Windows Developer (.NET)

📍 Location: Essex – 2 days per week
💼 Type: Permanent
💰 Salary: Up to £50,000

Cooper Lomaz are working with a leading organisation to recruit an experienced .NET Windows Developer to join their growing technology team.

This is an exciting opportunity to work on business-critical applications, helping to modernise legacy systems and play a key role in a wider cloud transformation programme.

The Role

As a Windows Developer, you will be responsible for designing, developing, and maintaining high-quality Windows applications and services. You’ll work closely with both technical teams and business stakeholders to deliver scalable and reliable solutions.

A key part of the role will involve refactoring existing systems into .NET and contributing to the future cloud architecture strategy.

Key Responsibilities

• Develop and maintain Windows applications and services
• Collaborate with project managers, testers, and business users
• Refactor and migrate legacy systems into C# / .NET
• Deliver high-quality solutions within agreed timescales
• Produce and maintain technical documentation
• Participate in code reviews and follow best practices
• Contribute to design, planning, and estimation sessions
• Take ownership of tasks and manage your workload effectively

About You

We’re looking for a developer with a strong technical background and a proactive approach to problem-solving.

Experience Required

• Minimum 3 years’ experience developing in C# / .NET
• Strong experience with SQL Server (T-SQL)
• Experience working with APIs, databases, and integrations
• Proven track record of delivering production-ready software
• Experience with Agile/Scrum methodologies (desirable)
• Exposure to performance optimisation and troubleshooting
• Understanding of secure coding practices
• Financial services experience (advantageous)

Technical Skills

• Strong knowledge of C#, .NET / .NET Core
• Experience with WinForms or WPF
• Familiarity with REST APIs, JSON/XML
• Understanding of software architecture patterns (MVC, MVVM)
• Experience with Git or other version control systems
• Knowledge of CI/CD pipelines and automated testing
• Exposure to Azure or cloud technologies

Soft Skills

• Strong communication skills across technical and non-technical teams
• Well organised with good time management
• Able to work independently and collaboratively
• Adaptable with a continuous improvement mindset
• High attention to detail and quality

Qualifications

• Degree in Computer Science, Software Engineering, or similar
  OR equivalent commercial experience
• Microsoft certifications (e.g. Azure) are beneficial