API Developer VA
Designs, builds and documents the APIs that connect your products, partners and internal systems, with the security, versioning and reliability that integrations depend on. Makes your platform something others can build on.
- Top 1% vetted talent
- No lock-in contracts
- Replacement guarantee
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Hourly rates · No lock-in contracts
Description
An API Developer VA designs, builds and documents reliable interfaces that connect products, partners and internal systems. They can create REST or GraphQL APIs, manage authentication and versioning, build webhooks and monitor performance and usage. Outsource Teams provides top 1% vetted talent with specialist API and back-end development experience, no lock-in contracts and a replacement guarantee.
Responsibilities
- Design REST and GraphQL APIs with consistent resource models, pagination, filtering and versioning.
- Write OpenAPI specifications first and generate documentation, SDKs and mocks from them.
- Implement APIs in Node.js, Python, Go, Java or .NET with thorough validation and error handling.
- Secure APIs with OAuth 2.0, API keys, rate limiting and scopes, and audit access.
- Build webhook systems with retries, signatures and idempotency so partners receive events reliably.
- Set up API gateways such as Kong, AWS API Gateway or Apigee and manage routing, quotas and analytics.
- Write contract, integration and load tests and run them in CI.
- Monitor latency, error rates and usage per client and act on the data.
- Support partner developers with clear docs, examples and a changelog.
Software & Tools
Requirements
- 5+ years of back-end development with at least 3 years focused on designing public or partner-facing APIs.
- Strong skills in one of Node.js, Python, Go, Java or C#, plus deep knowledge of HTTP, REST principles and GraphQL.
- Experience with OpenAPI, API gateways, OAuth 2.0 and JWT, and webhook design.
- Familiarity with PostgreSQL or similar databases, caching with Redis and message queues.
- Experience with Postman, contract testing tools and load testing with k6 or JMeter.
- Excellent written English, as API documentation is a core deliverable.
- Fast and dependable home internet with backup power, working hours aligned with the client.
Frequently Asked Questions
What types of APIs can they build?
They can design and develop REST and GraphQL APIs for internal, partner-facing or public use.
Can they document the API?
Yes. They can create OpenAPI specifications, examples, SDK documentation and changelogs for developers.
How can they secure an API?
They can implement OAuth 2.0, API keys, scopes, rate limiting and access auditing.
Can they build webhooks?
Yes. They can build webhook systems with retry logic, signatures and idempotency to improve delivery reliability.
What tools can they use?
They can work with REST APIs, GraphQL, Node.js, Postman, OpenAPI and Docker.
How experienced are the candidates?
Candidates are expected to have at least five years of back-end development experience, including at least three years focused on APIs.
How much does it cost?
Rates start at $12 USD per hour for entry level, $16 USD per hour for intermediate and $22 USD per hour for senior talent. Full-time and part-time options are available.
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