Senior C# Developer

Infused Solutions Ltd; Greater London; On-site; GBP 50,000 - 60,000; Full time

Job summary

A London-based technology firm is seeking a Senior C# Developer for a fully onsite role. This position involves designing, developing, and maintaining business-critical applications using C#/.NET and SQL. The ideal candidate will possess strong commercial experience and advanced knowledge in these technologies. Responsibilities include troubleshooting, mentoring junior developers, and collaborating with cross-functional teams. The role offers a competitive salary range of £50,000 - £60,000 based on experience and provides long-term career progression opportunities.

Benefits

Salary of £50,000 - £80,000 depending on experience

Opportunity for career progression

Collaborative engineering team

Qualifications

• Strong commercial experience as a Senior C# Developer.
• Advanced knowledge of C# / .NET.
• Strong experience working with SQL (SQL Server or similar).
• Experience delivering production-grade applications.

Responsibilities

• Design, develop, and maintain applications using C# / .NET.
• Write, optimise, and maintain SQL queries and stored procedures.
• Contribute to technical architecture discussions.
• Support and mentor junior developers.
• Collaborate closely with business teams onsite.

Skills

C# Development

SQL

Technical Architecture

Code Reviews

Mentoring

Stakeholder Engagement

Job description

Senior C# Developer

Location: London (Fully Onsite)

Employment Type: Permanent

Salary: £50,000 - £60,000 (DOE)

Visa Sponsorship available

We're working with a London-based organisation that is looking to hire an experienced Senior C# Developer to join their engineering team in a fully onsite position. This role is ideal for someone who enjoys hands-on development, working closely with the business, and taking ownership of complex systems.

The Role

As a Senior C# Developer, you'll be responsible for designing, developing, and maintaining business-critical applications built on C#/.NET and SQL. You'll play a key role in technical decision-making, improving code quality, and ensuring the reliability and performance of core systems. You'll work closely with other developers, QA, product owners, and non-technical stakeholders, contributing across the full software development lifecycle.

Key Responsibilities

• Design, develop, and maintain applications using C# / .NET
• Write, optimise, and maintain SQL queries, stored procedures, and database schemas
• Contribute to technical architecture and system design discussions
• Carry out code reviews and promote best development practices
• Support and mentor junior and mid-level developers
• Troubleshoot, debug, and improve existing systems
• Collaborate closely with business and technical teams onsite

Essential Skills & Experience

• Strong commercial experience as a Senior C# Developer
• Advanced knowledge of C# / .NET
• Strong experience working with SQL (SQL Server or similar)
• Experience delivering and supporting production-grade applications
• Solid understanding of software design principles and best practices
• Comfortable working in a onsite London-based team
• Strong communication and stakeholder engagement skills

Desirable Skills

• Experience with modern .NET versions
• Exposure to cloud platforms (Azure, AWS, or similar)
• Experience with RESTful APIs
• Familiarity with Agile / Scrum environments

What's On Offer

• Salary of £50,000 - £80,000 depending on experience
• onsite role in London
• Opportunity to work on business-critical systems
• Collaborative, experienced engineering team
• Long-term stability and career progression

Apply Now

If you're a Senior C# Developer looking for an onsite role in London where you can have real technical ownership and work on complex systems, we'd love to hear from you