Act-3D (Lumion) is seeking a talented Fullstack .NET Software Engineer to modernize our legacy desktop application and build a robust, cloud-based 3D asset management and distribution platform. In this role, you will contribute to a transformative journey in software engineering, working on cutting-edge technologies to enhance our product offerings.
Join our innovative organization at an exciting time as we transition from the agile momentum of a successful scale-up to the broader horizons of an expanding enterprise. If you're a Fullstack .NET Software Engineer eager to shape modern software solutions, particularly within the architectural visualization industry, your skills could be instrumental in driving our growth.
Your role:
Act-3D’s ecosystem includes legacy desktop applications and modern web-based solutions that cater to the architectural and 3D visualization industries. You will play a pivotal role in migrating our software systems to state-of-the-art architectures, ensuring scalability, reliability, and seamless user experiences. You will engage in all stages of software development, from conceptualization to deployment and beyond.
Main responsibilities:
- Develop and maintain .NET-based APIs for authentication, configuration, licensing, and interaction with cloud services.
- Implement and enhance the user interface using React, TypeScript, and Node.js.
- Design and maintain a scalable cloud architecture for storing and distributing several gigabytes of 3D assets.
- Ensure resilience, security, and efficient handling of large files, potentially incorporating CDN and caching strategies.
- Integrate best practices for automated testing, continuous integration, continuous delivery, and infrastructure as code.
- Collaborate with product teams, designers, and other engineers to deliver robust solutions that meet business requirements and user expectations.
- Stay abreast of emerging web and cloud technologies to integrate relevant advancements into our systems.
What you bring to the table:
- Proven experience as a Fullstack .NET Software Engineer or in a similar role for a minimum of 5 years.
- Proficiency in C# and the .NET ecosystem.
- Strong frontend development skills in React, TypeScript, and Node.js.
- Solid understanding of building and consuming Web APIs.
- Experience with modern cloud platforms (e.g., AWS, Azure, or GCP) and associated architectural patterns.
- Familiarity with CI/CD pipelines, containerization (e.g., Docker), and infrastructure automation tools.
- Demonstrated ability to work independently and manage multiple priorities effectively.
- Excellent problem-solving capabilities and attention to detail.
- Strong communication and collaboration skills.
- Fluency in English is a must; knowledge of Dutch is preferred but not essential.
- Bachelor’s or master’s degree in Computer Science or a related field.
- Background or interest in 3D software, architecture, engineering, or related domains is a plus.
- Ability to work in-person from our HQ in Sassenheim for 3-4 days a week minimum (this is not a remote position!).
What we offer:
- An attractive salary and bonus structure.
- Full-time contract.
- Flexible working hours
- 30 vacation days per year.
- 20 work-cation schemes per year.
- Local Office Benefits: Free lunch and free office gym.
- The opportunity to work in an enthusiastic, international team, in a creative environment, focused on people, growth, and collaboration.
Friendly note:
Please do not make use of this vacancy as an acquisition opportunity.
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- Posted
- Nov 04, 2025
- Type
- Full-time
- Level
- Mid-Senior
- Location
- Sassenheim
- Company
- Lumion
Industries
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