API Test Engineer

Intepros; Pittsburgh (Allegheny County); Hybrid; USD 85,000 - 120,000; Full time

Job summary

Intepros is seeking an API Test Engineer to support a high-visibility data-processing platform in a contract-to-hire capacity. The role combines manual and automated testing to validate REST APIs, data workflows, and system integrations in a hybrid environment (Pittsburgh, PA and Lake Mary, FL).

The ideal candidate has 5+ years in software quality engineering, strong Python scripting, SQL validation, and experience building automation frameworks or CI/CD pipelines. Hybrid onsite 4 days.

Qualifications

• 5+ years in software quality engineering or testing.
• Hands-on API testing and integrations.
• Ability to develop test cases independently.
• Proficiency in Python and SQL validation.
• Knowledge of HTTP methods and JSON payloads.

Responsibilities

• Design, develop, and execute functional, integration, regression tests.
• Automate test scripts with Python.
• Validate end-to-end data workflows and API payloads.
• Identify defects and collaborate with developers.
• Support automation coverage expansion over time.

Skills

API testing

Test automation

Python scripting

SQL validation

HTTP methods

Tools

Postman or Insomnia

Python

SQL query tools

Selenium

SoapUI

JMeter

vREST

Ping API

Job description

API Test Engineer (Contract-to-Hire)

Pittsburgh, PA | Lake Mary, FL - Hybrid, 4 days onsite

We are seeking an experienced API Test Engineer to support the development and enhancement of a complex, high-visibility data-processing platform. This role will focus on validating mission-critical system integrations and end-to-end data workflows through a combination of manual and automated testing. The ideal candidate has strong API testing experience, a passion for quality engineering, and the ability to thrive in a fast-paced environment.

Responsibilities

• Design, develop, and execute functional, integration, regression, and performance test cases.
• Perform positive, negative, boundary, and error-handling testing for REST APIs and system integrations.
• Develop and maintain automated test scripts, with a strong emphasis on Python-based automation.
• Validate end-to-end workflows involving APIs, SFTP file transfers, database updates, and system-generated outputs.
• Analyze data movement across multiple systems and ensure accuracy throughout the process.
• Validate JSON request/response payloads, headers, and HTTP status codes.
• Identify, document, and troubleshoot defects while collaborating with development teams to drive resolution.
• Support continuous quality initiatives and help expand automation coverage over time.

Required Qualifications

• 5+ years of software quality engineering or testing experience (strong candidates with 3–4 years may be considered).
• Hands-on experience with API testing and application integrations.
• Experience creating and executing test cases independently.
• Proficiency with Python scripting and SQL/database validation.
• Strong understanding of HTTP methods (GET, POST, PUT, DELETE), status codes, and JSON request/response structures.
• Experience validating end-to-end system workflows and data processing.

Tools & Technologies

• Postman or Insomnia
• Python
• SQL query tools
• Selenium
• SoapUI
• JMeter
• vREST
• Ping API (nice to have)

Preferred Qualifications

• Experience building or maintaining automation frameworks.
• Exposure to CI/CD environments and automated testing pipelines.
• Experience with performance or load testing.