Experience

Rohde & Schwarz Cybersecurity

• Germany
• Computer and Network Security
• 1 - 100 Employee

• Senior Software Development Engineer

  • Jul 2022 - Present

  * Co-maintaining and extending Botan -- an open source C++ crypto library. - Adding quantum-resistent crypto algorithms, such as Kyber, Dilithium, SPHINCS+ - Auditing the library for continued approval by the German Federal Office for Information Security - Developed the TLS 1.3 implementation (shipping in Botan 3.0) - Providing support to users on GitHub and inside Rohde & Schwarz * Internal consulting on crypto protocols and their implementation * Co-maintaining and extending Botan -- an open source C++ crypto library. - Adding quantum-resistent crypto algorithms, such as Kyber, Dilithium, SPHINCS+ - Auditing the library for continued approval by the German Federal Office for Information Security - Developed the TLS 1.3 implementation (shipping in Botan 3.0) - Providing support to users on GitHub and inside Rohde & Schwarz * Internal consulting on crypto protocols and their implementation



neXenio

• Germany
• IT Services and IT Consulting
• 1 - 100 Employee

• Lead Security Engineer

  • Mar 2021 - Jul 2022

  • Leading neXenio's contributions to the BMBF-funded project KBLS: - Implementing the TLS 1.3 protocol - Helped to integrate the quantum-resistent Kyber algorithm• Mentoring other engineers on secure software development and supporting their professional growth• Developed cryptographic mechanisms for and supervised their implementation in the luca App, a privacy-preserving contact tracing tool used by German health authorities during the COVID-19 pandemic

• Lead Software Engineer

  • Jun 2016 - Feb 2021

  Led the client application team (six developers) of an end-to-end encrypted cloud file sharing solution. This client software is predominantly written in C++ with Qt/QML and implements the core of the solution's cryptographic functionality. In May 2021, it received a Common Criteria EAL2 certification by the German Federal Office for Information Security (BSI) -- BSI-DSZ-CC-1106-2021.



CERN

• Switzerland
• Research Services
• 700 & Above Employee

• Fellow

  • Jan 2014 - May 2016

  Lead developer of the CernVM File System server backend, software quality assurance and continuous integration engineer.- Design and production grade software feature development- Performance optimisation- Maintenance of legacy system components- Continuous integration and automated software testing- Development and support of auxiliary tools for monitoring and instrumentation- Supervision and education of new team members- Several seminars and workshop contributions

• Technical Student

  • Nov 2012 - Dec 2013

  Performance optimisation, maintenance and support of the CernVM File System- Production grade re-implementation of the CernVM-FS server backend- Parallelisation and performance engineering- Design and Implementation of cloud-based multi-platform testing- Support and consulting for CERN's CernVM-FS installations- Global infrastructure operations support

• Summer Student

  • Jul 2011 - Sep 2011

  Summer internship program for students working on CernVM File System - Prototyping a new backend infrastructure architecture (in production today) - Build system migration to CMake Summer internship program for students working on CernVM File System - Prototyping a new backend infrastructure architecture (in production today) - Build system migration to CMake