Senior Software Development Engineer (.Net/C#)

The payments service team are the heart of Tesco Technology, serving 28 million+ shoppers in the UK and abroad. We deliver HTTP services that reliably manage payments at global scale, 24 hours a day every day. We also provide capabilities that detect and prevent fraud and build upon innovative technologies to reduce loss. At the core of our operation are the APIs that handle a variety of payment methods including cash, card and gift card across stores, at our fuel stations and online. We also support wallet behaviours, repeat payments, refunds and identity checks.

As a Senior Software Developer at Tesco, you are responsible for the entire development and support process for a software programme. Your applications make previously sophisticated tasks simple with the impact ranging from saving time, effort or money to re‑defining normal. The role focuses on day‑to‑day code writing; however, you will also lead on design and architecture as well as help mentor and develop those around you in the team.

About the role:

• The stack: .NET/C#, Cassandra, Docker, HAProxy, Azure DevOps.
• TDD and a “you build it, you run it” DevOps approach are also key parts of our engineering culture.
• Automation is a key area of focus for us.

You will be responsible for:

• Using your in-depth knowledge of .Net and the tool ecosystem to develop and implement scalable frontend systems.
• Producing test‑driven features and demonstrating your familiarity with the TDD cycle.
• Applying your understanding of software design principles to build well‑structured, maintainable systems.
• Working effectively with product stakeholders to communicate and translate needs into product improvements.
• Breaking down work so we can deliver value incrementally and manage risk on larger projects.
• Facilitating group discussions on system design and working with Product Managers to drive value.
• Supporting production systems, resolving, and learning from incidents.
• Sharing knowledge with the wider engineering community.
• Mentoring and developing others around you.
• Producing proof of concepts to evaluate new tools.

You will need:

• Experience using .Net/C# with an eagerness to take on new technologies.
• Experience with both SQL/NoSQL databases.
• Experience with cloud platform(s) (e.g. AWS, Azure, etc.).
• Experience of working in agile environments and TDD.
• Excellent interpersonal skills.
• Experience with Ecommerce payment systems would be a nice to have but is not crucial.

What's in it for you?

• Annual bonus scheme of up to 20% of base salary.
• Holiday starting at 25 days plus a personal day (plus Bank holidays).
• Private medical insurance.
• 26 weeks maternity and adoption leave (after 1 year’s service) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 4 weeks fully paid paternity leave.
• Free 24/7 virtual GP service, Employee Assistance Programme (EAP) for you and your family, free access to a range of experts to support your mental wellbeing.

About Us:

Our vision at Tesco is to become every customer’s favourite way to shop, whether they are at home or out on the move. Our core purpose is ‘Serving our customers, communities and planet a little better every day’. Serving means more than a transactional relationship with our customers. It means acting as a responsible and sustainable business for all stakeholders, for the communities we are part of and for the planet. We are proud to have an inclusive culture at Tesco where everyone truly feels able to be themselves. At Tesco, we not only celebrate diversity, but recognise the value and opportunity it brings. We’re committed to creating a workplace where differences are valued, and make sure that all colleagues are given the same opportunities.

We’re proud to have been accredited Disability Confident Leader and we’re committed to providing a fully inclusive and accessible recruitment process. We’re a big business and we can offer a range of diverse full‑time & part‑time working patterns across our many business areas, which means that we can find something that works for you. We work in a more blended pattern – combining office and remote working. Our offices will continue to be where we connect, collaborate and innovate. If you are applying internally, please speak to the Hiring Manager about how this can work for you – Everyone is welcome at Tesco.