Software Developer; Backend .NET Developer

Software Developer (Backend .NET Developer)

Wavenet – Sevenoaks, England, United Kingdom

Wavenet is a managed services provider specialising in cybersecurity, communications, and connectivity solutions that evolve alongside our customers' businesses. Since 2000, we have delivered trusted technology and future‑ready services, focusing on exceptional service quality and customer experience.

We are looking for a Backend Developer with proven experience building robust, data‑driven applications in C#/.NET that integrate tightly with Microsoft SQL Server and external APIs.

• Design, build, and maintain .NET backend applications and APIs that synchronize 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 Rabbit
  
  MQ.
• 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.

• Strong commercial experience with C#/.NET backend development.
• 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.
• Familiarity with message queues such as Rabbit
  
  MQ.
• Strong analytical and debugging skills.
• Clear communication and disciplined documentation habits.

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

• Office‑Based Working – collaborative team environment in our Sevenoaks office.
• Annual Leave – 25 days, increasing by one day per year up to 28 days.
• Health & Wellbeing – private medical coverage, discounted health plans, virtual GP access, eye care scheme, and employee assistance programme.
• Wavenet Academy – a user‑friendly Learning Management System for training and personal development.

Ready to join the UK’s largest managed service provider? Apply today or contact our friendly Talent Acquisition Team at for more information.

We are committed to building a diverse and inclusive workforce. We welcome applicants from all backgrounds and experiences.