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Hornetsecurity Logo Hornetsecurity · IT - Software Development

Senior C# .NET Core Developer

Germany · Job Posted March 19, 2026
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Job Description

Join our fight against cybercrime and become part of the team! We’re on the lookout for a highly motivated C# .NET Core Developer. You will join a team of diverse specialists and create the core of what makes our products successful: A malware protection solution that our users love and bad guys dread. Working primarily with .NET Core, you will have a direct and immediate impact on the security of end-users.

Job Responsibility

  • Build the backend systems that power Hornetsecurity‘s flagship product
  • Design and scale REST-based API endpoints using technologies like .NET Core, Redis and Docker Swarm
  • Write beautiful code accompanied by good documentation and coverage by integration tests

Requirements

  • Experience in software development – at least 7 years
  • Strong background in C#/.NET Core development (5+ years)
  • Expert knowledge in background data processing using message brokers and task queues
  • Strong communication skills with ability to efficiently deal with software requirements, questions, concerns and feedback in both directions
  • Fluent in English

What we offer

  • Free space for innovation and independent action in a fast-growing international company
  • Temporary Employee Exchange Program – we provide the ability for you to work at our global office locations and explore the world (e.g. Berlin, Madrid, Malta, Montréal, Washington D.C.)
  • Home-office-option and flexible working time
  • Having a peak? – We’ll provide you with free overtime food!
  • Team events like Laser Tag, Office Movie Nights, Foodie Fridays and much more – let yourself be surprised!
  • FitKit subscription and private insurance for your health!
  • Unlimited contracts – we’re looking for hornets to grow long-term with us
  • Referral Bonus: we pay 1500€ for each referral who is successfully hired by us!
  • And, of course, the usual standards such as development opportunities, coffee, tea, soft drinks & fresh fruit, office dogs, no dress code and much more!
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