Software Developer

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

We are seeking an experienced Software Developer specializing in GraphQL and Node.js to design, develop, and optimize scalable APIs and microservices. The ideal candidate will have strong expertise in GraphQL schema design, resolver optimization, API security, and backend integration.

Key Responsibilities

• Design, develop, and maintain GraphQL APIs, including schemas, queries, mutations, and subscriptions.
• Implement schema federation or stitching using Apollo Federation or similar technologies.
• Optimize GraphQL performance using DataLoader, batching, caching, and query complexity controls to prevent N+1 issues.
• Integrate relational and NoSQL databases, including PostgreSQL, MySQL, MongoDB, and Redis.
• Integrate REST APIs, gRPC services, and third-party platforms into GraphQL data layers.
• Implement API security, including authentication, authorization, RBAC, rate limiting, and query depth restrictions.
• Troubleshoot and optimize API latency, throughput, scalability, and memory usage.
• Develop automated unit, integration, and end-to-end tests using Jest, Mocha, or Supertest.
• Collaborate with frontend teams to define API contracts and support web and mobile applications.
• Participate in code reviews, architecture discussions, and CI/CD improvements.

Required Skills

• Strong hands-on experience with GraphQL API development and Node.js.
• Experience with GraphQL schemas, resolvers, queries, mutations, subscriptions, and API integration.
• Knowledge of Apollo Server, Apollo Federation, DataLoader, and caching strategies.
• Experience with SQL/NoSQL databases and REST/gRPC integrations.
• Understanding of API security, performance optimization, automated testing, and microservices architecture.
• Familiarity with Git, CI/CD pipelines, and Agile development practices.

Preferred Skills

• Experience integrating GraphQL with React, iOS, Android, or other frontend applications.
• Knowledge of Redis and CDN/edge caching.
• Experience with production-scale API monitoring, debugging, and performance tuning.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.