Senior Full-Stack Software Engineer

Job Description
As a key member of a diverse and international SW Development Team of 10+ Engineers developing software for medical instruments, the Full Stack Software Engineer will play a key role in overhauling our instrument software's legacy GUI.

The SW Engineer will be instrumental in developing modern, robust, and compliant solutions across the full stack in a regulated environment.

Your Responsibilities Would Include The Following

• 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.

About The Customer
This is a contract starting by 1 Jan 2026 running for 12 months, with good chance of extension. The work place in Rotkreuz, with 50% WFH offered.

Requirements
The perfect candidate brings minimum 5 years of professional software development experience and additionally deep expertise with C# and the .NET framework for building backend services. Also we are looking for someone with strong communication skills in English and a proven track record as a versatile team player.

In order to be considered for this role, you will possess the following skills and experience:

• 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 (fluent) 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.

Compensation Benefits
Please note interviews would be conducted via video call, however the role is based 100% in Switzerland. Our client offers:

• Home office 50%
• The opportunity to work in a diverse and international environment on a long-term basis
• Modern location in Rotkreuz (40 mins direct train from Zurich)

Please note that our client will give preference to locally based candidates in Switzerland.

Are you If you're passionate about both elegant front-end user experiences and resilient back-end architectures, we want to hear from you

Then apply before the deadline on Monday 20 October (including university diploma and written references if possible) We look forward to receiving your full application.