IT Sicherheit – frischer Wind
IT security – a breath of fresh air
Sécurité informatique – un vent de fraîcheur
Seguridad informática – un soplo de aire fresco
Hacker sind kreativ und finden immer neue Wege in Unternehmen einzudringen. Um Angreifern weiterhin einen Schritt voraus zu sein, braucht es immer wieder neue Ideen.

KALWEIT ITS – Wir bringen frischen Wind.
Hackers are creative and always find new ways to penetrate companies. To stay one step ahead of attackers, new ideas are always needed.

KALWEIT ITS – We bring a breath of fresh air.
Les pirates informatiques sont créatifs et trouvent toujours de nouveaux moyens de s'introduire dans les entreprises. Pour garder une longueur d'avance sur les attaquants, il faut sans cesse de nouvelles idées.

KALWEIT ITS – Nous apportons un vent de fraîcheur.
Los hackers son creativos y siempre encuentran nuevas formas de penetrar en las empresas. Para estar un paso por delante de los atacantes, siempre se necesitan nuevas ideas.

KALWEIT ITS – Traemos un soplo de aire fresco.

Penetration tester (m/f/d)

We are a young startup with a very clear mission: We want to rethink cybersecurity. As an independent consulting firm, we challenge the status quo of our customers’ IT security on a daily basis. We think cybersecurity in a new way, have bold ideas and implement our projects pragmatically.

…and – Curious?

By the way: Our job advertisements are mostly quite sporadic in terms of requirements or qualifications, as we are basically not looking for a personnel resource, but for a good addition to our existing team. Qualifications, professional experience and specializations are of secondary importance for the time being. Because we specialize in penetration testing, we generally find it easy to provide further training or to promote specialist skills.


  • Our customers, which include banking institutions, private health insurers, international construction companies, logistics companies and many more, commission us to identify attack vectors within their IT.
  • We perform perimeter testing, internal perpetrator testing, red teaming and many other types of offensive IT audits according to OWASP Testing Guide, PTES as well as BSI recommendations.
  • We often test software, sometimes hardware. Our projects are varied, always exciting and challenging.

Your Scope

  • Perimeter test
  • Client test
  • Inside offender test
  • Web applications
  • Application Software
  • Mobile applications
  • IoT devices
  • Automotive Test
  • Firewall and IDS Evaluation
  • u. v. m.

Who we are

We are a dynamic team with flat hierarchies. We are quite sure: Here you will quickly take on responsibility.

Open communication and direct feedback are very important to us. Flexible working hours and work location ensure that you can live pretty much anywhere in Germany. If you live in Hamburg, you benefit from a modern office in the heart of the city between the Binnen- and Außenalster and a coffee and soft drink free of charge.

Are you #hacktastic enough for the job?

If you want to know where to send your application, you have to look at the robot texts. Creativity and ingenuity are required here.


When you have solved the puzzle, you will receive our mail address especially for applications. We ask below for the following information to be provided:


– expressive and individual application letter

– Complete resume including references and proof of certifications obtained, if applicable.

– Include work samples (BugBounty) or alternatively test a few boxes at
THM, HTB or Vulnhub and document the work progress as if it were a real penetration test

– Police clearance certificate (not older than six months due to work in a security-relevant area and, if applicable, support of KRITIS customers)

As soon as we receive your application, we will review the submitted documents in a comprehensive selection process.