Senior C# Developer

See for yourself some of the work that makes us all so proud:

• Helping law enforcement with secure intelligence systems that keep the UK safe
• Supporting the UK's national meteorological service in leveraging supercomputers for next-level weather forecasting
• Assisting the British government department that is responsible for the safety of consumer products, with systems to track unsafe products
• Powering systems that help the government monitor and reduce greenhouse gas emissions from commercial transport, * Design, develop, and maintain C# applications, components, and systems.
• Write clean, efficient, and maintainable code following best practices and coding standards.
• Collaborate with cross-functional teams including designers, product managers, and other developers to understand project requirements and deliver high-quality solutions.
• Participate in code reviews to ensure code quality and provide constructive feedback to peers.
• Troubleshoot and debug software applications to resolve issues and optimise performance.
• Stay updated with the latest trends and technologies in web development and software engineering.
• Document code and technical specifications.
• Contribute to the continuous improvement of development processes and methodologies.

• 8+ years proven experience as a C# Developer or similar software development role.
• Proficiency in C# programming language and .NET framework including .NET Core
• Strong understanding of object-oriented programming principles.
• Experience with software development methodologies such as Agile or Scrum.
• Familiarity with relational databases (eg, SQL Server, MySQL, PostgreSQL) and ORM frameworks (eg, Entity Framework).
• Excellent problem-solving and analytical skills.
• Good communication and collaboration abilities.
• Ability to work independently and in a team environment.
• Strong attention to detail and dedication to delivering high-quality work.
• Experience with Front End technologies (HTML, CSS, JavaScript).
• Experience with version control systems (eg, Git is preferred).
• Experience using AI-assisted development tools such as Claude, GitHub Copilot or similar to support coding, debugging, documentation and delivery, with an understanding of responsible and secure AI use.

Qualifications & Certifications

• A degree or equivalent qualification related to the area you work in - Desirable
• Due to the nature of this position, you must be willing and eligible to achieve a minimum of SC clearance. To be eligible, you must have been a resident in the UK for a minimum of 5 years and have the right to work in the UK.

London - £60k - £65k per annum + Company excellent benefits Full Time Posted by: Triad Group Plc Posted: Wednesday, 15 July 2026 Applicants must be eligible to work in the specified location, * 25 days of annual leave, plus bank holidays.

• Matched pension contributions (5%).
• Private healthcare with Bupa
• Gym membership support or Lakeshore Fitness access.
• Perkbox membership.
• Cycle-to-work scheme., 2. Technical test

3. Technical interview with one of our Senior Developers and Technical Architects
4. Interview with our CTO for career review and cultural fit

We aim to complete interviews and progress candidates to offer stage within 2-3 weeks of the initial conversation.

Triad Group Plc is an award-winning digital, data, and solutions consultancy with over 35 years' experience primarily serving the UK public sector and central government. We deliver high-quality solutions that make a real difference to users, citizens and consumers. At Triad, collaboration thrives, knowledge is shared, and every voice matters. Our close-knit, supportive culture ensures you're valued from day one. Whether working with cutting-edge tech or shaping strategy for national-scale projects, you'll be trusted, challenged, and empowered to grow. We nurture learning through communities of practice and encourage creativity, autonomy, and innovation. If you're passionate about solving meaningful problems with smart and passionate people, Triad could be the place for you., Triad Group Plc is seeking a skilled and experienced Senior C# Developer to join our dynamic team. As a Senior Developer, you will be responsible for designing, developing, and maintaining software applications using .NET Core with associated web frameworks (React, Blazer, Angular). You will collaborate with cross-functional teams to understand project requirements, propose solutions, and deliver high-quality code that meets our clients' needs. As a consultant at Triad, you will play a pivotal role in shaping the technological landscape, defining, designing, and delivering digital solutions across public, private, and third sectors. Operating within a Company that values autonomy and creativity, you will be at the forefront of solving complex problems, contributing to a culture of innovation that has been the hallmark of Triad's 35-year success story.