API Automation Tester

Hybrid Working - Local Office - 2 days a week on site.

Financial Services

Lorien's leading banking client is looking for an API Automation Test Engineer with strong hands-on expertise in Rest Assured and Java to design, develop, execute and maintain automated API test cases for RESTful and SOAP services.

The ideal candidate will have extensive hands-on experience with Rest Assured and Java, specifically designing, developing, executing and maintaining automated API test cases for RESTful and SOAP services. Strong API automation framework development experience is essential, alongside SQL and CI/CD knowledge. Financial Services experience would be advantageous.

We are looking for someone who is Immediately Available with no notice period.

This role is based in a Local Office.

This role will be Via Umbrella.

Working in a Hybrid Model of 2 days a week on site.

Key Responsibilities

• Design, develop, execute and maintain API test cases for RESTful and SOAP services using Rest Assured (Java).
• Build and maintain API automation frameworks supporting functional, integration and regression testing.
• Develop reusable, data-driven automated test scripts using Java.
• Perform API response validation, including JSON/XML schemas, HTTP status codes, headers and payloads.
• Conduct backend database validation using SQL queries.
• Execute end-to-end API testing across upstream and downstream systems.
• Integrate automated API test suites into GitLab CI/CD pipelines.
• Perform API security testing, including OAuth/JWT authentication, authorisation and negative testing.
• Collaborate with developers, architects and product teams to identify defects and troubleshoot issues.
• Improve automation coverage, framework stability and testing efficiency.

Essential Skills & Experience

• Strong hands-on experience designing, developing, executing and maintaining API automated test cases using Rest Assured (Java).
• Proven experience testing RESTful and SOAP APIs.
• Strong Java programming skills and experience building API automation frameworks.
• Experience with functional, integration and regression API testing.
• Knowledge of JSON, XML, HTTP protocols and API response validation.
• SQL experience for backend database testing.
• Experience with GitLab CI/CD and automated test execution.
• Understanding of API security, authentication and authorisation.
• Strong analytical, debugging and problem-solving skills.

Desirable Experience

• Previous experience within Financial Services or Banking.
• Experience working in Agile/Scrum environments.
• Knowledge of banking regulatory and compliance requirements.
• Familiarity with DevOps and continuous testing practices.

IND_PC3

Guidant, Carbon60, Lorien & SRG - The Vertage Group Portfolio are acting as an Employment Business in relation to this vacancy.