Senior C# .NET Backend Engineer – Remote/Hybrid

Client Server; Bracknell; Hybrid; GBP 75,000 - 85,000; Full time

Benefits offered by this job

23 days holiday

Pension

Life Assurance

Income Protection

Critical Illness Cover

Job summary

Client Server is seeking a backend-focused C# Developer to help rebuild a major international payments platform from Bracknell with hybrid work. You’ll design and implement robust APIs and backend services using C# .NET Core, lead features end-to-end, and own critical technical projects.

You will optimise SQL databases, work on microservices and event-driven architectures, and mentor other engineers while using AI coding tools such as Claude or Copilot to boost productivity.

Qualifications

• Strong C# .NET Core backend development experience.
• Experience building production APIs.
• Good SQL skills.
• Experience with system design, software architecture, microservices and event-driven systems.
• Comfortable with cloud infrastructure in production; AWS preferred.
• Experience mentoring engineers and sharing technical knowledge.
• Hands-on experience using AI coding tools such as Claude or Copilot.

Responsibilities

• Design and implement robust APIs and backend services using C# .NET Core.
• Lead new features and technical projects from design through to production.
• Contribute to evolution of the architecture and system design across services.
• Mentor colleagues and promote engineering best practices.

Skills

C# .Net Core

APIs

SQL

System design

Microservices

Event-driven

AWS

Mentoring

AI tools Claude Copilot

Payments experience

Job description

Client Server is seeking a backend-focused C# Developer to help rebuild a major international payments platform from Bracknell with hybrid work. You’ll design and implement robust APIs and backend services using C# .NET Core, lead features end-to-end, and own critical technical projects.

You will optimise SQL databases, work on microservices and event-driven architectures, and mentor other engineers while using AI coding tools such as Claude or Copilot to boost productivity.