Senior Software Development Engineer - SRE

Job Title: Senior Software Development Engineer - SRE

Location: Nottingham - Hybrid

Working Pattern: 3 days in-office (Tuesday-Thursday) and 2 days remote.

Our Mission

We’re on a mission to be a force for good in lending. Throughout our almost 30-year history, we’ve consistently been recognised as a great place to work; in 2026, Capital One was officially ranked 9th in the UK’s Best Workplaces™ list. Hear from our team about what it’s like working at Capital One UK.

About the Role

We are looking for a Senior Engineer to join our Site Reliability Engineering (SRE) team. This role is ideal for a skilled Java engineer with a passion for understanding how complex systems work, analysing performance, and applying engineering solutions to make them more efficient, stable, and scalable. You'll lead on planning and implementing key SRE initiatives, optimise and automate how our systems operate, and improve observability through better monitoring and logging. You'll also work closely with your peers to drive consistency and high standards across SRE and the wider engineering community, so a real enthusiasm for influencing others and leading by example is essential.

What you’ll do

• You will technically lead a group of engineers responsible for maintaining and improving our back-end services for our most critical customer and/or data applications within the cloud.
• Contribute to the major optimisation and improvement themes within the team. Identifying opportunities to reduce operational overheads through observability and service automation.
• Drive engineering best practice (e.g., Operational Excellence, Security, Quality, Resilience etc.) and set standards across the team and wider SRE community.
• Innovate within your team and contribute within your technical domain.
• Deliver key pieces of intent from inception through to design and hands-on delivery, in collaboration with your Site Reliability Engineering Manager.

The skills and experience you need

• Production-grade experience of developing and managing APIs using Java & Springboot. Excellent understanding of SOLID principles, SOA, HTTP and REST.
• Production experience running microservices on container orchestration architectures.
• Good understanding of API authentication and authorisation mechanisms like OAuth.
• Knowledge using monitoring & logging tools to troubleshoot problems in a distributed network of systems.
• Excellent understanding of infrastructure as code and CI/CD pipeline management via Jenkins.
• Strong experience in back-end architectural and design patterns.

Where and how you'll work

This is a permanent position based in our Nottingham office.

We embrace a hybrid approach to work. You'll spend three days a week in the office (Tuesday-Thursday), with Monday and Friday being dedicated work-from-home days.

Our offices are designed to inspire and support you. At our Nottingham head office, you'll find an on-site gym, restaurant and dedicated Learning Loft. Our London office boasts a rooftop running track and coffee bar.

What’s in it for you

We invest in the growth of our people alongside our business. You will have extensive opportunities to learn and develop your career, including access to up to £5,000 in funding for external qualifications.

In addition to career development, our comprehensive benefits package is designed to grow with you, ensuring your wellbeing is prioritised at every stage of your career:

• Wealth & Future: Competitive pension and performance-based bonus schemes
• Holidays: Start with 25 days of annual leave, increasing with tenure. Need more? You have the option to buy 5 additional days.
• Health: Access premium care through our private medical insurance.
• Family Support: We champion your milestones with enhanced parental leave.

A full list of our benefits is available here.

What you should know about how we recruit

We pride ourselves on hiring the best people, not the same people. Building diverse and inclusive teams is the right thing to do and the smart thing to do. We want to work with top talent: whoever you are, whatever you look like, wherever you come from. We know it’s about what you do, not just what you say. That’s why we make our recruitment process fair and accessible.

We value diversity, inclusion and belonging at our core. We empower our associates to do great work by creating an inclusive culture—one that values diverse perspectives, fosters collaboration and encourages innovative ideas—and a place where associates of all backgrounds can thrive by bringing their most authentic selves to work. We call this our Culture of Belonging, and it rests at the heart of our business.

Our associate-led Business Resource Groups were created to help support our diverse population and include over 10 groups across our offices. Because each Business Resource Group is as unique as the population it serves, they offer a range of activities, networking opportunities, special events and learning programmes to associates.

If you require a reasonable adjustment, please contact ukrecruitment@capitalone.com All information will be kept confidential and will only be used for the purpose of applying a reasonable adjustment.

For technical support or questions about Capital One's recruiting process, please send an email to Careers@capitalone.com

Capital One does not provide, endorse nor guarantee and is not liable for third-party products, services, educational tools or other information available through this site.

Capital One Financial is made up of several different entities. Please note that any position posted in Canada is for Capital One Canada, any position posted in the United Kingdom is for Capital One Europe and any position posted in the Philippines is for Capital One Philippines Service Corp. (COPSSC).