IT engineer with electrical background.

I’ve graduated with thesis on ACARS signal demodulation. After that, during 10+ years at Red Hat as QA across RHEV-M, OpenStack, and ManageIQ I’ve reported 3 CVEs including a DOS vulnerability and Remote Code Execution with priviledge escalation, cooperated on over 200 bug fixes, and contributed to GitHub’s Arctic Code Vault.

More recently I’ve done development work - delivering a Debian 12 automatized upgrade path on UniPi controllers, implementing parallelized Modbus reading, and contributed a Podman compose fix for SELinux systems. On the leadership side, I’m coach by ICF standards and taught Python at Czechitas.

📞 Contact

Name	Jaroslav Henner
Tel	+420 725 580 001
E-mail	jaroslav.henner@gmail.com
LinkedIn	https://www.linkedin.com/in/jaroslav-henner-47a3978b/
Web	https://koucove.github.io/
IČO	19458568

☆ Technical Skills:

• IT Development Skills: Proficient in Python, Linux, Bash, javascript
• Virtualisation & Cloud skills: QEMU-KVM, libvirt, Docker, Openshift (Kubernetes), Azure, VMWare;

People skills:

• Coaching by ICF standards, Nonviolent communication

🎓 Education

• Student on Erasmus @ Tampere University of Technology, Finland - Tampere; 📅 Autumn 2009

• Engineer (Ing) @ Vysoká škola báňská, Technická univerzita Ostrava, Česká republika - Ostrava; 📅 2004 – 2010

• Student @ Střední průmyslová škola Mohelnice @ Česká republika - Mohelnice; 📅 2000-2004

Courses & Certifications:

• Convolutional Neural Networks
• Structuring Machine Learning Projects
• Neural Networks and Deep Learning
• Improving Deep Neural Networks: Hyperparameter Tuning, Regularization and Optimization
• AI For Everyone
• Fundamentals of Containers, Kubernetes, and OpenShift
• Developing APIs with Google Cloud’s Apigee API Platform
  • API Security on Google Cloud’s Apigee API Platform
  • API Design and Fundamentals of Google Cloud’s Apigee API Platform
  • API Development on Google Cloud’s Apigee API Platform
• Electrician exham according to Czech Law no. 194/2022
• Other Certificates
• RHCSA course.

💼 Work experience

Developer @ Easycon, Brno; 📅 August 2025 - February 2023

• Prepared an semi-automatic upgrade path for OTA update of UniPi over 2 versions of Debian. ✅ Impact: Enabled use of Debian 12, improving security and enabled to use newer software packages.
• Resolved race-condition in a project with multiple subprocesses: ✅ Impact: Complete elimination of sporadic corruption of mmaped regions of memory, improving reliability and resource utilization.
• Implemented parallelized reading from Modbus devices: ✅ Impact: Enabled efficient data collection from multiple devices, improving performance and scalability of the system.
• Added type-checking hints and pydantic object models. ✅ Impact: Preventing introduction of errors, IDE provides more relevant suggestions, better documentation of configuration structure, and improved maintainability of the codebase.
• Restructured the project and changed python import statements to absolute imports of whole modules. ✅ Impact: Improved maintainability, IDE support, reduced risk of circular imports, enabled faster code navigation and thus faster onboarding of new developers.
• Implemented unit-tests using pytest and GitHub Actions. ✅ Impact: Base for future refactoring of the codebase to decrease internal coupling and increase maintainability, and help preventing regressions in the future.
• Contributed to Podman Compose ✅ Impact: Enabled to use podman secretes on Selinux enabled systems.
• Found the root-cause of a memory leak in production code.

Freelance Handyman; 📅 February 2023 - August 2025

• Home repairs, maintenance and renovation projects.

Technical support and development @ Unipi technology, Brno; 📅 December 2022 - February 2023

• Gitlab to Github mirroring tool
• Customer care
• CPU loader with feedback loop to control the load.
• Testing Mervis - Integrated development environment for PLCs

💼 Teacher assistant @ Czechitas; 📅 July-2022 - December 2023

• Teaching women programming in Python.

💼 Quality assurance engineer @ Red Hat, Brno; 📅 January 2011 - June 2022

• Automation and testing of Manage IQ, OpenStack, RHEV-Manager
• Total 283 Bugzilla contributions driven to fixing the product and improving its quality. ✅ Impact: Contributed to improving the quality and reliability of the product.
• Arctic code vault contributor
• Securely published 3 CVEs. ✅ Impact: Contributed to improving the security of the product and protecting our customers, proven ability to identify and responsibly disclose security vulnerabilities. CVE-2013-4261, CVE-2014-2573, CVE-2019-14894
• Contributed with 128 PRs in Manage IQ opensourced tests repo ✅ Impact: Contributed to improving the quality and reliability of the product by adding tests, fixing automation bugs, and improving test infrastructure.

💼 Windsurfing instructor @ F4 WS school and rental, Pasohlávky; 📅 2016-ish - 2020

• A leisure time for summer weekends that keeps paying out as I got few of the informal people teaching practice and skills.
• Mostly instructor teaching the basics skills needed to start windsurfing safely, get back from the point where one started with the board…
• Worked with small groups of people - Usually about 5 people. Few times I worked with children. I mostly worked as a private coach for 1-3 adults.
• Boards maintenance.

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