Work Experience

• Red Team / IT-Security (Freelancer), Synatix GmbH

  Jan, 2026 - Mar, 20262 months

  Pentests and Security Consulting

  • Pentest of an ad platform

  • Security recommendations based on BSI and OWASP

  • Performance recommendations based on issues found while auditing for security

  • Python, ZAP (Zed Attack Proxy), curl, testssh.sh

• DevOps Engineer / Developer / Product Owner (Freelancer), 50Hertz GmbH

  Jan, 2024 - Jul, 20251 year 5 months

  Started working as a senior DevOps Engineer and worked closely with developers, IT-security and as interims product owner.

  • DevOps engineer for a platform used for managing the German power grid

  • Developed a self-service platform for developers to simplify deployments

  • Optimized cloud resource usage

  • Improved storage, databases and Apache Kafka resiliency

  • Organized further development of the platform as interims PO in an agile environment

  • Kubernetes, Git, ArgoCD, Azure Cloud, Go, Python, Rust, Microservices, Kafka, Azure DevOps, ArgoCD, CI/CD Pipelines, Docker, Keycloak, PostgreSQL, SQLite, JWT, OIDC, Terraform, Elasticsearch, Graphana, Loki, Prometheus, REST, Linux, HTML, CSS, JavaScript

• Core Backend Engineer / Senior Rust Developer (Freelancer), Payward Inc. (Kraken)

  Jan, 2022 - Dec, 20243 years

  Worked as a senior Rust developer in the core backend engineering department. Implemented various portfolio security mechanisms e.g. customer facing IP allow and deny lists.

  • Rust engineer for portfolio services

  • Enterprise customer features and security improvements

  • Performance improvements by converting legacy PHP to Rust

  • Implemented materialized views for portfolio management

  • Rust, Git, Terraform, CI/CD Pipelines, GitLab, Python, Kafka, Linux, MariaDB, SQLite, Redis

• Security Orchestration Automation and Response (Freelancer), KfW - Kreditanstalt für Wiederaufbau

  Jan, 2020 - Dec, 20211 year 11 months

  Build a data aggregation platform to improve visibility and detection of it security threats.

  • Developing internal tools for aggregating and enrichment of security alerts

  • Administration of the SOAR-Platform (TheHive and Cortex)

  • Automation of response playbooks for security alerts

  • Coordination of data collection and analysis throughout the company

  • TheHive, Cassandra, Kafka, ArgSight Siem, Git, Go, Linux, JavaScript, HTML, Redis

• DevOps Engineer, VHV Allgemeine Versicherung AG (Freelancer)

  Jan, 2021 - Aug, 20217 months

  DevOps Engineer for the customers backend platform

  • Zero downtime deployments to ensure availability of the insurance platform

  • Stability and uptime improvements of the backend

  • Performance improvements to comply with search engine timings

  • Architectural reviews

  • Extending and improving the deployment processes

• Head of Cyber Security, Ciphron GmbH

  Apr, 2017 - Dec, 20192 years 8 months

  Red team operations, code audits and security awareness workshops

  • Teamlead of a team of seven people

  • Red team attacks at financial institutions e.g. Volksbank

  • Security tutorials after successful social engineering attacks

  • Physical security audits

  • Code audits and recommendations in combination with pentests

• Software Engineer, Esdenera Networks GmbH

  Aug, 2015 - Mar, 20171 year 8 months

  In charge of software and appliance testing, UX improvements and software development in C

  • OpenBSD based firewall development

  • C source code audits, programming and improvements

  • Improvements to OpenBSDs network stack and open source code

  • Installation of appliances at customers

• Software Engineer, Qabel GmbH

  May, 2013 - Jul, 20152 years 2 months

  Software development and systems design on the AWS cloud platform

  • Implementation of distributed systems for AWS based deployments

  • AWS S3 integration into the storage platform

  • Development of secure messaging for customers

  • AWS cost reduction and planning

Projects Experience

• NORD/LB

  Jan, 2018 - Dec, 201811 months

  IT Security Consultant

  • Improving the IT sec departments response time

  • Coordination of pentests

  • Presenting pentest results and recommending improvements

• Argentum

  Jan, 2018 - Dec, 201811 months

  Go developer

  • Developing a blockchain based stable coin

  • Go, PostgreSQL, REST

• OpenBSD

  Jan, 2015 - Present

  Open source

  • C programming

  • Documentation

• Void Linux

  Mar, 2013 - Jun, 20152 years 3 months

  Open source

  • Linux

  • Packages

  • Maintainer

Skills

Education