GraphQL API Developer Needed for High-Volume API Gateway Setup

LumenWorks

Freelance · Remote · Flexible hours

About the role

LumenWorks is extending its B2B SaaS platform with a multi‑tenant feature set. We need a GraphQL API Developer to design and implement tenant‑aware schemas, integrate with existing services, and ensure data isolation while keeping performance high.

Key responsibilities

• Architect and develop multi‑tenant GraphQL endpoints for core product features
• Collaborate with product owners to translate business rules into GraphQL type definitions and resolvers
• Integrate GraphQL layer with existing NodeJS services and REST APIs
• Write unit and integration tests, and set up CI checks for schema validation
• Document API contracts and usage guidelines for internal teams

Must-have skills

• Strong experience building GraphQL APIs in NodeJS
• Proficiency with React for schema consumption and testing
• Deep understanding of REST API integration patterns
• Knowledge of multi‑tenant architecture and data security

Nice to have

• Familiarity with Apollo Server and Federation
• Experience with TypeScript and automated testing frameworks
• Background in performance tuning for high‑throughput APIs