Senior Software Development Engineer in Test (SDET)

Company: Capco
Apply for the Senior Software Development Engineer in Test (SDET)
Location: London
Job Description:

Overview

In this Senior SDET role, you will shape automated testing across client-facing projects in the financial services domain. You’ll work within Capco’s Engineering team to deliver high-quality, scalable test strategies and artefacts, leveraging cloud-native tech and agile practices. You’ll contribute to UI and API automation, ensure robust test data and environments, and collaborate across cross-functional teams. This position offers exposure to multiple FS & Energy domains, continuous learning, and the chance to drive quality-first delivery at scale.

Pay / Benefits

  • Discretionary bonus
  • Competitive pension
  • Health insurance
  • Life insurance and critical illness cover
  • Mental health support
  • Flexible and generous family leave policies in various situations’,’5 weeks holiday with buy/sell option’,’40 hours of annual training and continuous learning opportunities’,’Day-one Business Coach for goal acceleration’,’GP online services

Responsibilities

  • Create robust, scalable test strategies and artefacts
  • Develop and manage test artefacts such as plans, specifications, scripts, and reports
  • Manage test environments and generate consistent test data
  • Execute UI and API tests using modern automation tools
  • Collaborate with engineers and cross-functional teams to ensure quality-first delivery

Key requirements

  • Proficiency in at least one OOP language (Java, Scala, or JavaScript)
  • Experience building test automation frameworks from scratch (Selenium, Cypress, Playwright)
  • Experience with UI and API automation
  • Familiarity with Jira, TestRail, Jenkins, GitHub, and SonarQube
  • Understanding of CI/CD pipelines and cloud infrastructure
  • Collaborative mindset
  • Strong communication
  • Team-oriented problem solving
  • Test automation frameworks (Selenium, Cypress, Playwright)
  • UI and API automation
  • Jira, TestRail, Jenkins, GitHub, SonarQube

Posted: September 14th, 2026