Software Developer

Valcon is a north-western European consulting, technology and data company based in the UK, the Netherlands, Denmark, Sweden, and even Croatia.

Valcon is private equity backed and in recent years has bought together some of the most exiting companies from these companies to form one of the brightest and most exciting consultancies around.

We’re one of the fastest growing companies across Europe and have no plans to stop.

What do we do:

Our mission is to combine premium consulting with deep technology and data knowledge to add value to our clients.

Overview of Technology Practice:

We’re at the forefront of empowering the future of work, helping organisations of all sizes achieve their goals. For large enterprises, we eliminate manual labour through automation and intelligent tools, boosting knowledge worker productivity. Across the board, we build high-quality, performant and user-friendly solutions that leverage the latest technologies to deliver exceptional results for both scale-ups and large companies.

Our Technology Practice has 5 capabilities:

• Software Engineering
• Quality Management

We’re hiring: Mid-Level Software Engineers (C# / .NET) | Join Valcon’s Growing Tech Team

Another exciting project win means we’re looking to expand our engineering team, and this is your chance to join a consultancy that’s scaling fast and solving real-world challenges with smart, modern tech.

At Valcon, we don’t just deliver, we build. And we’re now on the lookout for Mid-Level Software Engineers who are hands-on, collaborative, and passionate about writing clean, modern C# code.

What you’ll be working with:

We’re looking for developers with solid core engineering skills and a strong background in modern C# and .NET development, including:

Core C# & .NET Skills

• Hands-on experience with C# (latest versions preferred)
• Deep knowledge of .NET Core / .NET 6/7/8 for building scalable APIs
• Strong grasp of OOP principles and design patterns

API Development

• Building and maintaining RESTful APIs
• Solid understanding of HTTP protocols, status codes, headers, etc.
• API documentation using tools like Swagger/OpenAPI

Legacy Systems

• Exposure to or experience with WCF services — we still support some older systems, so comfort working with a mix of modern and legacy tech is key
• DTOs and model binding

Security

• API authentication and authorization best practices
• Knowledge of OAuth2, JWT, OpenID Connect
• Secure coding practices for exposed endpoints

Integration & Communication

• Consuming third-party APIs (REST/SOAP)
• Async/await, tasks, and non-blocking design

Database Integration

• Hands-on with Entity Framework Core or similar ORM
• Confident writing SQL and working with SQL Server

Testing & Quality

• Writing robust unit and integration tests
• Familiar with xUnit, NUnit, Moq, etc.

DevOps & Cloud Awareness (Nice to have)

• Knowledge of Azure DevOps pipelines, CI/CD workflows
• Deployment experience on Azure, AWS Lambda, or container platforms
• You’ll work on impactful consulting projects across industries
• You’ll be surrounded by smart, supportive people who value clean code and collaboration
• You’ll have space to grow, technically, professionally, and personally

Experience

• Core C# & .NET Skills
• API Development
• Legacy Systems
• Security
• Integration & Communication
• Database Integration

Keywords

• c#
• .Net
• API

Location

United Kingdom

Apply today!

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Software Developer

Job Primary Location: United Kingdom

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