Software Developer (Backend .NET Developer)

Wavenet is looking for a Software Developer with proven experience building robust, data-driven applications in C#.NET that integrate tightly with Microsoft SQL Server and external APIs.

You’ll be part of a well-established engineering team that has been delivering trusted technology to schools for decades. Our systems handle large-scale data synchronisation and automation across multiple platforms. The core stack is .NET and SQL Server, with some emerging components written in Python as we evolve selected services.

Our development team is also adopting AI-assisted development tools (including Claude Code within the terminal) to accelerate engineering workflows, debugging, and code generation.

What You’ll Be Doing

• Design, build, and maintain .NET backend applications and APIs that synchronise data across systems.
• Develop and consume RESTful APIs, managing authentication, data mapping, and transformation.
• Implement and optimise data access using Dapper, Entity Framework, and direct SQL where appropriate.
• Design efficient SQL Server schemas, queries, and stored procedures.
• Build and maintain message-driven workflows using RabbitMQ.
• Refactor legacy components into modular, maintainable services.
• Troubleshoot and resolve issues across application and data layers.
• Document key system integrations, database models, and API contracts.
• Work with AI-assisted development tooling (Claude Code) to improve development productivity and code quality.

• Strong commercial experience with C#/.NET backend development.
• Experience supporting and maintaining live production systems with large user bases.
• Deep knowledge of SQL Server and relational database design.
• Proven experience building and integrating APIs (internal and third-party).
• Hands-on experience with Dapper, Entity Framework, and T-SQL.
• Experience designing or operating message-driven systems using RabbitMQ or similar technologies.
• Strong analytical and debugging skills across application, data, and integration layers.
• Experience troubleshooting production systems and complex data workflows.
• Clear communication and disciplined documentation habits.
• Comfortable working with AI-assisted development tools (such as Claude Code, Copilot, or similar) to improve development productivity.

Bonus Skills

• Exposure to Python (e.g. FastAPI, Flask) or willingness to learn.
• Experience with GitLab CI/CD pipelines.
• Understanding of OAuth2/OpenID Connect and secure integration design.
• Experience building or maintaining data-sync or ETL processes at scale.

Additional Information

Here’s a closer look at what we offer:

• Annual Leave: Start your journey with 25 days of leave, increasing by one day each year up to 28 days—our way of expressing appreciation for your dedication.
• Health & Wellbeing: Your wellbeing is our priority. Benefit from private medical coverage, discounted health plans, virtual GP access, an eye care scheme, and a comprehensive employee assistance program, all facilitated by our Wellbeing Team.
• Wavenet Academy: We are excited to announce the launch of Wavenet Academy, our new user-friendly Learning Management System (LMS). This platform is designed to enhance learning, training, and personal development initiatives across our organisation.

Ready to join the UK’s largest managed service provider? Apply today.

We are committed to building a diverse and inclusive workforce. We welcome applicants from all backgrounds and experiences to apply and bring their unique perspectives to our team.