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Salary
≈ $57k – $133k per year (Estimated)
Location
In office (Hanover)
Seniority
Middle · 3+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 13, 2026. First seen by Alion on Mar 26, 2025.

Overview
Company
Impact
Profile match
Hornetsecurity is a Hanover company founded in 2007 that secures email and Microsoft 365 environments. Its cloud services filter spam and malware, archive messages and back up cloud workloads for tens of thousands of businesses. The company has grown through acquisitions into one of the larger European security vendors.

Intro

The Hornetsecurity Group is the leading cloud security provider in Europe, protecting the IT infrastructure, digital communication, and data of companies and organizations of all sizes.

Join our fight against cybercrime and become part of the international team! We’re on the lookout for a highly motivated C# .NET Core Developer.

Your Job

  • 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 badguysdread. Working primarily with .NET Core, you will have a direct and immediate impact on the security of end-users.
  • You will build the backend systems that powerHornetsecurity‘sflagship product.
  • You will design and scale REST-based APIs and background services using technologies like .NET Core, Redis and RabbitMQ
  • You will write beautiful code accompanied by good documentation and coverage by integration tests.
Our tech stack:
  • Frontend: Angular, TypeScript,RxJS, HTML5, CSS3.
  • Backend: C#, .NET 8+, ASP.NET Core.
  • Storage and messaging: MariaDB, RabbitMQ, Redis, Elasticsearch,ClickHouse.
  • Infrastructure: GitLab, k8s, Kibana, Prometheus, Grafana.

Your Profile

  • You have 3-4 years ofexperiencein software development
  • You have strong background in C#/.NET Core development.
  • Expert knowledge in background data processing using message brokers and task queues.
  • Strong communicationskills with ability to efficiently deal with software requirements, questions,concernsand feedback in both directions.
  • You are fluent in English.

Your Benefits

  • Be part of a growing global company in one of the most dynamic industries - cybersecurity.
  • Short decision paths and flat hierarchies in an open working atmosphere.
  • Personal and professional development opportunities.
  • Home-office optionand flexible, trust-based working time.
  • Be-Active Bonus - allowance for membership in fitness and sports clubs.
  • Whether by car, public transport, or bike - we make your commute easier with free parking, a GVHJobCard(Hanover), a tax-free commuting allowance (Berlin), or bike leasing.
  • Employer contribution to the company pension plan.
  • Unlimited contracts - we’relooking for hornets to grow long-term with us.
  • Temporary Employee Exchange Program - opportunity to work at our global office locations (e.g. Malta, Madrid, Montréal, Washington D.C.).
  • Referral Bonus: €1,500 for every successful candidate referral.
  • Team events like laser tag, an escape room, or a get-together at our own legendary beer truck in Hanover - let yourself be surprised!
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