Staines

SC Cleared Senior Developer

Posted on Wednesday, 22nd July 2026

Consultancy
Staines
£65k - 80k per year
Permanent

Join a Leading Digital Consultancy as a Senior Developer with Security Clearance

About Our Client

Our Client is a renowned, multi-award-winning digital consultancy specialising in delivering innovative technology solutions across various UK government departments. Their impactful work reaches over 40 million citizens, demonstrating a strong commitment to public service. Known for fostering a collaborative and forward-thinking culture, they champion innovation, professional growth, and a supportive work environment. Their reputation for delivering secure, scalable digital solutions makes them an inspiring place to develop your career.

Role Overview

Due to strategic growth and evolving project demands, our Client is seeking a highly skilled Senior Developer to join their dynamic agile delivery squad. This is a crucial role involved in creating and enhancing large-scale, secure digital services for a government client. The position offers an exciting opportunity to influence public sector digital transformation by working on cloud-native applications, legacy modernisation, and implementing best practice security protocols within a Microsoft Azure environment.

Key Responsibilities

  • Develop, maintain, and optimise full-stack applications utilizing .NET Core and Python
  • Architect and build RESTful APIs aligned with microservices and API-first strategies
  • Integrate secure DevSecOps practices into CI/CD pipelines using Azure DevOps
  • Lead code reviews to ensure high standards of security, quality, and functionality
  • Contribute to legacy system modernisation from older Windows/.NET Framework environments
  • Produce comprehensive technical documentation and architectural artefacts
  • Ensure all solutions meet WCAG AA accessibility standards
  • Collaborate closely with architects, senior developers, and delivery managers within an Agile framework

Essential Skills & Experience

  • Proven hands-on experience with C# including OOP, design patterns, and SOLID principles
  • Extensive professional experience with .NET Core 10.0 and .NET Framework 4.8
  • Proficiency in Python including dependency management and service development
  • Strong understanding of REST API design and lifecycle management
  • Practical experience with Azure cloud services, DevOps pipelines, and Infrastructure as Code (Terraform/Bicep)
  • Solid background in secure development practices, including SAST/DAST and OWASP standards
  • Ability to work effectively in an agile environment with excellent collaboration skills
  • British nationality or 5+ years’ UK residency, with SC clearance (or eligibility to obtain it)

Desirable Skills & Experience

  • Experience working with legacy Windows technologies such as WPF, Win32, or COM
  • Knowledge of geospatial data formats like GeoJSON, MBTiles, or GML
  • Familiarity with secure design standards aligned with NCSC guidelines
  • Previous experience within the UK public sector or government digital services projects
  • Geospatial tooling and data pipeline skills in Python

Location & Working Arrangements

The role is based on-site in Taunton, Somerset, with a minimum of two days per week in the office. Flexibility around remote working may be discussed.

Next Steps

If you are a committed and technically proficient Senior Developer with active SC clearance or eligible, and you are eager to play a pivotal role in government digital transformation, we encourage you to submit your CV outlining your relevant experience. This is an excellent opportunity to contribute to impactful projects within a respected organisation committed to innovation and excellence in public service.

Apply for this role