Senior GIS Developer

As a Senior GIS Developer, you will play a strategic role in shaping and delivering advanced GIS solutions that harness the power of spatial data to support critical business operations. You’ll lead the design, development, and optimisation of GIS applications using the Esri ArcGIS platform, while leveraging your advanced skills in .NET, Python, and SQL to support integration, automation, and data modelling efforts.

Your role will involve collaborating closely with GIS Platform Lead, Architects, and stakeholders to align GIS capabilities with business goals. You’ll also mentor junior developers, contribute to Agile delivery processes, and champion best practices across the team.

What you’ll be doing as a Senior GIS Developer

• GIS Application Development: Design, develop, and maintain complex GIS applications using Esri ArcGIS to support both strategic and operational business needs.
• Data Integration & Modelling: Lead the integration of spatial and non-spatial data using SQL and Python to drive high-performance solutions that align with enterprise systems.
• Automation & Efficiency: Develop and optimise Python scripts and tools to automate geospatial workflows and improve data processing efficiency across the team.
• Collaboration: Engage with architects, analysts, and business stakeholders to gather and refine requirements, ensuring that GIS solutions meet evolving needs.
• Agile Delivery: Actively contribute to Agile ceremonies, including planning, retrospectives, and stand-ups, ensuring delivery of high-quality features and technical improvements.
• Quality Assurance: Review code, troubleshoot issues, and ensure applications are secure, scalable, and resilient in line with Thames Water standards.
• Mentorship & Leadership: Support junior team members through coaching and mentoring, fostering a collaborative and skilled GIS development team. You will be proactive in thinking beyond the obvious, bringing fresh ideas to the table and comfortable leading innovation, and not afraid of a challenge.

Base Location: Reading, Clearwater Court – Hybrid. (1–2 days a week in the office)

Working Pattern: Full Time/36 Hours per week.

What you should bring to the role:

Essential Experience:

• Experience in GIS application development, with in-depth expertise using Esri ArcGIS technologies.
• Advanced skills in .NET, Python, and SQL, with a strong background in building and optimising data-driven GIS solutions.
• Deep understanding of spatial databases, geospatial data structures, and integration within enterprise systems.
• Experience in Agile delivery, working in cross-functional teams, and participating in development cycles.
• Strong interpersonal and communication skills to effectively engage with technical and non-technical stakeholders.

Essential Technical Skills & Qualifications:

• Demonstrated experience designing and maintaining complex GIS applications.
• Strong command of automation scripting (Python) and database development.(SQL) particularly in spatial contexts.
• Proficiency in .NET for GIS-related application development.

Desirable Skills & Qualifications:

• Experience with cloud-based GIS platforms (e.g., AWS, Azure).
• Familiarity with enterprise data integration tools and services.
• Experience mentoring junior developers and leading knowledge-sharing initiatives
• Bachelor’s or Master’s degree in GIS, Computer Science, Geography, or a related discipline.

What’s in it for you?

• Competitive salary up to £70,000 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.
• 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.