Senior Developer

Senior Developer (Full time) Salary £56,312 - £65,697 (dependent on experience) - Hybrid working

Ordnance Survey is the national mapping agency for Great Britain, providing world‑class geospatial data and services that power innovation, support national infrastructure, and help people make better decisions every day. We’re passionate about using cutting-edge technology to solve real-world problems—and we’re looking for talented people to join our mission.

As a Senior Developer, you’ll take a leading role in designing, building and delivering high‑quality, AI‑driven software solutions. You’ll guide technical decision-making and champion best practices across the engineering lifecycle. This is a chance to work with modern cloud and AI technologies at scale, while influencing how integrated digital services are delivered across Ordnance Survey.

• Leading the technical delivery of complex projects, working closely with architects, delivery managers, and stakeholders

• Coaching, mentoring, and supporting engineers to continually enhance capability across the team

• Operating and improving production services to ensure robustness, resilience, and reliability

• Sharing best practices and identifying training opportunities to upskill the wider engineering community

• Communicating goals, progress, and technical challenges clearly across teams

• Providing line management support for Engineers and Associate Engineers (as required)

• Proven experience as a senior developer with strong backend engineering expertise

• Deep knowledge of Python, SQL, and cloud-based AI frameworks (e.g., Databricks, Azure AI Services)

• Hands-on experience with Azure development—Azure Dev Ops, Git, CI/CD, Entra , and Azure Services

• Solid understanding of software architecture, design patterns, and agile delivery practices

• Experience with geospatial data, REST APIs, JSON, and spatial engines (e.g., Apache Spark)

• Experience with Generative AI, including LLMs, RAG, and prompt/context engineering

• A passion for continuous improvement and delivering high‑quality solutions

We want you to love what you do. That is why our benefits package rewards a job well done. Check out how we support and invest in our employees by

• Salary £56,312 - £65,697 (dependent on experience)

• Performance related bonus up to 10%

• A competitive pension scheme (OS contributes up to 12.07%)

• 28 days annual leave in addition to bank holidays on joining, (3 taken over Christmas) increasing by one day per year, to a maximum of 5 years

• Enhanced family leave, including up to 12 weeks paid partner (paternity) leave

• Free subscription to OS Maps

• Access to online learning platforms

• Coaching and Mentoring schemes

• Plus, a suite of excellent additional perks and benefits

At OS, we believe looking after your health and wellbeing means more than posters and events. We empower you to manage your work and life the way you need it by offering things like

• An extra days’ leave for each year you work, up to 33 days

• Employee Assistance Programme

• Hybrid working

• Free onsite parking at our modern HQ in Southampton

• We adopt flexible working and can consider different working hours dependent on the role and your personal circumstances

• Eyecare Vouchers

• OS Explorers Nursery discount

• Cycle to Work scheme

• We believe that as a company we should give back wherever we can, so we give you 1 day a year to volunteer for charities that are important to you, as well as offering a match funding scheme

We embrace a hybrid working model  have a fantastic HQ in Southampton, Hampshire where you will be based and required to spend 2-3 days a week.

OS conducts pre-employment checks for anyone made an offer of employment, including identity, right to work, employment history and criminal record checks (via Disclosure & Barring Services (DBS).

Some of our roles may require additional security vetting. We will advise candidates during the recruitment process if additional vetting may be required for that specific role.

We cannot offer sponsorship for this role, so you must have the right to work in the UK without employer sponsorship.

Closing date: 19…