Lead C# Developer.Net Core - Fintech

Client Server; Newcastle upon Tyne; On-site; GBP 110,000 - 130,000; Full time

Job summary

Client Server in Newcastle upon Tyne is seeking a Lead C# Developer / Backend Software Engineer to own backend systems, architect APIs and microservices, and mentor a growing team. You will stay hands-on with design while guiding technical decisions and roadmaps.

Requirements include strong leadership and a 2.1 BSc in Computer Science or equivalent, plus deep experience in C# .NET Core. Python/C++/Java know-how is a plus. Onsite in Newcastle with a competitive package and bonus potential.

Qualifications

• Minimum 2.1 BSc in Computer Science or equivalent.
• Strong technical leadership and hands-on development experience.
• Expertise with modern C# .NET Core; Python/C++/Java are a plus.
• Experience across the full software development lifecycle.

Responsibilities

• Design and implement the logic behind core applications.
• Build APIs and microservices handling data processing and integrations.
• Oversee secure, reliable server environments and deployment.
• Lead code reviews, mentoring, and problem solving to unblock delivery.

Skills

C# .NET Core

Technical leadership

Mentoring

Python

C++

Java

Education

2.1 BSc in Computer Science or equivalent

Job 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.

Location:

You'll join colleagues in Central Newcastle offices on a full-time basis (Monday to Friday), working hours 0900-1800 with some flexibility. The offices are well equipped and offer fantastic views across the City and the local countryside, many employees walk or cycle in (onsite showers available!).

About you:

• 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

What's in it for you:

As a Lead C# Developer / Backend Software Engineer you will receive a competitive package:

• Salary to £130k + Bonus
• 25 days holiday
• Social team atmosphere with a range of events

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Lead C# Developer.Net Core - Fintech • Newcastle upon Tyne, Tyne and Wear, England