Lead C# Developer .Net Core - Fintech

Client Server; Newcastle upon Tyne; On-site; GBP 135,000 - 165,000; Full time

Benefits offered by this job

Salary up to £150k + Bonus

25 days holiday

Social events and early finishes on Fridays

Job summary

A well-funded Fintech scale-up is looking for a Lead C# Developer / Backend Software Engineer in Newcastle. You will design and implement core application logic, build APIs and microservices, and provide technical leadership while mentoring your team. Ideal candidates will have a strong background in C# .Net Core and demonstrated leadership skills. This role offers a competitive salary up to £150k, flexible working hours, and a supportive social atmosphere. Apply now to embark on an exciting career in a scaling company.

Qualifications

• Minimum 2.1 BSc in Computer Science or similar technical discipline from a top tier university.
• Strong technical leadership skills.
• Expertise with modern C# .Net Core and knowledge of other OO languages.
• Experience across the full software development lifecycle.
• Strong knowledge of modern software engineering best practices.

Responsibilities

• Design and implement the logic behind core applications.
• Build APIs and microservices for data processing.
• Oversee secure, reliable server environments.
• Gather requirements from internal teams and customers.
• Instill best practices, conduct code reviews, and mentor team members.

Skills

Backend C#

Technical leadership

C# .Net Core

Python

OOP

Data Structures

Design Patterns

Algorithms

Education

2.1 BSc in Computer Science or similar

Job description

Lead C# Developer / Backend Software Engineer (C# .Net) Newcastle onsite to £150k

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

You could be joining a well-funded Fintech scale-up that is establishing a technical centre of excellence in the North East.

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 brand new 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 £150k + Bonus
• 25 days holiday
• Social team atmosphere with a range of events and early finish for drinks on Fridays

Apply now to find out more about this Lead C# Developer / Backend Software Engineer (C# .Net Core) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.