Developer in Test

Salary: £44,000 - 84,000 per year

Requirements:

• 3+ years of hands-on experience with C#, including writing unit and integration tests and using mocking frameworks.
• At least 2+ years of focused experience in API testing.
• Strong background developing, maintaining, and scaling automated test frameworks.
• Experience working with Docker and a genuine passion for building and optimizing CI/CD pipelines.
• Familiarity with or a strong interest in incorporating AI tools into the development and testing lifecycle.
• Solid understanding of testing concepts, methodologies, and processes.
• Foundational grasp of web technologies, including web services, application servers, and RESTful APIs.
• An inquisitive nature with excellent analytical and problem-solving skills.
• Willingness to participate in, and often lead, technical discussions.
• Ability to learn rapidly and adapt to highly complex, fast-moving issues.
• A collaborative mindset, with the ability to work alongside a diverse group of stakeholders.
• A proactive attitude toward personal development and a strong sense of care and responsibility for your work.

Responsibilities:

• Automate test cases using the same coding languages and standards as the developers on your team.
• Focus primarily on coding, keeping manual testing to an absolute minimum.
• Create new, fast, and reliable automated tests.
• Investigate test failures and drive automation efficiencies using modern tools and framework techniques.
• Leverage AI-powered development tools to accelerate test script generation, optimize code quality, and streamline troubleshooting workflows.
• Improve existing or construct brand-new Continuous Integration and Continuous Deployment pipelines.
• Mentor other QEs on automation best practices and proactively support automation backlog efforts.
• Investigate bugs and perform deep root-cause analysis, including diving into source code when necessary.
• Participate in software architecture discussions and contribute to interactive whiteboard sessions.
• Collaborate on user stories and acceptance criteria.
• Serve as a subject matter expert and point of contact for product knowledge across the business.
• Participate regularly in knowledge-sharing sessions with the wider engineering team.

Technologies:

• AI
• API
• C#
• CI/CD
• Docker
• Support
• Web
• ChatGPT
• Copilot
• DevOps
• GitHub
• REST

More:

We are Trayport, and we value teamwork, innovation, and a shared passion for software testing. We invest in our people and provide opportunities to grow while helping us deliver high-quality software and the best possible user experience for our clients. We offer a collegial work environment where individuals are treated with dignity and respect, reflect the diversity of the community in which we operate, and support accommodations for applicants and employees who require them. This is a full-time role based in London at 2 Gresham Street.

last updated 36 week of 2026