Stefan Henseler
CEO & Founder at Synax GmbH
Basel, Basel-City, Switzerland
Summary
👤
Senior🎓
Top SchoolStefan Henseler is a Swiss founder and CEO with 14 years of systems engineering experience and a decade-plus track record in distributed systems and open source. He founded Synax after senior engineering and solution-architecture roles at organizations such as Glencore, Swiss Re, and itnetX, bringing enterprise-grade operational experience to product and service delivery. A hands-on contributor, Stefan has made notable backend and DevOps improvements to high-profile projects like HashiCorp's Packer—enhancing Hyper-V support—and extended Kubernetes logging with a Splunk HEC plugin. He combines low-level systems understanding (PowerShell, Go, VM builders) with pragmatic architecture work for large-scale environments. Based in Basel, he balances entrepreneurial leadership with active coding, validation, and testing practices that reduce production risk. His background blends formal software engineering education with long-term operational apprenticeship, which keeps his approach both practical and deeply technical.
14 years of coding experience
10 years of employment as a software developer
Bachelor of Science ZFH in Informatik, Information Technology - Software Engineering, Bachelor of Science ZFH in Informatik, Information Technology - Software Engineering at ZHAW School of EngineeringProfessional Baccalaureate technical option, Professional Baccalaureate technical option at GIBM - Gewerblich Industrielle Berufsschule Muttenz
Github Skills (15)
splunk10
powershell10
kubernetes10
logging10
kubernetes-operator10
go10
hyper-v10
kubernetes-pods10
cloud-native9
automation9
automations9
infrastructure-as-code8
configuration-management8
json8
build-automation8
Programming languages (10)
Github contributions (5)
kube-logging/logging-operator
Mar 2020 - Nov 2021
Logging operator for Kubernetes
Role in this project:
Back-end Developer
Back-end DeveloperContributions:18 commits, 2 PRs, 5 comments in 1 year 8 months
Contributions summary:Stefan primarily contributed to the development of the Splunk HEC output plugin for the Kubernetes logging operator. Their work involved adding new properties and fixing property names within the `splunk_hec.go` file. The user also focused on improving the plugin's functionality, including changes related to metrics and transport configuration, while also adding validation and testing capabilities. The contributions included changes to the `output_types.go` and the generated CRD files for the logging operator.
kubernetesloggingoperatorcloud-nativekubernetes-operator
hashicorp/packer
Feb 2018 - May 2018
Packer is a tool for creating identical machine images for multiple platforms from a single source configuration.
Role in this project:Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:8 commits, 4 PRs, 18 comments in 2 months
Contributions summary:Stefan's commits primarily focused on enhancing the Hyper-V integration within the Packer tool. They added support for configuring Hyper-V disk block sizes, addressed missing parameters for Generation 1 VMs, and introduced options for specifying secure boot templates. The changes included modifications to PowerShell scripts, the Go codebase for builder configurations, and the driver mock implementation, demonstrating contributions across multiple areas of the project's backend and integration with the Hyper-V environment.
packer
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