API Test Engineer

Veterans Sourcing Group, LLC; Pittsburgh (Allegheny County); On-site; USD 100,000 - 130,000; Full time

Job summary

Veterans Sourcing Group, LLC is seeking an experienced API Test Engineer to design, execute, and automate testing for REST‑based APIs supporting mission‑critical, bi‑directional system integrations. You will focus on service‑level testing to ensure reliability, security, and readiness for production.

The ideal candidate has 5+ years of system testing, hands-on experience with Postman, SoapUI, and JMeter, and can translate requirements into robust test scenarios across functional, negative, and

Qualifications

• 5+ years of system testing, writing and executing test cases.
• Experience with REST API testing and service‑level validation.

Skills

REST APIs

Test automation

API testing tools

Test case design

System testing

Tools

Postman

SoapUI

JMeter

Ping API

vREST

Job description

Work Location: Pittsburgh, PA 15258, Lake Mary, FL 32746 & New York, NY 10166

(Onsite at least 4 days per week in office work)

Job Description:

• We are seeking an experienced API Test Engineer to design, execute, and automate testing for REST‑based APIs supporting mission‑critical, bi‑directional system integrations. This role focuses on service‑level testing and plays a key part in ensuring API reliability, security, and readiness for production.
• The ideal candidate has a strong understanding of REST APIs, hands‑on experience with API testing tools, and the ability to translate technical requirements into robust test scenarios across functional, negative, and integration cases.
• Boundary conditions
• Error handling and edge cases

Commonly referenced tools in internal materials include:

• Postman
• SoapUI
• JMeter
• Ping API
• vREST

An API tester needs to understand:

• HTTP methods (GET, POST, PUT, DELETE)
• Status codes (200, 201, 400, 401, 403, 404, 500, 429)
• Request/response headers
• JSON request and response bodies

Required Skills/ Experience

• 5+ years of system testing, writing and executing test cases
• Application testing experience related to REST API