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C# Developer - The ONE Group Ltd

C# Developer - The ONE Group Ltd

On site

Northampton, United kingdom

Full Time

02-02-2026

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Skills

C# SQL Architecture Software Architecture Databases power bi SQL Server Software Development

Job Specifications

C# Developer

Location: On-site (Northampton Based)

Job Type: Full-time, Permanent

Salary: £50,000

A well-established and business-critical IT team is looking for a C# Developer to join them on a permanent basis. This role sits at the heart of the organisation’s internal systems, supporting both the development of new applications and the ongoing improvement of existing platforms that underpin day-to-day operations.

What You’ll Be Doing:

Designing, developing, testing, and maintaining robust software applications that support core business objectives.
Enhancing and supporting existing systems to ensure performance, reliability, and usability.
Working collaboratively with cross-functional teams and stakeholders to define requirements and deliver solutions end-to-end.
Identifying bottlenecks, bugs, and performance issues, and implementing effective fixes and improvements.
Contributing to software architecture decisions with a focus on scalability, security, and maintainability.
Leading and participating in code reviews, promoting best practices across the development team.
Mentoring junior developers and supporting skill development within the wider IT team.

Essential Skills & Experience:

Strong commercial experience developing with C#.
Solid understanding of software development best practices and coding standards.
Experience working with relational databases, ideally SQL Server or Oracle.
Ability to analyse, debug, and optimise applications for performance and reliability.

Desirable Experience:

Experience with WinForms.
Exposure to Power BI or Crystal Reports.
Understanding of XML and modern internet technologies.
Familiarity with UML, class modelling, or flow diagramming.
Experience using code versioning tools.
Prior involvement in architectural design or mentoring responsibilities.

If this sounds like you - hit apply now!

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About the Company

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