Software Development Engineer III (.NET/Java)

Tesco UK; Greater London; On-site; GBP 80,000 - 110,000; Full time

Benefits offered by this job

Flexible working

Office locations in London

Job summary

Tesco Technology is seeking a Senior Software Developer to join the payments service team. You will own end-to-end delivery, mentor teammates, and shape architecture for high‑impact, business‑critical systems.

The stack includes .NET/C#, Java, Cassandra, Docker, HAProxy, and Azure DevOps. We embrace TDD and a DevOps culture with automated testing and deployment.

Qualifications

• Experience with .NET/C# and/or Java in commercial software projects.
• Strong exposure to SQL and NoSQL databases.
• Familiar with cloud platforms (AWS/Azure).
• Experience in agile environments and TDD.

Responsibilities

• Develop and implement scalable frontend/back-end features using .NET/C# and Java.
• Produce test-driven features and demonstrate TDD discipline.
• Apply solid software design principles to build maintainable systems.
• Collaborate with product stakeholders to translate needs into product improvements.
• Break down work for incremental delivery and risk management on large projects.
• Lead system design discussions with Product Managers to drive value.
• Support production systems, resolve incidents, and learn from them.
• Share knowledge with the wider engineering community and mentor others.
• Create proof-of-concepts for evaluating new tools.

Skills

.NET/C#

Java

SQL/NoSQL

Cloud platforms

Agile

TDD

Interpersonal skills

Tools

Docker

HAProxy

Azure DevOps

Job description

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. 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. Our scale and workloads demand that we continuously improve our approaches to testing and deployment.

• 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.

• Experience using .Net/C# and/or Java 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.

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. And if you’re interested in joining our team but don’t tick every box, don’t let that hold you back from applying.