Senior Software Engineer

About the Position

Our leading-edge expertise, software, and electronics enable organizations to make scientific breakthroughs, deliver state-of-the-art cancer treatments, develop healthcare innovations, and bring clean fusion energy to the world.

In this role, you’ll help build software for complex medical devices-where integration, regulation, and reliability are non-negotiable. We’re looking for a senior engineer who prefers ownership over hand-offs: shaping system requirements and architecture, treating risk management as part of design, and driving work through verification & validation and commissioning. You’ll tackle multi-subsystem integrations and multiple software interfaces with medical-grade documentation and disciplined engineering processes.

Responsibilities

• Design and develop software for medical systems (radiotherapy) and research systems (particle accelerators).
• Own the full lifecycle: requirements → architecture & design → implementation → verification & validation.
• Work on complex, multi-component architectures and integration across systems, dataflows, and workflows.
• Collaborate in a cross-functional team (software, testers, integrators, systems engineers) and act as a technical interface for international customers.
• Take ownership of software quality (tests, reviews, reliability) and drive solutions to completion.

Requirements

• 5+ years of software engineering experience; strong OOP foundation (C++ preferred; Java/C# also welcome).
• A proactive, delivery-oriented mindset: comfortable working in less rigidly defined environments and driving clarity where needed.
• Proven experience delivering customer-facing solutions: understanding requirements, communicating clearly, and making sound technical decisions.
• Strong analytical skills, autonomy, and willingness to learn new technologies and domains.
• B.Sc. in Computer Science, Electrical Engineering, or other related technical disciplines, or five years of related experience and/or training.
• Fluency in spoken and written English.

Nice to Have

• Experience with embedded / IoT / device-layer integration, PLCs/controllers, middleware or communication frameworks (e.g., MQTT).
• Experience in regulated environments (medical or similar), including technical documentation and disciplined engineering processes.
• Comfortable switching between architect and hands-on developer roles; strong system architecture & design patterns.

We Offer

• Employment contract for an indefinite period with a six-month probationary period.
• A work environment with flexible working hours and a hybrid work model.
• Plenty of personal and professional growth opportunities combined with a competitive and periodically updated salary tailored to your skills, experiences, and results.
• Interesting work full of challenges in an international working environment.
• Opportunities to work abroad.
• High-impact learning culture: regular in-house and external training sessions and a team of international professionals eager to help you grow.
• Many recreational after-work activities, additional health insurance (Specialists+), unlimited coffee, soft drinks, fruit, and other well-being goodies.
• Cosylab events (Teambuilding, New Year’s Party, Picnic … ).

About the Company

We are the leading software solutions provider for the world’s most complex, precise, and advanced systems, such as particle accelerators, large telescopes, fusion reactors, innovative medical devices, and cancer treatment systems. Our technology enables organizations to make scientific discoveries, offer the most cutting-edge cancer treatments, innovate in healthcare, and introduce clean fusion energy to future energy markets.

Working at Cosylab is a great opportunity to discover genuine teamwork and collaborate with experts from the world’s most important research projects. We value and strive to achieve good interpersonal relationships and try to ensure the pleasant well-being of all our employees. We are friendly, proud to work together, and able to develop just about any solution we put our minds to.

Our Values

• Think bold: We deliver exceptional solutions through courageous thinking, open communication, and the drive to continuously improve.
• Be modest: We set our egos aside in actively listening, respecting one another, and embracing the diversity of experience and perspective across the company.
• Work smart: We know we get more accomplished by working together, being accountable, focusing our efforts, and going the extra mile.
• Enjoy life: We prioritize balance and positivity, nurturing personal wellness and celebrating successes.
• Do good: We support one another and are passionate about solving the difficult problems that ultimately help make the world a better place.

Apply

Please fill in the application form and upload your English CV, motivational letter, and other relevant documents.

Apply for Senior Software Engineer by Monday, 13 July, 2026