Senior SDET (Software Development Engineer in Test)

Senior SDET (Software Development Engineer in Test)

London, UK (Hybrid - 50% onsite)

£400 per day (Inside IR35)

Active SC Clearance Required

Must-Have Skills

• Active SC Clearance
• 7+ years' experience within Software Testing/SDET roles
• 5+ years' experience developing automation frameworks
• Strong Java development experience (5+ years)
• Commercial experience with Selenium WebDriver and Page Object Model (POM)
• Strong API Automation experience using Karate
• Commercial JavaScript experience (3+ years)
• Commercial Python experience (2+ years)
• Experience with Kafka and MQ messaging validation
• Strong SQL and database validation skills (Oracle preferred)
• Experience integrating automation into CI/CD pipelines
• Banking, Financial Services or Payments experience

Desirable Skills

• ISO20022 or SWIFT messaging
• XML and XSD validation
• Jenkins or Azure DevOps
• Git, Maven or Gradle
• Linux
• JIRA and Xray
• ISTQB Certification

Key Responsibilities

• Develop and maintain enterprise automation frameworks
• Build reusable UI, API and database automation solutions
• Automate testing across REST APIs, Kafka, MQ and messaging platforms
• Validate XML, XSD and ISO20022 financial messages
• Enhance framework reporting, logging and diagnostics
• Integrate automated testing into CI/CD pipelines
• Support end-to-end testing across critical banking payment applications
• Produce technical documentation and contribute to framework improvements

This is an excellent opportunity to work on a high-profile banking programme, helping modernise automation capabilities while delivering robust, scalable testing solutions across mission-critical payment systems.