Software Developer in Test (SDET)

Senior Software Developer in Test – Java & Cloud Automation

Location: London 3 days on site per week

Rate: up to £500 per day, inside IR35

Contract Duration: ASAP, until November 2026 + ext

Description

We’re looking for a Senior Software Developer in Test – Java & Cloud Automation to join our team in London in a hybrid working mode. In this role, you will ensure the quality and reliability of complex data pipelines and APIs through cutting-edge automation practices. You’ll leverage your expertise in Java, testing frameworks, and cloud-native architectures to design and implement scalable test solutions, while collaborating closely with developers to embed TDD/BDD across the lifecycle.

Responsibilities

• Design, develop, and maintain automated test frameworks and tools for end-to-end (F2B) testing
• Implement API testing for RESTful services to validate functionality, robustness and performance
• Evaluate and validate data pipelines on Databricks for accuracy and consistency
• Collaborate with engineering teams to drive TDD/BDD adoption throughout development
• Contribute to and optimize CI/CD pipelines in GitLab to enable continuous delivery
• Ensure scalable test solutions within Azure-based cloud architectures

Requirements

• Strong proficiency in Java programming with a focus on automated testing
• Solid knowledge of TDD/BDD methodologies and related frameworks
• Experience in testing RESTful APIs and complex integration workflows
• Familiarity with data pipelines and F2B testing approaches
• Hands‑on experience with Azure Cloud, Databricks and GitLab CI/CD (highly beneficial)
• Strong analytical and troubleshooting skills, with a keen eye for quality and detail

Nice to Have

• Experience testing large-scale, distributed systems
• Knowledge of containerized environments (Docker/Kubernetes)
• Familiarity with performance and reliability testing tools

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