API Testing CV Example
For QA engineers and testers specialising in API testing and validation. Highlights your proficiency with testing frameworks, automation tools, and your understanding of RESTful and SOAP architectures.
Recommended template: ExecutivePro
Key Skills to Include
Quick Tips
- Highlight your proficiency with API testing tools such as Postman, SoapUI, or REST Assured.
- Include experience with test automation frameworks and CI/CD pipeline integration.
- Describe your approach to testing edge cases, error handling, and security vulnerabilities in APIs.
- Mention any experience with contract testing tools like Pact or performance testing with JMeter.
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Upgrade to ProHow to Write Your API Testing CV
An API testing CV should demonstrate your ability to validate the backbone of modern software systems — the APIs that connect applications, services, and data. Employers want to see that you can test APIs thoroughly at the functional, integration, and performance levels, and that you understand how to automate these tests within continuous delivery pipelines. Your CV should combine tool proficiency with a structured testing methodology and evidence of catching critical defects before they reach production.
CV Structure
Use a reverse-chronological format with a profile, technical skills section, work experience, and education. List API testing tools and frameworks prominently in your skills section. For each role, describe the API landscape — number of endpoints, transaction volumes, and technology stack. Separate responsibilities from achievements and include specific examples of defects caught and testing efficiency improvements.
CV Format
Choose a clean, professional template that accommodates a technical skills section without appearing cluttered. Keep the CV to two pages and ensure your ISTQB certification and tool proficiency are visible within the first half of the document. Save as PDF for consistent formatting.
CV Profile Examples
Senior API Tester
ISTQB-certified API testing specialist with five years of experience validating RESTful and SOAP web services across banking, insurance, and e-commerce platforms. Expert in Postman, REST Assured, and SoapUI with strong experience building automated test suites integrated into CI/CD pipelines using Jenkins and GitHub Actions. Delivered comprehensive API test coverage for microservice architectures handling over 5 million daily transactions.
Mid-Level API Tester
API tester with three years of experience testing RESTful APIs for a SaaS platform serving 12,000 B2B customers. Proficient in Postman collections, Newman CLI for automation, and JSON Schema validation. Experienced in writing automated API tests in Java with REST Assured and integrating them into Maven-based CI/CD pipelines. Known for thorough edge case testing and clear, detailed defect reports.
API Tester — Automation Focus
Quality assurance engineer specialising in API test automation with four years of experience building and maintaining automated test frameworks using REST Assured, Karate, and Python Requests. Skilled in contract testing with Pact and performance testing with JMeter and Gatling. Passionate about shift-left testing practices and embedding quality throughout the development lifecycle.
State your years of API testing experience, primary tools, and the types of APIs you have tested. Include one headline achievement such as automation coverage percentage, defect detection rate, or a critical defect you prevented from reaching production.
Key Skills for Your API Testing CV
REST API Testing
Validating RESTful API endpoints for correct responses, status codes, headers, and payload structures.
Postman
Creating and managing API test collections, environments, and automated test scripts using Postman and Newman.
Swagger / OpenAPI
Using API specifications to validate endpoint compliance and generate test scenarios from documented contracts.
SOAP Testing
Testing SOAP web services using SoapUI, validating WSDL contracts and XML response structures.
Test Automation
Building automated API test frameworks using REST Assured, Karate, or Python Requests for continuous integration testing.
JSON & XML Validation
Verifying response payload structures against schemas and validating data types, nested objects, and array contents.
CI/CD Integration
Integrating automated API tests into CI/CD pipelines using Jenkins, GitHub Actions, or GitLab CI for continuous quality assurance.
Performance Testing
Conducting API load, stress, and endurance testing using JMeter or Gatling to validate system capacity and response times.
Bug Tracking
Logging detailed API defects in Jira with request/response payloads, headers, and clear reproduction steps.
Work Experience Examples
For each role, describe the API architecture, the number of endpoints, and the transaction volumes. Detail the types of testing you performed — functional, regression, security, performance, and contract testing. Include quantified achievements such as automation coverage, regression cycle time reductions, or production defect prevention. Show that your testing directly contributed to release quality.
Senior API Test Engineer
Clearstream Payment Solutions
Led API testing for a real-time payment processing platform connecting 45 banks and processing over 8 million transactions per day across the United Kingdom.
Responsibilities
- Designed and executed comprehensive API test plans covering functional, regression, security, and performance testing for 120 RESTful microservice endpoints.
- Built automated API test suites using REST Assured with Java, achieving 85% automation coverage across all critical payment processing flows.
- Validated JSON/XML payloads against OpenAPI specifications, ensuring schema compliance and backward compatibility across API versions.
- Integrated automated API tests into Jenkins CI/CD pipelines, running 2,400 test cases on every deployment to staging environments.
- Conducted API performance testing using JMeter, simulating peak transaction loads of 500 requests per second to validate system capacity.
Achievements
- Identified a critical race condition in the payment authorisation API that could have resulted in duplicate transactions worth an estimated £1.8M annually.
- Reduced API regression testing cycle time from three days to four hours through comprehensive test automation and parallel execution.
- Achieved zero critical API defects in production across six quarterly releases through rigorous pre-release testing coverage.
API Tester
Vertex Insurance Technologies
Tested RESTful APIs for a cloud-based insurance policy administration platform used by 28 underwriters managing combined premiums of £600M.
Responsibilities
- Created and maintained Postman collections covering 80 API endpoints with parameterised test data and environment variables.
- Validated API responses for data accuracy, error handling, and compliance with documented API contracts.
- Performed database validation using SQL queries to verify API transactions were correctly persisted in PostgreSQL.
- Collaborated with developers during sprint planning to identify API testing requirements and define acceptance criteria.
Achievements
- Discovered 15 undocumented API behaviour differences between environments that were causing inconsistent UAT results.
- Automated the nightly API regression suite using Newman and GitHub Actions, freeing two hours of daily manual testing effort.
Education & Qualifications
List your degree in computer science, software engineering, or a related field. Include ISTQB certifications and any tool-specific certifications for Postman, REST Assured, or performance testing tools. Mention relevant programming skills used in test automation.
ISTQB Foundation Level
The internationally recognised baseline certification for software testing professionals covering core testing principles.
ISTQB Advanced — Test Automation Engineer
An advanced certification demonstrating expertise in designing and implementing automated testing frameworks.
Postman API Fundamentals Student Expert
A certification validating proficiency in using Postman for API testing and collection management.
BSc Computer Science / Software Engineering
A degree providing the technical foundation for understanding APIs, web services, and testing methodologies.
Frequently Asked Questions
What tools should I list on an API testing CV?
How do I demonstrate API testing expertise beyond tool knowledge?
Should I include programming skills on an API testing CV?
How important is performance testing experience for an API tester?
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