Senior SolidWorks Developer (.NET / C# ) & AEC Applications

Senior Software Developer – SolidWorks & AEC Applications Location: Dartford Laing O'Rourke is at the forefront of construction innovation, shaping the future of the industry through advanced technology, automation, and modern methods of construction. 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 About us We are an international engineering and construction company delivering state-of-the-art infrastructure and buildings projects for clients in the UK, Middle East and Australia. Certainty, reliability, quality – this is what our clients want. And at Laing O'Rourke, we have more than 150 years of experience delivering it. Laing O'Rourke's story is one of energy, passion, ambition, people and teamwork. We harness the power of our experience, stretching back over a century and a half to deliver certainty for our clients. As part of the Disability Confident scheme, we would like to enable access to candidates with long term health conditions and disabilities through the ‘Offer an interview scheme'. This supports applicants that meet the essential criteria by offering an interview for the advertised position. Please let us know prior to interview what adjustments are required as well as discussing how we can support you in the workplace. 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 resourcingteam@laingorourke.com #LI-SB1