Senior Java Engineer - Quote API (London OR WGC)

Tesco UK; Welwyn Garden City; Hybrid; GBP 50,000 - 70,000; Full time

Job summary

A leading retail company in Welwyn Garden City is seeking a skilled software engineer with expertise in Java to design and implement complex, scalable systems. The ideal candidate will have experience with cloud platforms and databases, will foster collaboration within a diverse team, and will follow agile development practices. This role offers flexible work patterns to support a work-life balance.

Benefits

Flexible working patterns

Inclusive company culture

Continuous learning opportunities

Qualifications

• Strong experience with Java 8+.
• Hands-on experience with cloud platforms.
• Proficiency with both SQL and NoSQL databases.

Responsibilities

• Design and implement end-to-end systems using JVM expertise.
• Translate product requirements into maintainable code.
• Write test-driven features following TDD and BDD.

Skills

Java 8+

Cloud platforms (Azure, AWS)

SQL databases

NoSQL databases

Agile methodologies

Reactive programming

Job description

Overview

Join the team behind Price Service—a mission-critical HTTP API powering pricing and promotions across all of Tesco’s channels. From tills to websites and everything in between, our work touches the lives of over 28 million UK shoppers every week, with global reach on the horizon.

We’re building a robust, internet-facing API that runs both in stores and in the cloud, designed to support future innovation at scale. This means solving complex distributed systems challenges, ensuring high availability, and optimizing performance. Concepts like the CAP theorem aren’t just theory here—they’re part of our daily engineering conversations.

Our stack includes Java, Vert.x, RxJava, Groovy, Couchbase, and Kafka, running on Azure with a fully automated CI/CD pipeline. We follow Agile principles, adapting Kanban and other methodologies to fit the team’s needs. Collaboration is at the heart of our culture—pair programming is common, and all code is reviewed via GitHub.

Responsibilities

• Design and implement end-to-end systems using your deep JVM and java ecosystem expertise.
• Translate product requirements into well-structured, maintainable code.
• Write test-driven features and follow the TDD and BDD cycle.
• Apply SOLID principles and cohesive design to build scalable software.
• Collaborate with product stakeholders to shape and refine features.
• Support production systems, resolve incidents, and conduct root cause analysis.
• Mentor and support fellow engineers, fostering a culture of continuous learning.
• Share knowledge across the wider engineering community.
• Prototype and evaluate new tools and technologies.

Qualifications

• Strong experience with Java 8+.
• Hands-on experience with cloud platforms (Azure, AWS, etc.).
• Proficiency with both SQL and NoSQL databases.
• Proven ability to scale systems effectively.
• Familiarity with Agile methodologies (Scrum, Kanban, Waterfall).
• Exposure to reactive programming paradigms.
• Bonus: Experience with eCommerce or search systems.

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. For further information on the accessibility support we can offer, please click here.

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.