Helmut Tessarek
Consultant at Self-employed
Toronto, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolHelmut Tessarek is a seasoned DevOps and Site Reliability Engineering consultant based in Toronto with 13+ years of experience designing high-availability, disaster recovery and observability-driven infrastructure across enterprises and cloud environments. He combines hands-on systems engineering (from DB2 performance tuning and SAP landscapes to Kubernetes, Nomad and HashiCorp stacks) with team leadership and a mentorship-first approach that formalizes SRE practices and runbooks. Helmut has a track record of building scalable telemetry and log pipelines (corporate-wide OpenTelemetry and the FluDump fluentd gateway) and automating deployment and configuration to eliminate human error. An active open-source contributor, he improves both backend and UI projects—from Redis admin tooling to Rust-based Vaultwarden and interactive shell tooling—showing a pragmatic focus on usability and operational robustness. His background in deep performance engineering at IBM gives him a rare blend of low-level tuning expertise and modern cloud-native reliability practices.
13 years of coding experience
15 years of employment as a software developer
Computer Science, Computer Science at Vienna University of Technology
English, German, French, Spanish
Stackoverflow
148reputation
57kreached
6answers
2questions
Github Skills (44)
database10
javascript10
database-api10
bootstrap10
apidoc10
redis10
history10
command-line-interface10
databases10
rocket10
php10
api10
argon2i10
command-line10
bootstra10
Programming languages (25)
Github contributions (5)
ForkAwesome/Fork-Awesome
Feb 2018 - Nov 2019
Role in this project:
Front-end Developer
Front-end DeveloperContributions:4 reviews, 37 commits, 14 PRs in 1 year 9 months
Contributions summary:Helmut primarily focused on updating the project's documentation and UI elements. Their contributions include showing the version number in the download modal, replacing Font Awesome with Fork Awesome in the "Get Started" page, and using variables instead of hardcoded text. They also fixed links to LESS and SASS files within the example pages and added and then reverted an attempt to integrate a CDN link and SRI hash calculation within the "Get Started" page. These changes indicate a focus on improving the user experience and maintainability of the project's documentation.
octiconsbootstrap-iconssvgcssbrands
dani-garcia/vaultwarden
Dec 2022 - Dec 2022
Unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs
Role in this project:Back-end Developer
Back-end DeveloperContributions:88 reviews, 13 commits, 19 PRs in 1 day
Contributions summary:Helmut primarily contributed to the back-end aspects of the Vaultwarden project. Their work includes adding features related to Argon2 key derivation functions (KDFs), modifying and updating API endpoints for enhanced functionality, and adapting code to facilitate secure user login procedures. In addition, the user addressed several code adjustments to facilitate configuration and the introduction of new features, which improved the performance and usability of the platform.
bitwarden-rsrustvaultwardendockerrocket
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