GraphQL API Developer – End-to-End API Design

CoreData Systems

Contract · Remote · Flexible hours

About the role

CoreData Systems is launching an integration project that ties together billing, CRM, and internal APIs. We need a GraphQL API Developer to design, implement, and optimize the data layer that will serve as the backbone for these connections.

Key responsibilities

• Design and develop a scalable GraphQL schema that aggregates data from billing, CRM, and internal services.
• Implement resolver logic in NodeJS, ensuring performance and security.
• Collaborate with frontend engineers to expose React-friendly queries and mutations.
• Create and maintain documentation for API contracts and versioning.
• Set up monitoring, logging, and automated testing for the GraphQL endpoints.

Must-have skills

• Strong experience building production GraphQL APIs.
• Proficiency in NodeJS and REST API concepts.
• Solid understanding of authentication, rate limiting, and error handling.
• Ability to work independently and communicate clearly in a remote setting.

Nice to have

• Experience with React data fetching patterns (Apollo, Relay).
• Familiarity with CI/CD pipelines and containerization.
• Knowledge of billing or CRM system integrations.