Focus Group

Telecoms, IT, and cybersecurity solutions provider

C# .NET Developer

Backend EngineeringUpdated on Nov 13

Full-time£30k - £50k /yr

About the Job

Requirements

Strong commercial experience with C# and .NET.
Experience developing with WinForms and MVC.
Good understanding of SQL and database development.
Experience with HTML5, CSS and Bootstrap.
Experience developing and consuming APIs.
Familiarity with Postman.
Ability to write and maintain unit tests.
Experience using Git and branching strategies.
Understanding of software design principles and development best practices.
Experience across the software development lifecycle.
Proven experience in a similar software development role.

Responsibilities

Develop new functionality across internal and customer-facing applications.
Support and enhance existing systems and services.
Deliver change requests, bug fixes, and improvements to bespoke in-house applications.
Work on development projects across the business.
Participate in Agile ceremonies, including daily stand-ups, planning sessions, and code reviews.
Write clean, maintainable, and well-tested code.
Take part in a support rota for development-related issues and investigations.
Deploy planned releases and hotfixes in line with team processes and release schedules.
Collaborate with colleagues to deliver solutions that meet business and customer requirements.
Contribute ideas and best practices to improve development standards and processes.

Desired Qualifications

Experience working with billing systems in Telecommunications, MSP, or ICT environments.
Exposure to RabbitMQ or similar messaging technologies.
Previous experience within Telecommunications or Healthcare sectors.
Knowledge of, or interest in, cloud-based development.
Understanding of secure development principles and best practices.

C# Developer

📍 Shoreham-by-Sea, West Sussex or Leicestershire / Hybrid 💰 Competitive Salary + Benefits

Join Focus Group as a C# Developer

We're looking for a talented C# Developer to join our growing Development team at Focus Group.

This is an exciting opportunity to play a key role in the development and enhancement of our portfolio of internal and customer-facing applications. Working closely with a collaborative team of developers, you'll build new functionality, support existing systems, and contribute to projects that have a direct impact on the business and our customers.

If you're passionate about writing quality code, solving complex problems, and working across the full software development lifecycle, we'd love to hear from you.

What You'll Be Doing

Developing new functionality across Focus Group's portfolio of internal and customer-facing applications
Supporting and enhancing existing systems and services
Delivering change requests, bug fixes, and improvements to bespoke in-house applications
Working on a variety of development projects across the business
Participating in Agile ceremonies including daily stand-ups, planning sessions, and code reviews
Writing clean, maintainable, and well-tested code
Taking part in a support rota to assist with development-related issues and investigations
Deploying planned releases and hotfixes in line with team processes and release schedules
Collaborating closely with colleagues to deliver solutions that meet business and customer requirements
Contributing ideas and best practices to improve development standards and processes

Essential Skills & Experience

Strong commercial experience with C# and .NET
Experience developing with WinForms and MVC
Good understanding of SQL and database development
Experience with HTML5, CSS and Bootstrap
Experience developing and consuming APIs
Familiarity with tools such as Postman
Comfortable writing and maintaining unit tests
Experience using Git and branching strategies
Understanding of software design principles and development best practices
Experience working throughout the software development lifecycle
Excellent problem-solving skills and attention to detail
Strong communication and relationship-building skills
A customer-focused approach with the ability to understand and deliver business requirements
Passion for delivering high-quality software and maintaining development standards
Proven experience in a similar software development role

Desirable Skills

Experience working with billing systems within Telecommunications, MSP, or ICT environments
Exposure to RabbitMQ or similar messaging technologies
Previous experience within Telecommunications or Healthcare sectors
Knowledge of, or interest in, cloud-based development
Understanding of secure development principles and best practices

About the Company

Focus Group

Telecoms, IT, and cybersecurity solutions provider

Focus Group is a UK technology services provider offering telecoms, connectivity, IT, cybersecurity, mobile services, and energy as a single package for businesses. It supports hosted or on-premise phone systems, VoIP, and Microsoft Teams integration, plus managed IT services, cloud (e.g., Microsoft 365), and disaster recovery, with a single bill and one point of contact. The company stands out by partnering with multiple network providers to tailor flexible, competitively priced bundles rather than relying on one vendor, and it has grown through active M&A with private equity backing. Its goal is to simplify technology management for UK organizations by providing an integrated, end-to-end solution for communications, IT, and security needs.

Company size: 1,001-5,000
Company stage: Growth Equity (Non-Venture Capital)
Total funding: $28.1M
Headquarters: Shoreham-by-Sea, United Kingdom
Founded: 2004

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