Sanderson are working with a growing, technology-led SaaS organisation that is investing heavily in secure, scalable platforms that support thousands of users globally. As part of their continued product evolution, they are looking for a Mid-Level .NET Engineer with strong experience in Identity & Access Management (IAM) and modern authentication standards.
You’ll join an Agile development team working on authentication and user identity services that underpin core platform functionality. Security is a key priority for this organisation, and they are looking for someone who is genuinely passionate about building secure, robust, and scalable systems.
Key Responsibilities
*Design, develop, and maintain authentication and authorisation services using .NET
*Write clean, scalable C# code following secure software engineering principles
*Implement and support modern authentication protocols across the platform
*Collaborate with engineers and architects to design secure system architecture
*Contribute to improving system security, resilience, and performance
*Test, deploy, refactor, and optimise applications across the SDLC
*Act as a subject matter contributor within IAM and authentication services
Skills & Experience
*Proven experience as a .NET / C# Engineer
*Strong hands-on experience with .NET and ASP.NET
*Solid understanding of OAuth 2.0, OpenID Connect, and JWT
*Strong interest in security and secure-by-design engineering practices
*Experience building and consuming RESTful APIs
*Familiarity with Agile methodologies
*Strong troubleshooting and communication skills
This is a full-time, permanent opportunity offering a salary up to £50,000 (DOE), with hybrid working.
If you’re a .NET Engineer looking to deepen your expertise in authentication, OAuth, OpenID Connect, and secure identity services, this is a strong opportunity to develop your career within a collaborative and forward-thinking technology environment.

Please Note: You must be a UK resident to apply.
Apply now or contact for more details.
Reasonable Adjustments:
Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.
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