Senior Full-Stack Software Engineer m/f/d, Zug
For our client from the diagnostic environment, we're looking for an experienced and Senior Full-Stack Software Engineer (m/f/d) to join our team and play a key role in overhauling our instrument software's legacy GUI. You'll be instrumental in developing modern, robust, and compliant solutions across the full stack in a regulated environment. If you're passionate about both elegant front-end user experiences and resilient back-end architectures, we want to hear from you! start date: Nov/Dec 2025 or Jan 2026
end date: one-year-contract (with a chance onto extension)
workload: 80-100% - with max. 50% remote
location: Rotkreuz (CH)
work model: Contracting Your Key Responsibilities:
* Design, develop, and maintain high-quality software across the full stack for our core instrument software
* Play a key role in building and evolving robust back-end controllers using C#/.NET that interface with instrument hardware and handle data processing
* Implement the new front-end user interface using React and TypeScript, replacing the existing legacy GUI for instrument management
* Collaborate closely with project leaders, Testers, and other engineers to define, estimate, and deliver features
* Ensure all development practices and delivered software meet the stringent requirements of a regulated environment, including documentation, testing, and compliance standards
* Participate in code reviews, design discussions, and mentoring junior team members
* Diagnose and resolve complex technical issues, bottlenecks, and performance challenges related to software-instrument communication
Your Qualifications:
* 5+ years of professional software development experience
* Deep expertise with C# and the .NET framework (or .NET Core) for building backend services (e.g., RESTful APIs, device communication layers)
* Proficiency in modern front-end development using React (or a similar modern framework like Angular/Vue) and TypeScript
* Experience working in a regulated industry (e.g., Medical Devices, Scientific/Lab Equipment) with a strong understanding of compliance, security, and quality assurance best practices.
* Excellent communication skills in English and a proven track record as a versatile team player who thrives in a collaborative, cross-functional setting
Nice to have:
* Experience working with instrumentation
* Experience in tackling and successfully executing a legacy system overhaul or modernization project
* Knowledge of Linux operating systems, including shell scripting and system services, is valuable for deployment and debugging on the instrument
* Knowledge in the area of networking or cybersecurity
* Familiarity with secure coding practices
Sounds like a great job?
Then we look forward to receiving your complete application documents through our online application form.
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