API Automation Tester

Sector: IT

Reference: BBBH _

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.