Senior C# .NET Developer
Mayfair, London – Hybrid (1 – 2 days per week in the office)
£68,000 – £72,000 per annum
The Role
Our client is hiring a backend C# .NET Developer to join their engineering team in a hybrid role (1 – 2 days per week in the office). You’ll help build and maintain high-performance backend systems that support searching, order processing, and background processes with a strong focus on both application logic and data access.
This role is ideal for someone confident in both C#/.NET development and SQL, and who enjoys working on clean, maintainable code and performance-optimised database logic.
What You’ll Be Working On:
1. Designing and building backend services in C#.
2. Building secure, well-structured APIs with throttling and versioning.
3. Developing durable workflows.
4. Writing efficient and scalable SQL queries, stored procedures, and scripts.
5. Integrating external systems with custom data synchronisation logic.
6. Utilising Open Telemetry and Grafana for logs, metrics, tracing, and alerting across backend services.
7. Contributing to technical design discussions, code reviews, and deployments.
What They’re Looking For:
8. Strong experience in C#/.NET backend development.
9. Solid understanding of data modelling, indexing, and performance tuning.
10. Skilled in writing and optimising complex SQL queries and stored procedures.
11. Experience building and maintaining APIs, background jobs, and integration points.
12. Attention to detail, clean code, and a performance-first mindset.
13. Great problem-solving and troubleshooting skills.
14. Good communication and teamwork skills.
What You’ll Get:
15. £70,000 Salary.
16. 25 days holiday + 8 public holidays.
17. Employer Pension contribution.
18. Flexible hybrid working (1 – 2 days per week in-office).
19. A collaborative, experienced development team.
20. Opportunities to grow, learn, and influence architecture.
21. Company lunch and activities.
About Our Client
Founded in 2009, this tech-driven company revolutionized the IT channel by creating an automated platform that enables resellers to buy, sell, and procure IT hardware in one centralized, trade-only environment. What started with strong foundations in the UK has grown into a lean, international operation, with a close-knit team based in central London.
If you're a C# Developer with strong SQL skills and enjoy working on well-architected, business-critical backend systems, they would love to hear from you.
Apply now and bring your backend and database expertise to the next level.