Senior Security Developer (w/m/d) Ref 105972

For our client based in Essen we are looking for a freelance Senior Security Developer (m/f/d).


#Key Facts:

* Start: asap
* End: 31.12.2025
* Location: Essen/ Remote (50/50)
* Fulltime
* Contract: Freelance

#Tasks:

* Improve security of applications
* Analyse and identify potential vulnerabilities (or risks) in the development of applications or services via Threat Modelling/ Backup & Recovery/ Encryption and derive the necessary measures
* Refactor existing code to follow security guidelines
* Improve security skills in the squad in Threat Modelling, Backup & Recovery, Encryption and Pen Testing
* Participate in code reviews and provide constructive feedback to team members to train them
* Troubleshoot and debug software issues, ensuring secure software development

#Skills:

* Very good experience with Threat Modelling
* Extensive knowledge in C#
* Experience in SQL Server Administration
* Experience in AWS
* Experience in Terraform
* Experience in Qualys, Checkmarx, Azure DevOps Server is a Plus