Senior Software Development Engineer (.NET)
Confirmed on the employer's own hiring board on Oct 24, 2026. First seen by Alion on Oct 23, 2026. Tesco scores A on the Alion truth index.
About the role
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. 100M+ transactions and billions of events per day, a billion pounds every week.
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. As you might expect, the role focuses on day-to-day code writing however, you'll also get to lead on design and architecture as well as help mentor and develop those around you in the team!
If you like to work on high-impact business-critical systems then this could be the team for you!
The stack; .NET/C#, Java, Cassandra, Docker, HAProxy, Azure DevOps, Postgres. TDD and a 'you build it, you support it' DevOps approach are also key parts of our engineering culture. Automation is a key area of focus for us. Our scale and workloads demand that we continuously improve our approaches to testing and deployment.
What is in it for you
We’re all about the little helps. That’s why we make sure our Tesco colleague benefits package takes care of you - both in and out of work. Click Here to find out more!
- 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 (12 months service required at the qualifying date) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 6 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.
The above information is a shortened summary, refer to our policies for full details
You will be responsible for
- Using your in-depth knowledge of .Net and the tool ecosystem to develop and implement scalable frontend systems.
- Translating requirements into tasks & code.
- Producing test-driven features and demonstrating your familiarity with the TDD cycle.
- Applying your understanding of cohesion and the SOLID principles to build well structured, maintainable software.
- Working effectively with product stakeholders to communicate and translate needs into product improvements.
- Leading 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.
About us
You might know us as a supermarket, technology company or even for our award-winning mobile network. Truth is, we’re all of those things, and much more. Our colleagues work with one goal in mind, helping to make every day a little better for our customers, colleagues and communities all over the world. No two customers are the same, neither are our colleagues.
At Tesco, we champion a balance that lets you thrive both in and out of work. Spend 60% of your week collaborating with colleagues at our office locations or local sites and the rest remotely. Whether you're just kicking off your career, juggling passions, or navigating big life events, we're here to support you. We always welcome a conversation about flexible working, so talk to us throughout your application about how we can support.
We're proud to be an accredited Disability Confident Leader, where everyone’s welcome. That’s why we commit to providing a fully inclusive and accessible recruitment process. If you need support with your application, click here for more information. And if you're interested in joining our team but don't tick every box, don't let that hold you back from applying.
When you join us in this role, you'll be employed by Tesco Stores Limited, the Tesco legal entity responsible for your employment.