Senior .NET Engineer - Fully Remote, API & Systems

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

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