Patrik Kernstock
Dedicated Technical Support Engineer 3
Lower Austria
Summary
🤩
Rockstar🎓
Top SchoolPatrik Kernstock is a seasoned Technical Support Engineer with 13 years of hands-on experience in system administration, backend development and DevOps, currently supporting public sector customers in Germany. He combines deep operational expertise with security-minded engineering—improving certificate automation, hardening mail and PKI flows, and contributing to projects like Nextcloud, dnscontrol and mailcow. Comfortable under pressure, Patrik has resolved Severity-1 incidents for vSAN and central VMware services while also helping maintain and modernize complex open-source codebases. His toolkit spans PHP, Go, Bash and infrastructure-as-code, and he brings practical cross-vendor troubleshooting across storage, networking and platform services. A perfectionist and lifelong tech enthusiast, he pairs pragmatic problem-solving with an eye for robustness, having addressed race conditions and subtle edge cases in production tooling. Based in Lower Austria, he balances professional rigor with hobbies in series and gaming, which he says keep his pattern-recognition sharp.
13 years of coding experience
9 years of employment as a software developer
IBM AS/400, IBM AS/400 at Schule für EDVFacharbeiter, IT-Informatik, Facharbeiter, IT-Informatik at Landesberufsschule Pöchlarn
German, English
Github Skills (37)
cloudflare10
docker10
cert10
python10
php-fpm10
back-end-development10
scripting10
letsencrypt10
post10
it-security10
command-line-interface10
dockers10
security10
automation10
php10
Programming languages (18)
Github contributions (5)
StackExchange/dnscontrol
May 2019 - Aug 2022
Infrastructure as code for DNS!
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:5 reviews, 39 commits, 30 PRs in 3 years 3 months
Contributions summary:Patrik primarily contributed to the back-end functionality of the dnscontrol project, with a focus on integrating and supporting various DNS providers such as Cloudflare and OVH. They added support for new record types like SSHFP and TLSA and fixed bugs related to existing functionalities. The user also demonstrated DevOps skills by modifying the build process and updating documentation to reflect the changes.
dnscontroldnsdslproviderssynchronize
avinetworks/devops
Jun 2021 - Aug 2022
Examples scripts for different environments to build and manage Avi Vantage
Role in this project:DevOps Engineer
DevOps EngineerContributions:5 reviews, 28 commits, 3 PRs in 1 year 2 months
Contributions summary:Patrik primarily contributed to the `cert_mgmt/letsencrypt_mgmt_profile.py` script, which is likely used for automating certificate management via Let's Encrypt. The contributions focused on enhancing the script's functionality and robustness, including improvements to token validation, handling of virtual hosting scenarios, and automated cleanup processes. The user also addressed race conditions and provided options to disable checks, reflecting a focus on improving the script's operational reliability within the Avi Vantage environment.
pythonautomationavienvironmentsvantage
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