Senior Backend Developer

Sioux Group was founded in 1996 in the Netherlands. With over 1,400 engineers, Sioux supports or acts as the R&D partner of leading high-tech companies. We aim to add value to our clients by developing innovative and high-tech solutions that contribute to a smarter, safer, healthier, more enjoyable, and more sustainable society.

Sioux has been recognized as an employer of choice, including awards such as Best ICT Company to Work For and Great Place to Work. In addition to our strong presence in Europe, Sioux is rapidly expanding in Asia, with offices in Vietnam, China, Singapore, and India.

With a strong heritage and a diverse international team, Sioux is proud of our core values: Own it and make it happen, Grow and innovate together, and Surprise customers. If these values resonate with you, we would love to welcome you to our team.

The ideal candidate is mainly in charge of building and maintaining C#/Python software that controls machines and subsystems within complex diagnostic equipment — this is embedded/systems-adjacent software engineering, not pure application backend.
Key responsibilities:

• Design, implement, and maintain high-performance C#/ Python software components for machine and subsystem control within complex systems.

• Be part of a Kanban team delivering high-quality, maintainable software.

• Review and improve code quality through thorough code reviews and mentoring of other developers.

• Troubleshoot, analyse, and resolve complex software and system issues.

• Integrate software with hardware and control systems, ensuring efficient and reliable machine operations.

• Define and implement best practices in software design, testing, and documentation.

• Contribute to continuous improvement initiatives for software processes, performance, and usability. Software & System Troubleshooting

• Experience with Software installation, system setup, and configuration

• Diagnose and resolve issues across Windows- and Linux-based environments.

• Analyze system performance (throughput, latency, CPU, memory usage).

• Troubleshoot across software and hardware interfaces (controllers, sensors, stages).

• Work with logs, telemetry, and monitoring tools to identify root causes.

• Master's or Bachelor’s Degree in Computer Science, Software Engineering, Information Technology, or a related discipline.

• Minimum 5 years of experience in Backend Development with one of following programming languages, such as C#, Python, .NET

• Strong grasp of object-oriented design principles and scalable architecture.

• Proficient with multi-threaded and asynchronous programming.

• Familiarity with CI/CD pipelines, containerization (Docker), and orchestration tools (Kubernetes).

• Proficient understanding of GIT for versioning.

• Strong debugging, problem-solving, and optimization skills.

• Affinity with hardware and physical systems is a strong plus.

• Good command of spoken & written English.

• • 1st anniversary = 1 million

  • 3rd anniversary = 3 million

  • 5th anniversary = 10 million

  • 10th anniversary = 20 million

• Diverse company culture activities: Company trip, Annual Year End Party, Quarterly party, Company outings, Team building, Lunch & Learn Company anniversary, Family day, X-Mas party, Mid-Autumn, Snack Friday, Food and Snack in the fridge, etc

• Sports activities: Football & Badminton club

• Charity social responsibility activities

If you know someone who fits this position, please feel free to share this!