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# Lead C# Developer / Backend Software Engineer

- **Company:** Client Server
- **Location:** Newcastle upon Tyne, UK
- **Experience:** Expert
- **Salary:** £110,000 - £130,000
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), C Sharp (Programming Language), C++ (Programming Language), Code Review, Python (Programming Language), Software Construction, Software Engineering, .NET Core, Backend, Information Technology
- **Published:** November 6, 2026
- **Apply:** https://www.client-server.com//job/lead-c-developer-net-core-fintech-8/apply

## About the Role

* You have achieved a minimum 2.1 BSc in Computer Science or similar technical discipline from a top tier / Russel Group university, backed by A's at A-level
 * You have strong technical leadership skills
 * You have expertise with modern C# .Net Core, Python skills would also be of benefit (will also consider other OO languages e.g. C++, Java)
 * You have a strong knowledge of modern software engineering best practices and have experience across the full software development lifecycle
 * You're a technologist who enjoys collaborating and problem solving, working on complex, distributed systems
 * You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patterns, Algorithms
 * You're excited to join a scaling company in a role that you can shape and influence

## Description

Lead C# Developer / Backend Software Engineer (C# .Net) Newcastle onsite to £130k

Do you have expertise with backend C# combined with strong technical leadership skills?

You could be progressing your career in a hands-on Lead C# Developer role at a well-funded Fintech scale-up.

As a Lead C# Developer / Backend Software Engineer you'll design and implement the logic behind core applications, build APIs and microservices that handle data processing, business rules and third-party integrations and oversee the configuration and upkeep of secure, reliable server environments.

You'll work closely with internal teams and customers to gather detailed requirements through meetings and workshops and help shape the product vision and roadmap by offering technical insight and feasibility guidance, remaining hands-on with architecture and design.

You will be a technical leader, instilling best practices, conducting code reviews, mentoring and collaboratively problem solving to help your team remove any blockers and delivery high quality software.