Next.js Developer to build and ship product features for one of our core D2C subscription products. You will own features end to end across a TypeScript monorepo—a Next.js App Router client, a Fastify + Payload CMS API on PostgreSQL, and Cloudflare Workers at the edge—from the moment you receive a task, through breaking it down, estimating, implementing, testing, and observability, to a clean release to production and confirmation that it works for real users.

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