Lead C# Developer .Net - FinTech

Client Server Limited; Reigate; Hybrid; GBP 90,000 - 110,000; Full time

Benefits offered by this job

Hybrid work

Parental leave

25 days holiday

Pension

Health care

Life assurance

Training & development

Social events

Job summary

Client Server Limited is seeking a Lead C# Developer to join on a hybrid basis in the UK, with WFH options and a responsibility for a flagship desktop platform. You’ll lead three Agile teams, shaping architecture and delivering secure, scalable features for a high-traffic insurance system.

You’ll collaborate with Product Owners, push technical excellence, and mentor engineers while enjoying a competitive package and 3 days remote work.

Qualifications

• Expertise with C# .Net Core backend and large scalable systems.
• Strong technical leadership experience with feature ownership.
• Collaborative and pragmatic, able to influence senior engineers.
• Advocate for clean, reusable, maintainable code and best practices.
• Knowledge of event-driven architecture.
• Understanding of CS fundamentals: OOP, data structures, design patterns, algorithms.
• Understanding of CI/CD and IaC.
• Appreciation of Azure, SaaS, PaaS, microservices.
• Degree in a STEM field with strong mathematics.

Responsibilities

• Lead three Agile teams and architect, design and develop features for the desktop platform.
• Ensure security, reliability, maintainability, usability and performance.
• Collaborate with Product Owner and other teams to influence design and technical choices.
• Provide technical ownership in an Agile environment with close collaboration.

Skills

C# .Net Core

Backend development

Technical leadership

Agile

CI/CD

IaC

Event-driven architecture

OOP & data structures

Azure

Mentorship

Education

Degree in Computer Science

Tools

Azure DevOps

CI/CD tooling

Job description

Lead C# Developer / Engineer (C# .Net Desktop Application) Reigate / WFH to £100k

Do you have expertise with C# desktop development, working on complex scalable systems?

You could be progressing your career, in a senior, hands‑on leadership role working on complex and technically challenging systems with continual learning opportunities a global Fintech.

What's in it for you:

• Up to £100k salary plus bonus (c20%)
• Hybrid working (3 days a week work from home)
• Enhanced parental leave
• 25 days holiday (plus buy days and your birthday off)
• Pension (up to 10% contribution)
• Health Care and Life Assurance
• Training and career development
• Social events and a range of other perks

Your role:

As a Lead C# Developer you'll manage three Agile teams comprising around ten experienced software engineers, responsible for the flagship desktop insurance platform that handles 4 billion requests per month.

You'll play a key role in architecting, designing and developing new features and enhancements whilst ensuring high levels of security, reliability, maintainability, usability and performance.

Collaborate with the Product Owner and with other development teams, you'll input into design and technical choices and provide technical ownership an Agile environment that encourages close collaboration and continual improvement.

Location / WFH:

There's a flexible work from home hybrid model, you'll join colleagues in the Reigate office twice a week for team meet‑ups and stakeholder meetings with the other three days work from home.

About you:

• You have expertise with C# .Net Core backend software development, having worked on large, scalable systems with complexity
• You have strong technical leadership experience (taking ownership of features, not managing people)
• You are collaborative and pragmatic yet able to push back and influence senior engineers
• You're an advocate of creating, clean, reusable and maintainable code and have a good knowledge of modern Microsoft software engineering best practices
• You have a good knowledge of event driven architecture
• You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patters, Algorithms
• You have a good understanding of CI/CD and Infrastructure as Code (IaC)
• You have an appreciation of Azure, SaaS, PaaS, microservices
• You're likely to be degree educated in a relevant STEM discipline e.g. Computer Science with a good grasp of mathematics