Senior C# Developer

Triad Group Plc; Greater London; Hybrid; GBP 39,000 - 65,000; Full time

Benefits offered by this job

Private healthcare with Bupa

Gym membership support

25 days annual leave

Matched pension contributions (5%)

Job summary

Triad Group Plc is seeking a Senior C# Developer to design, develop, and maintain software using .NET Core and related web frameworks. You will work with cross-functional teams to meet client requirements and deliver high-quality code for public sector and national-scale projects.

As a consultant, you will shape the technological landscape, delivering digital solutions across sectors while enjoying autonomy and opportunities to grow within Triad's 35-year history.

Qualifications

• 8+ years of proven experience as a C# Developer or similar software development role.
• Proficiency in C# and .NET Core, with strong OOP understanding.
• Experience with Agile or Scrum methodologies.
• Familiarity with relational databases and ORM frameworks.

Responsibilities

• Design, develop, and maintain C# applications and systems.
• Write clean, efficient code following standards.
• Collaborate with cross-functional teams to deliver solutions.
• Participate in code reviews and provide feedback.
• Troubleshoot and optimise performance; document code.

Skills

C#

.NET Core

OOP

Agile

Git

SQL

AI tools

Education

Degree in related field

Tools

SQL Server

Entity Framework

Git

Job description

Based at client locations, working remotely, or based in our Godalming or Milton Keynes offices.

Salary Up to £65k plus excellent company benefits.

Given the nature of the work and timescales, candidates must hold an active SC clearance.

About Us

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.

• Glassdoor score of 4.5
• 92% of our staff would recommend Triad to a friend
• 100% CEO approval

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

Role Summary

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, Blazor, 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.

Key Responsibilities

• 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.

Skills and Experience

• 8+ years of 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 (e.g., SQL Server, MySQL, PostgreSQL) and ORM frameworks (e.g., 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 version control systems (e.g., 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.

Triad’s Commitment to You

• Continuous Training & Development: Access to top-rated Udemy Business courses.
• Work Environment: Collaborative, creative, and free from discrimination.
• 25 days of annual leave, plus bank holidays.
• Matched pension contributions (5%).
• Private healthcare with Bupa
• Gym membership support or Lakeshore Fitness access.

What Our Colleagues Have to Say

Please see for yourself on Glass Door and our “Day in the Life” videos at the bottom of our Careers Page.

Our Selection Process

After applying for the role, our in-house talent team will contact you to discuss Triad and the position. If shortlisted, you will be invited for:

• Initial call with the Internal Recruitment Team
• Technical test
• Technical interview with one of our Senior Developers and Technical Architects
• Interview with our CTO for career review and cultural fit

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

Other information

If this role is of interest to you or you would like further information, please submit your application now!

Triad is an equal opportunities employer and welcomes applications from all suitably qualified people regardless of sex, race, disability, age, sexual orientation, gender reassignment, religion, or belief.

We are proud that our recruitment process has been recognised as inclusive and accessible to disabled people who meet the minimum criteria for any role. We are a signatory on the Tech Talent Charter that aims to bring industries and organisations together to drive greater inclusion and diversity in technology roles, in addition as a Disability Confident Leader.