API Tester

Job title

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In this role you will be validating and ensuring the functionality, performance, and security of application programming interfaces (APIs). This role involves designing and executing test cases to verify that APIs meet business requirements and adhere to industry standards, as well as collaborating with development teams to identify and resolve issues.

This role is temporary for a period of 1 year starting 1st Aug 2025

Requirements:

• Develop and implement comprehensive test plans for API testing, including functional, regression, performance, and security testing.
• Create and maintain detailed test cases and scenarios based on API specifications and requirements.
• Execute manual and automated tests on APIs to validate functionality, reliability, and performance.
• Identify, document, and track defects in APIs, collaborating with development teams to troubleshoot and resolve issues.
• Conduct performance testing to assess API responsiveness and scalability under various load conditions.
• Perform security testing to identify vulnerabilities and ensure APIs are secure against potential threats.
• Maintain clear and comprehensive documentation of test cases, test results, and defect reports.
• Work closely with developers, business analysts, and other stakeholders to understand API requirements and provide feedback on API design and functionality.
• Participate in process improvement initiatives to enhance testing methodologies and practices.

Required Skills/qualifications

• Bachelor’s degree in Computer Science, Information Technology, or a related field.
• Proven experience in API testing, including RadyAPI, RESTful and SOAP APIs.
• Proficiency in using API testing tools (e.g., Postman, SoapUI, JMeter) and automated testing frameworks (e.g., Selenium, RestAssured).
• Strong analytical and problem-solving skills with attention to detail.
• Excellent verbal and written communication skills, with the ability to collaborate effectively with cross-functional teams.
• Proven experience working in an Agile Scrum environment.
• Ability to work independently and collaboratively in a team-oriented environment.
• Availability for meetings between 09:30 – 16:00 CET (Netherlands time); flexible outside these hours