Senior Developer

Consortium of Lesbian, Gay, Bisexual and Transgender Voluntary and Community Organisations Limited; Southampton; Hybrid; GBP 56,000 - 66,000; Full time

Job summary

A community-focused organization in Southampton seeks a Senior Developer to lead complex projects and mentor junior engineers. This role requires deep knowledge of Python, SQL, and cloud-based AI frameworks, offering a salary between £56,312 and £65,697. The position offers hybrid working, with a requirement to spend 2-3 days per week in the office, alongside a suite of benefits including a performance-related bonus and comprehensive leave options. Diversity is a priority, encouraging applications from underrepresented groups.

Benefits

Performance related bonus up to 10%

Competitive pension scheme

28 days annual leave

Free subscription to OS Maps

Access to online learning platforms

Qualifications

• Proven experience as a senior developer with strong backend engineering expertise.
• Deep knowledge of Python, SQL, and cloud-based AI frameworks.
• Hands-on experience with Azure development—Azure DevOps, Git, CI/CD.

Responsibilities

• Leading the technical delivery of complex projects.
• Coaching and mentoring engineers.
• Providing line management support for Engineers.

Skills

Python

SQL

Cloud-based AI frameworks

Geospatial data

REST APIs

Generative AI

Tools

Azure DevOps

Git

CI/CD

Apache Spark

Job description

Overview

Senior Developer role with salary range £56,312 - £65,697

Hybrid working with a requirement to spend 2-3 days per week in Southampton

Involves leading complex projects and mentoring junior engineers

Requires expertise in Python, SQL, cloud-based AI frameworks, and geospatial data

Salary includes performance-related bonus up to 10%

Offers comprehensive benefits including pension scheme, annual leave, and flexible working arrangements

Organisation is committed to diversity and encourages applications from underrepresented groups

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

About Ordnance Survey

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.

About the Role

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.

What You Will Be Doing

• 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)

What We Are Looking For

• 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 DevOps, Git, CI/CD, Entra ID RBAC, 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

The Rewards

We want you to love what you do. That is why our benefits package rewards a job well done.

• 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
• 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
• 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

Location

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

Security

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

Closing date: 19 February 2026 23:59pm

Interviews are scheduled to take place from MS Teams.

We are happy to consider any reasonable adjustments that people may need during the recruitment process, and you will be asked whether you require any during the application process.

Research indicates that women, individuals with disabilities, LGBTQ+ community members, neurodiverse individuals, and people from ethnic minority backgrounds often hesitate to apply for jobs unless they meet every single qualification. At Ordnance Survey, we are dedicated to fostering a diverse, inclusive, and genuine workplace where everyone can thrive. If you\'re enthusiastic about this role but your experience doesn\'t perfectly match every qualification in the job description, we encourage you to apply anyway. You might be the ideal candidate for this or other roles within Ordnance Survey.

If this job opportunity is not suitable, then check out the other LGBT friendly jobs across UK!