Senior .Net Developer – £85,000 - Fully remote

Ashdown Group; Staines-upon-Thames; Remote; GBP 77,000 - 94,000; Full time

Job summary

Ashdown Group is seeking a Senior .NET Developer to join a fast-growing tech business. Join an Agile delivery team building secure, high-volume systems using C# and .NET, delivering complex features and shaping technical standards.

This hands-on role balances coding with mentorship and collaboration, including CI/CD and secure integrations. The successful candidate will have 5+ years of commercial .NET/C# experience, strong API/services design, and experience with Git-based workflows in an Agile

Qualifications

• 5+ years of commercial experience with .NET and C#.
• Experience building APIs, services and distributed systems.
• Experience with CI/CD pipelines and Git-based workflows in an Agile environment.

Responsibilities

• Designing and developing complex features using modern .NET (C#).
• Translating business and regulatory requirements into robust technical solutions.
• Collaborating with Product Owners to refine, size and estimate work.
• Leading technical investigations and resolving production issues.
• Reviewing code for maintainability, performance and security.
• Contributing to CI/CD pipelines and release automation.
• Supporting secure integrations using certificate-based authentication.
• Driving continuous improvement in quality and engineering standards.

Skills

.NET/C#

APIs

CI/CD

Git workflows

Agile

Job description

Senior .Net Developer - £85,000 - Fully remote

Software Developer, Software Engineer - C# .Net - Energy

A highly successful and rapidly growing tech business are looking for a Senior .NET Developer to join their Agile delivery team building and evolving secure, high-volume transaction systems. This is a hands-on senior engineering role where you'll design and deliver complex features, shape technical standards, and help ensure systems remain secure, scalable and resilient. If you enjoy solving difficult technical problems, working with modern engineering practices, and mentoring others while staying close to the code then this role is for you.

Key responsibilities of this Senior Software Developer role will include:

• Designing and developing complex features using modern .NET (C#)
• Translating business and regulatory requirements into robust technical solutions
• Working closely with Product Owners to refine, size and estimate work
• Contributing actively to story pointing, estimation and sprint planning
• Leading technical investigations and resolving complex production issues
• Reviewing peer code to ensure maintainability, performance and security
• Contributing to CI/CD pipelines and release automation
• Supporting secure integrations using certificate-based authentication
• Driving continuous improvement in quality, automation and engineering standards

The ideal candidate will have 5+ years commercial experience with .NET and C# and strong experience building APIs, services and distributed systems. Experience working with CI/CD pipelines and Git-based workflows with a Agile environment is an advantage.

This is a brilliant opportunity to join a dynamic business where you will be able to work on technically complex, real-world systems, influence architecture and engineering standards and work as part of a collaborative team.

The salary on offer is up to £85,000 plus benefits.