Sagé Maenen
Talent acquisition
+31 (0)6 515 79 480
+31 (0)6 515 79 480
At Sioux Technologies, you’ll work on high-tech projects where software is the backbone of complex systems. As a Senior Software Engineer, you’ll turn abstract challenges into robust C# and C++ solutions. Think local processing, high-performance cores, and real-time control — no web frameworks or cloud dependencies. Just pure software engineering were performance and reliability matter most.
Sioux Technologies brings high-tech to life and contributes to a society that is healthier, safer, smarter, more sustainable and more enjoyable. We are a strategic high-tech solutions partner that develops, innovates and assembles complex high-tech systems with advanced Software, Mathware, Electronics and Mechatronics.
Our Position
As a Senior Software Engineer C#/C++/, you will work on applications within high-tech machine and equipment construction. The projects focus on different domains such as Medical, semiconductor, automotive or smart farming. You will be part of a team within the software development department. Passion for technology and fun is paramount. The projects are carried out at Sioux at the Development Center in Apeldoorn or at the client's location.
The following appeals to you:
- Design, develop, and optimize technical software in C# and/or C++
- Work on applications for medical systems, semiconductors, or analytical instruments
- Take ownership of architecture, version control, test automation, and CI/CD pipelines
- Collaborate in compact, technical software teams based in Apeldoorn or on-site with clients
- Discuss architecture and design decisions with engineers who speak your language
What could your next project be?
Project example: Local data analysis platform
For a client in the analytical industry, we developed a platform for real-time processing of large datasets from measurement equipment. The front-end tools for data exploration and user configuration were built in C#, while the compute core and synchronization logic run in C++ for maximum performance. Everything runs locally — no internet needed, no cloud dependencies.
Our employees are, of course, the best source if you want to know what it's like to work at Sioux, Read the story of Thijs , Ronald and Ali why they choose Sioux.
Your future workplace
Your Experience
- At least 5 years of experience as a software engineer in a technical environment
- Proficient in C# and/or C++, preferably both
- Familiar with real-time systems, memory management, design patterns, and software architecture
- A pragmatic engineer who takes ownership and delivers quality
- Fluent in Dutch (and English)
Why you’ll love working at Sioux Apeldoorn
- Working on pure software projects with technical challenges and real-world impact.
- No legacy maintenance, but forward-looking projects where you help shape the architecture.
- A technically-driven culture with a strong focus on quality, peer reviews, and test coverage.
- Flexible working, an informal atmosphere, and the freedom to shape your own path.
This is Sioux
At Sioux Technologies in Apeldoorn, We organize numerous activities for our employees, such as summer barbecues, innovative knowledge sessions, and enjoyable lunches or drinks. Additionally, we offer an inspiring working environment where you can work with dedicated professionals on challenging high-tech projects.
At Sioux Technologies, you work alongside the best technicians who, like you, are driven by a shared passion for technology. We offer:
- Internal training, coaching, and a large development budget of €6,000 per year
- A vitality budget for personal wellness activities
- Varied work due to a variety of technologies, markets, and projects
- A good salary and attractive fringe benefits
- Flexible working hours of 32-40 hours per week, both at home and in the office
- An open culture focused on collaboration, learning, and having fun
At Sioux, we believe in the combination of high-tech innovation, fun, and value creation. We can tell you all about our unique culture and the challenging high-tech projects, but we prefer to let our employees speak for themselves. Discover why they chose Sioux and how they develop here. Go to the testimonials of Thijs , Ronald and Ali to find out why they chose Sioux.