Senior C# Developer
Location: London (Fully Onsite)
Employment Type: Permanent
Salary: £50,000 - £60,000 (DOE)
Visa Sponsorship: Not 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