Senior Developer .NET & C#

Laing O'Rourke group; Dartford; On-site; GBP 50,000 - 70,000; Full time

Job summary

Laing O'Rourke group is looking for a Senior Software Developer specializing in SolidWorks and AEC applications in Dartford, England. The role involves developing CAD automation tools, enhancing engineering workflows, and collaborating closely with engineering teams to deliver high-quality digital solutions. Candidates should have strong expertise in C#, .NET, and CAD technologies, with a background in engineering software development. This position offers opportunities for continuous improvement and mentorship in a transformative environment.

Qualifications

• Strong experience with C#, .NET, and .NET Framework.
• Proven experience with SolidWorks and the SolidWorks API.
• Solid understanding of object-oriented programming and software design principles.

Responsibilities

• Develop and maintain SolidWorks add-ins, macros, and API‑driven automation tools using C#.
• Design and build Windows desktop applications using .NET and C#.
• Work closely with engineers to translate technical requirements into software solutions.

Skills

C#

.NET

SolidWorks

CAD automation

Education

Degree in Computer Science or Software Engineering

Tools

SolidWorks API

REST APIs

SQL

Azure DevOps

Job description

Senior Software Developer – SolidWorks & AEC Applications

Location: Dartford

Our Technology & Innovation team is central to this transformation—developing smarter, more efficient ways to design and deliver complex projects.

We are looking for an experienced Software Developer with strong expertise in C#, .NET, and CAD automation to build and enhance engineering tools, particularly within SolidWorks and AEC applications. This role focuses on improving engineering workflows, automating design processes, and building scalable, maintainable solutions that integrate seamlessly with internal systems.

You’ll collaborate closely with engineering, design, and manufacturing teams to reduce manual effort, improve consistency, and deliver high-quality digital solutions. A structured approach to development and an interest in leveraging AI tools to enhance productivity will be key to success.

The team

Design Automation & Configuration (DAC) is an innovation-led team focused on transforming engineering knowledge into scalable digital products. By combining structured data, computational methods, and software development, we automate the creation of construction information—enabling configurability, improving quality, and driving efficiency across projects.

What to expect from the role

Automation & CAD Development

• Develop and maintain SolidWorks add-ins, macros, and API‑driven automation tools using C#
• Automate design workflows, including modelling, drawings, and BOM creation
• Improve efficiency and consistency by reducing manual engineering effort

Application Development

• Design and build Windows desktop applications using .NET and C#
• Integrate CAD tools with PLM, ERP, databases, and cloud platforms
• Ensure solutions are scalable, maintainable, and well‑documented

Collaboration & Support

• Work closely with engineers to translate technical requirements into software solutions
• Provide support for custom CAD applications and automation tools
• Troubleshoot issues related to performance, APIs, and automation workflows

Continuous Improvement & Leadership

• Maintain and enhance existing tools and documentation
• Contribute to development standards and best practices
• Support and mentor junior developers where required

Skills and experience

Essential Skills & Experience

• Strong experience with C#, .NET, and .NET Framework
• Proven experience with SolidWorks and the SolidWorks API
• Solid understanding of object‑oriented programming and software design principles
• Familiarity with engineering drawings, 3D modelling, and manufacturing concepts

Desirable Experience

• Experience with REST APIs, SQL, and system integrations
• Exposure to other CAD/CAE tools (e.g. Autodesk, Inventor, Revit, CATIA)
• Knowledge of CI/CD, Git, or Azure DevOps
• Experience with DriveWorks or PDM systems
• Interest or experience in AI‑assisted development tools
• Understanding of construction industry processes

Education & Background

• Degree in Computer Science, Software Engineering, or related discipline—or equivalent experience
• Background in developing software for engineering or manufacturing environments

We want to ensure our recruitment process is accessible to all. If you need the application form in an alternative format or you would like to know more about our recruitment process, please email [e-mail].