Dotnet Developer

Important Note - This is a full time in-office role in Lancaster. If being in office full time isn't of interest / do-able for you, please don't apply for this position as this requirement is fixed. Thank you!

Role: Senior IT Developer (ASP.NET, C#, SQL Server)

Salary: £60,000-£65,000 p/a

Location: Lancaster (Office-based)

The Opportunity:

Our client, a growing estate agency, is looking for an experienced Senior IT Developer to join their team and take ownership of a business-critical platform that supports the day-to-day operations of the organisation. This is an individual contributor role and you will be the sole person in the development team.

This is an excellent opportunity for someone who enjoys working with complex systems, solving technical challenges and making a real impact. You'll play a key role in maintaining and enhancing an established application built across a mixed technology stack, while supporting its ongoing evolution towards more modern platforms.

The successful candidate will work across the full software development lifecycle, from troubleshooting production issues and maintaining legacy code to developing new integrations and driving continuous improvements. This role would suit someone who is comfortable working within existing systems while helping shape their future direction.

Key Responsibilities:

Application Support & Maintenance

• Maintain and support a business-critical CRM application built using Classic ASP, C# and SQL Server
• Diagnose and resolve issues within a live production environment
• Ensure the stability, reliability and performance of the platform

Development & Continuous Improvement

• Develop new features and enhancements across both front-end and back-end systems
• Build and maintain integrations with third-party applications using APIs and webhooks
• Contribute to the ongoing modernisation of the software platform

Collaboration & Knowledge Sharing

• Work closely with internal stakeholders to understand business requirements
• Produce and maintain technical documentation where required
• Support knowledge sharing across the wider development team

What We're Looking For:

Essential Experience:

• 5+ years' commercial software development experience
• Strong experience with C# and .NET
• Excellent knowledge of Microsoft SQL Server, including query writing, debugging and performance optimisation
• Commercial experience maintaining applications built with Classic ASP
• Strong debugging and troubleshooting skills
• Experience developing and maintaining API integrations
• A solid understanding of full-stack application architecture
• Experience using Git or other source control systems
• Experience working within Visual Studio or similar development environments

Desirable:

• Experience with ASP.NET (Web Forms, MVC or Razor)
• JavaScript, HTML and CSS experience
• Experience with Microsoft Power Platform (Power Apps and Power Automate)
• Experience working with Microsoft Azure, including Functions and integrations
• Knowledge of modern front-end frameworks such as Angular or React
• Understanding of software architecture and design patterns

What We're Looking For:

We're looking for someone who enjoys working with complex legacy systems and takes pride in delivering stable, reliable software. You'll be comfortable navigating unfamiliar codebases, solving technical problems and balancing ongoing maintenance with continuous improvement. A proactive mindset and the ability to take ownership of key systems will be essential for success in this role.

If you're an experienced Software Developer looking for an opportunity to make a genuine impact within an established organisation while helping shape the future of its technology estate, we'd love to hear from you.

Important Notice:

We are expecting a high volume of applications for this role and while we do our best to respond to as many applicants as we can, it isn't always possible to get back to everyone. With this in mind, if you've not heard from a member of our team within 2 weeks of submitting your CV, please assume that your application has not been successful on this occasion.

Both Leo Technology and the companies we partner with are incredibly passionate about building environments where people from all backgrounds and walks of life are embraced. Our mission is to welcome everyone and create inclusive teams. We celebrate difference and encourage people from all backgrounds to apply.

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