Lead Software Engineer

Arch Capital Group; Manchester; On-site; GBP 68,000 - 108,000; Full time

Job summary

Arch Capital Group in Manchester is seeking a Lead Software Engineer to guide design and deliver high‑quality C# applications. You will lead architecture discussions, promote best practices, and mentor engineers across the team in a fast-paced environment.

This role requires deep knowledge of TDD/BDD/DDD, cloud platforms (Azure/AWS), SQL/NoSQL, and modern DevOps. You will collaborate with peers to optimize performance, document systems, and stay current with evolving technologies to enable

Qualifications

• Comprehensive understanding of C#
• Experience with TDD, BDD, and DDD
• Experience with SQL and NoSQL DBMS
• Experience with a cloud platform such as Azure or AWS
• Experience with an AI platform such as OpenAI is desirable

Responsibilities

• Provide technical guidance and leadership in the design and development of software applications using C#.
• Ensure the application of best practices in coding, testing, and maintenance.
• Stay updated with the latest developments in C# and related technologies.
• Design, code, test, debug, and document complex applications and systems.
• Optimize and refactor existing code to improve performance and maintainability.
• Collaborate with other team members to integrate systems and solutions.

Skills

C# proficiency

TDD/BDD/DDD

AI platform OpenAI

Cloud platforms

Tools

GitHub

Job description

Salary: £68,000 - 108,000 per year

Requirements

• Comprehensive understanding of C#
• Experience with TDD, BDD, and DDD
• Ability to confidently discuss architectural patterns and trade-offs
• Experience with SQL and NoSQL DBMS
• Experience with a modern source control system, for example GitHub
• Experience with a cloud platform such as Azure or AWS
• Experience with event sourcing is desirable
• Experience with an AI platform such as OpenAI is desirable

Responsibilities

• Provide technical guidance and leadership in the design and development of software applications using C#.
• Ensure the application of best practices in coding, testing, and maintenance.
• Stay updated with the latest developments in C# and related technologies.
• Design, code, test, debug, and document complex applications and systems.
• Optimize and refactor existing code to improve performance and maintainability.
• Collaborate with other team members to integrate systems and solutions.

Technologies

• AI
• AWS
• Azure
• C#
• Cloud
• DDD
• GitHub
• NoSQL
• SQL
• TDD
• DevOps

More

We are a company with a culture rooted in collaboration, expertise and innovation, and we aim to promote progress and inspire our clients, employees, investors and communities to achieve their greatest potential. Our work is the catalyst that helps others achieve their goals. In short, we Enable Possibility. This is a full-time Lead Software Engineer role based in Manchester, United Kingdom. We value people who enjoy solving complex business problems, working with talented colleagues and bringing an innovative mindset.

last updated 36 week of 2026