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C# Frontend Developer

2 weeks ago

Ljubljana, Ljubljana, Slovenia Cosylab Full time €35,000 - €60,000 per year

Are you passionate about medical technology and ready to make a real impact on the lives of cancer patients? If you have strong experience in C# programming, enjoy tackling the challenges of front-end development, and value the opportunity to work with an authentic and dynamic team, we want you to be a part of our journey towards transforming cancer treatment.

About the role

You will join our front-end team, a key part of the core application group, working on the development of an innovative cancer therapy software product. This groundbreaking project brings together multiple distributed components and complex workflows, offering a dynamic and rewarding opportunity to make a meaningful impact in radiation oncology.

Key tasks and responsibilities

  • Development of a frontend GUI desktop application for a cancer therapy software.
  • Participating in code reviews, and overall teamwork.
  • Documenting and thoroughly testing your work.
  • Validating and verifying the work done by the other team members.

Required qualifications and skills

  • Proficiency in C# with 3+ years of professional experience.
  • Demonstrated competency in WPF (or similar desktop application framework) using the MVVM pattern.
  • Good knowledge of software design, programming techniques, and computer science fundamentals.
  • Familiarity with source control (Git), CI/CD, code analysis, and other modern programming practices.
  • Developed communication skills and an open mind for discussion and team collaboration.

Education

  • B.Sc. in Computer Science, Physics, Electrical Engineering, Mathematics, or other related technical disciplines.
  • Fluency in spoken and written English.

Bonus points if you have:

  • Experience with relational databases (PostgreSQL, MSSQL, etc.).
  • Knowledge of other programming languages (Python, PowerShell, etc.).
  • Experience in concurrent and distributed systems.
  • Understanding of functional programming.

What 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, unlimited coffee, soft drinks, fruit, and other well-being goodies.
  • Cosylab events (Teambuilding, New Year's Party, … ).
  • Casual atmosphere with friendly faces where you can completely "be yourself."

You will fit perfectly if you share these 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 difficult problems that ultimately help make the world a better place
    .

Apply latest by Monday, 6 October 2025. Your application should include:

  • CV,
  • brief motivational letter and
  • potential recommendations or references.

We're looking forward to meeting You

The Cosylab Team