Senior Software Engineer | London, UK

Senior Software Engineer

This is an exciting opportunity for an experienced engineer to help shape modern digital experiences at scale. You will play a central role in designing and delivering modular, high-performance applications using React, TypeScript and backend-for-frontend patterns in a fast-paced environment, while helping to strengthen engineering standards across the team.

You will work across micro frontends, scalable platform architecture, secure engineering practices, continuous delivery and AI-enabled engineering in a collaborative environment. This is a hands-on senior role where you'll help improve reliability, quality and maintainability, while mentoring other engineers and contributing to the evolution of our engineering practices.

What you'll be doing

• Design and build scalable, modular applications using React, TypeScript and micro frontend architecture.
• Develop backend-for-frontend services with NestJS to support seamless client and server integration.
• Improve engineering quality through modern CI/CD, automated testing, automation and secure development practices.
• Collaborate with engineers, architects, product and platform teams to solve complex delivery and integration challenges.
• Mentor other engineers, share knowledge, and help drive continuous improvement across the team.
• Use GenAI tools responsibly to support software design, delivery, problem solving and developer productivity, while maintaining strong engineering judgement, quality and security standards.

What we're looking for

Essential skills and experience

• Strong experience in a Senior Software Engineer role, ideally delivering modern web applications.
• Hands-on expertise in React and TypeScript, including component design, state management and performance optimisation.
• Experience designing and building micro frontend architectures, including module federation and independently deployable services.
• Experience with NestJS and backend-for-frontend patterns.
• Good knowledge of CI/CD, automated testing and modern software delivery practices.
• Understanding of secure engineering principles, web security best practices and resilient application design.
• Strong collaboration and communication skills, with experience mentoring and supporting other engineers.

Nice to have

• Experience with cloud-native environments such as GCP or Azure.
• Familiarity with OAuth2, OpenID Connect, SAML or similar authentication and authorisation approaches.
• Experience with Docker, Kubernetes, Helm, Terraform or related tooling.
• A proactive approach to continuous improvement, knowledge sharing and raising engineering standards.
• Experience using, or enthusiasm for using, GenAI tools to improve engineering effectiveness, collaboration and delivery outcomes.

What will help you succeed in this role

• Proactive and adaptable in a fast-paced engineering environment.
• Self-driven, with strong ownership and delivery focus.
• Collaborative and supportive, with a mentoring mindset.
• Pragmatic, curious, eager to learn, with the ability to break down and solve complex problems.
• Committed to continuous improvement in engineering quality and delivery.
• Passionate about GenAI.

If this role excites you but your experience doesn't align perfectly with every requirement, we'd still love to hear from you.

Admiral: Where You Can

We take pride in being a diverse and inclusive business. It's a place where you can Be You, and show up as you are. We're committed to fostering a people-first culture where everyone is accepted, supported, and empowered to be brilliant. You can, Grow And Progress at a pace and direction that suits you, Make A Difference for our customers and each other, and Share in Our Future with all colleagues eligible for up to £3,600 of free shares each year after one year of service.

Everyone receives 33 days holiday (including bank holidays) when they join us, increasing the longer you stay with us, up to a maximum of 38 days (including bank holidays). You also have the option to buy or sell up to an additional five days of annual leave.

We're proud of our people-first culture. In fact, we've been recognised as a Great Place to Work for Women, a Great Place to Work for Wellbeing, and an overall Great Place to Work for over 25 years! We're fully committed to making sure your progression is not slowed or halted by barriers related to race, gender, age, sexuality or any of the protected characteristics.

Our fantastic benefits make sure our colleagues have a great work-life balance; You can view some of our other key benefits here .

Disability Confident Leader

As a Disability Confident Leader, for candidates with a disability or long-term health condition, that opt into the Disability Confident scheme, we'll invite a fair and proportionate number of applicants that meet the essential requirements of the role to the first stage of our selection process.

If you need any adjustments or support with your application or during the recruitment process, just let us know. Please do email us or contact us on 07386666328. This number is dedicated to supporting candidates that require reasonable adjustments or support during the application process.

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