Full Stack Developer

We are looking for a highly motivated and technically skilled Full Stack Developer to join our Customer Technology & Platforms team. In this role, you will design, develop, and support high-quality software solutions that enhance the digital experience for millions of Thames Water customers.

You’ll play a critical role in building modern microservices and APIs, using cutting-edge technologies to drive the evolution of our customer-facing website and backend systems. Working in a highly collaborative agile team, you’ll help deliver scalable and secure solutions that make a real impact.

This is an exciting opportunity to work with cloud-native tools (especially Azure, Docker, and Kubernetes), transforming how customers interact with Thames Water every day.

What you’ll do as a Full Stack Developer
Software Development & Delivery:

• Design and develop high-quality code to support digital products across web and backend systems.
• Build scalable APIs and microservices to support seamless customer interactions.
• Write secure, well-tested, and maintainable code using .NET Core and related technologies.
• Implement containerised solutions with Docker and orchestrate deployments using Kubernetes.

Agile Collaboration & DevOps Practices:

• Participate in agile ceremonies including sprint planning, retrospectives, daily stand-ups, and pair programming.
• Apply agile technical practices such as Test-Driven Development (TDD), CI/CD, and continuous testing.
• Collaborate with developers, product owners, and designers to deliver working software every sprint.
• Break down complex requirements into smaller, shippable units of value.

Platform Support & Continuous Improvement:

• Contribute to the development of reusable components and shared libraries to improve team efficiency.
• Identify areas for technical improvement and recommend innovative solutions to increase performance and reliability.
• Maintain and enhance existing codebases with a focus on long-term support and evolution.
• Contribute to knowledge sharing, team mentoring, and continuous learning.

Security, Compliance & Monitoring:

• Ensure applications comply with industry standards and internal security guidelines.
• Leverage cloud-native monitoring tools to ensure high availability and system health.
• Build secure APIs and services that meet data protection and compliance requirements.

Base location – Hybrid – Clearwater Court, Reading
Working pattern – 36 hours, Monday to Friday

What you should bring to the role:
The essential criteria to help you succeed in this role is:
Essential Experience:

• Experience as a Full Stack Developer, ideally in customer-facing website projects.
• Demonstrated success in delivering production-ready microservices and APIs.
• Experience in containerised application development and orchestration (Docker, Kubernetes).
• Strong understanding of Agile software delivery practices and DevOps principles.
• Excellent problem-solving and collaboration skills in a fast-paced team environment.

Essential Technical Skills & Qualifications:

• .NET Core, C#, RESTful APIs, Microservices Architecture
• js and modern JavaScript
• Microsoft Azure, Docker, Kubernetes
• Agile tools and practices (Scrum, TDD, CI/CD, Azure DevOps)

Additional skills and experiences would be great to have/bring:
Desirable Experience:

• Experience working with website content management solutions.
• Exposure to designing integration solutions across cloud and on-prem environments.
• Previous work in regulated industries or large customer bases.

Desirable Technical Skills & Qualifications:

• Familiarity with automated testing tools and software quality frameworks.
• Experience building and maintaining reusable UI components.
• Understanding of secure coding practices and API security.
• Experience writing technical documentation and contributing to shared knowledge bases.

What’s in it for you?

• Competitive salary up to £80,000 per annum, depending on experience.
• Annual Leave - 26 days holiday per year, increasing to 30 with the length of service. (plus bank holidays).
• Generous Pension Scheme through AON.
• Performance-related pay plan directly linked to both company and individual performance measures and targets.
• Access to lots of benefits to help you take care of you and your family’s health and wellbeing, and your finances – from annual health MOTs and access to physiotherapy and counselling to Cycle to Work schemes, shopping vouchers and life assurance.

Find out more about our benefits and perks

Who are we?
We’re the UK’s largest water and wastewater company, with more than 16 million customers relying on us every day to supply water for their taps and toilets. We want to build a better future for all, helping our customers, communities, people, and the planet to thrive. It’s a big job and we’ve got a long way to go, so we need help from passionate and skilled people, committed to making a difference and getting us to where we want to be in the years and decades to come.

Learn more about our purpose and values

Working at Thames Water
Thames Water is a unique, rewarding, and diverse place to work, where every day you can make a difference, yet no day is the same. As part of our family, you’ll enjoy meaningful career opportunities, flexible working arrangements and excellent benefits.
If you’re looking for a sustainable and successful career where you can make a daily difference to millions of people’s lives while helping to protect the world of water for future generations, we’ll be here to support you every step of the way. Together, we can build a better future for our customers, our region, and our planet.

Real purpose, real support, real opportunities. Come and join the Thames Water family. Why choose us? Learn more.

We’re committed to being a great, diverse, and inclusive place to work. We welcome applications from everyone and want to ensure you feel supported throughout the recruitment process. If you need any adjustments, whether that’s extra time, accessible formats, or anything else just let us know, we’re here to help and support.

When a crisis happens, we all rally around to support our customers. As part of Team Thames, you’ll have the opportunity to sign up to support our customers on the frontline as an ambassador. Full training will be given for what is undoubtedly an incredibly rewarding experience. It’s also a great opportunity to learn more about our business and meet colleagues.

Disclaimer: due to the high volume of applications we receive, we may close the advert earlier than the advertised date, so we encourage you to apply as soon as possible to avoid disappointment.