Senior Software Engineer

This role strengthens the organisation's technical foundations by enabling teams with robust platform capabilities, modern engineering standards, and clear documentation. Through mentoring engineers, improving tooling, and championing resilient, maintainable architectures, you raise overall engineering effectiveness and accelerate delivery of customer-facing value. Your influence supports both near-term product outcomes and long-term strategic growth, while fostering a culture of quality, innovation, and responsible use of AI-enhanced development tools.

How you'll contribute

• You will be working with our engineers to design and deliver new platform capabilities.

• Hands-on programming work - coding, pair programming, mobbing, testing and shipping functionality.

• You will be acting as a technical lead and working with Principal Engineers and Lead Engineers to design and build out platform capabilities for other teams to use.

• Leading complex features from conception to completion with high quality and minimal oversight.

• Mentoring less-experienced engineers and conducting thorough reviews of code and documentation.

We're looking for these essential skills

• Writing and maintaining tests throughout the SDLC at all levels.

• Implementing Continuous Delivery practices to ship quality code safely and in a timely manner.

• Contributing to system architecture decisions, ensuring resiliency, scalability and maintainability.

• Enabler mindset - enjoys making other engineers better through tooling, patterns, documentation, and sensible standards. Honest, pragmatic, and open to feedback.

• Experience with observability, metrics, CI/CD, data analysis, or shared developer tooling. No on-call.

Do you have experience in Data analysis skills?, * Navigating Platform-as-a-Service (PaaS) cloud environments, we use Azure.

• .NET/C# or Polyglot engineers with pragmatic system thinking - interested in abstracted system-level understanding over any specific tech stack

• Contributing to engineering principles and technical direction across teams.

• Experience recruiting and onboarding engineers.

What's in it for you?

• 26 days holiday, rising to 30 with service
• A holiday buy scheme (up to 5 extra days)
• Double matched pension, with up to 14% from NewDay
• Generous annual performance bonuses
• Private medical insurance with Bupa, including mental health support and cancer care
• 26 weeks paid maternity, adoption and shared parental leave
• Free breakfast and lunch in the office every day, provided by our in-house chefs

…and more, which you can explore here !

NewDay is one of the UK's leading digital consumer finance providers. We're on a mission to help people move forward with credit, supporting over 6 million customers every day! You may have heard of our own brand credit cards like Aqua, Marbles or Bip, or our co-branded retail credit cards with John Lewis & Partners, Argos and AO .