Senior GraphQL Node.js Backend Engineer

Valiant Technologies LLC; Sunnyvale (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

Valiant Technologies LLC is seeking an experienced Software Developer specializing in GraphQL and Node.js to design, develop, and optimize scalable APIs and microservices. The role focuses on GraphQL schema design, resolver optimization, API security, and backend integration.

The candidate will design and maintain GraphQL APIs, implement federation, optimize performance, and integrate diverse databases and services while collaborating with frontend teams on API contracts for web and mobile

Qualifications

• Strong hands-on experience designing GraphQL APIs, schemas, and resolvers.
• Proven ability to optimize performance and scalability for microservices.
• Experience integrating relational and NoSQL databases with GraphQL data layers.
• Solid understanding of API security, auth, RBAC, and rate limiting.
• Familiarity with CI/CD pipelines and Agile development practices.

Responsibilities

• Design, develop, and maintain GraphQL APIs, including schemas, queries, mutations, and subscriptions.
• Implement federation or stitching using Apollo Federation or similar tech.
• Optimize performance with DataLoader, batching, caching, and delegation to prevent N+1 issues.
• Integrate PostgreSQL, MySQL, MongoDB, and Redis with GraphQL layers.
• Integrate REST APIs and gRPC services into data layers and backend systems.
• Apply API security measures: authentication, authorization, rate limiting, and depth checks.
• Troubleshoot latency, throughput, and memory usage; tune for scale.
• Develop automated tests with Jest, Mocha, or Supertest; contribute to test strategy.
• Collaborate with frontend teams on API contracts for web and mobile apps.
• Participate in code reviews, architecture discussions, and CI/CD improvements.

Skills

GraphQL API development

Node.js

API security

Testing

Tools

Apollo Server

Apollo Federation

DataLoader

Redis

PostgreSQL

MySQL

MongoDB

REST APIs

gRPC

Git

CI/CD

Job description

Valiant Technologies LLC is seeking an experienced Software Developer specializing in GraphQL and Node.js to design, develop, and optimize scalable APIs and microservices. The role focuses on GraphQL schema design, resolver optimization, API security, and backend integration.

The candidate will design and maintain GraphQL APIs, implement federation, optimize performance, and integrate diverse databases and services while collaborating with frontend teams on API contracts for web and mobile