API Test Engineer
Open to candidates in Pittsburgh, PA; Lake Mary, FL; and New York, NY
Contract role - potential to convert | Hybrid setting (4 days a week onsite)
We are seeking an experienced API Test Engineer to support mission-critical, bi-directional system integrations through comprehensive service-level testing. In this role, you'll be responsible for designing, executing, and automating API tests to ensure reliability, security, and production readiness across complex REST-based environments.
This is an excellent opportunity for a quality-focused engineer who enjoys validating integrations, identifying edge cases, and collaborating with development teams to deliver high-performing applications.
Responsibilities
- Design, develop, and execute test cases for REST APIs and system integrations.
- Perform functional, integration, regression, and negative testing to validate API behavior.
- Create and maintain automated API test suites.
- Validate request/response payloads, headers, and status codes.
- Identify, document, and track defects through resolution.
- Ensure APIs meet performance, reliability, and security requirements.
- Collaborate with developers, business analysts, and project teams to understand requirements and translate them into effective test scenarios.
- Support production readiness activities and contribute to continuous quality improvement initiatives.
Required Qualifications
- 5+ years of software/system testing experience, including writing and executing test cases.
- Hands-on experience testing REST APIs and application integrations.
- Strong understanding of HTTP methods (GET, POST, PUT, DELETE) and status codes (200, 201, 400, 401, 403, 404, 429, 500).
- Experience with JSON request and response bodies.
Tools & Technologies
- Postman
- SoapUI
- JMeter
- Ping API
- vREST
- Selenium
#LI-AL1