At a Glance
- Tasks: Lead the design and implementation of innovative test automation frameworks in financial services.
- Company: Join Capco, a forward-thinking consulting firm shaping digital transformation.
- Benefits: Enjoy a competitive salary, generous leave, health insurance, and continuous learning opportunities.
- Other info: Collaborative culture with a focus on inclusivity and personal growth.
- Why this job: Make a real impact with cutting-edge technology while mentoring future engineers.
- Qualifications: Strong experience in UI/mobile test automation and API testing required.
The predicted salary is between 65000 - 105000 £ per year.
Requirements
- Strong experience delivering UI and mobile test automation using Selenium, Web Driver, Cucumber, Robot Framework, or similar technologies.
- Proven expertise in API testing (REST/SOAP) using tools such as Postman, JMeter, or equivalent testing frameworks.
- Experience working with cloud-based testing platforms including Browser Stack, Sauce Labs, Appium, or comparable services.
- Solid understanding of quality engineering tooling including Jira, Jenkins, Git Hub, Sonar Qube, and modern CI/CD practices.
- Experience using AI-enabled tools responsibly to improve engineering productivity while maintaining appropriate human oversight, governance, accessibility, and software quality.
- Development experience using Java, Ruby, Python, or similar programming languages.
- Experience delivering performance and load testing using JMeter, Load Runner, Performance Center, or equivalent tools.
- Exposure to cloud platforms such as AWS, Azure, Open Shift, or Tanzu/Cloud Foundry.
- Experience applying Dev Ops practices, Agile methodologies, and accessibility standards including WCAG/AAA.
- Interest in responsible AI, automation, and emerging quality engineering technologies to continually improve software testing and delivery.
Responsibilities
- Lead the strategy, architecture, and implementation of robust test automation frameworks across financial services projects.
- Work closely with cross-functional teams to deliver quality-first engineering solutions using modern testing tools and practices.
- Mentor engineers, foster best practices in quality engineering, and help shape our automation testing capability.
- Champion AI-enabled ways of working and encourage the responsible use of approved AI and automation tools to improve engineering productivity, accelerate test delivery, and enhance software quality.
- Architect reusable, scalable test automation strategies and frameworks across web, mobile, and API platforms, applying AI-enabled engineering approaches where appropriate to improve efficiency and test coverage.
- Design, build, and maintain automated test suites for user interfaces, APIs, and backend services using modern testing frameworks.
- Integrate automated testing into CI/CD pipelines while optimising cloud-based testing platforms to support reliable and scalable software delivery.
- Lead test data management, performance and load testing, accessibility validation, and continuous quality improvement across delivery teams.
- Establish testing standards and encourage the responsible use of approved AI tools and automation to improve collaboration, productivity, and engineering quality.
- Technologies
- AI
- API
- Appium
- AWS
- Architect
- Azure
- Backend
- Browser Stack
- CI/CD
- Cloud
- Cloud Foundry
- Cucumber
- Dev Ops
- Git Hub
- Support
- JIRA
- Java
- Jenkins
- JMeter
- Mobile
- Open Shift
- Postman
- Python
- REST
- Robot Framework
- Ruby
- SOAP
- Selenium
- Web
- UX UI Design
- More
We are Capco, a consulting firm in Londons Technology & Engineering practice area, hiring for a permanent Principal Software Developer in Test (SDET) role.
We deliver high-impact technology solutions for Tier 1 financial institutions and help shape the future of digital transformation across Financial Services and Energy.
You will work in a collaborative, flat, entrepreneurial culture with access to continuous learning, training, and industry certifications.
We offer a people-first benefits package that includes discretionary bonus, competitive pension, health insurance, life insurance, critical illness cover, mental health support, family-friendly leave, backup care sessions, five weeks of annual leave with holiday buy/sell options, at least 40 hours of annual training, business coaching from day one, online GP services, and extra perks such as Wellhub, travel insurance, Tastecard, season ticket loans, Cycle to Work, and dental insurance.
We are committed to an inclusive, accessible recruitment process and a culture where individuality and collaboration are valued.
- last updated 36 week of 2026
- #J-18808-Ljbffr
Principal Software Development Engineer in Test in London employer: Capco
Capco is an exceptional employer that fosters a collaborative and entrepreneurial culture, allowing you to deliver high-impact transformation programmes for Tier 1 financial institutions. With a strong commitment to employee growth, you will benefit from continuous learning opportunities, structured career development, and a supportive environment that values work-life balance through generous leave policies and wellness perks. Join us in shaping the future of cyber and operational resilience while enjoying a competitive benefits package in the vibrant city of London.
StudySmarter Expert Advice🤫
We think this is how you could land Principal Software Development Engineer in Test in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Capco or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Capco.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Capco.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Capco that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Principal Software Development Engineer in Test in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Capco.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Capco and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Capco
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Capco uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
