10/13/2026 updated
100 % available
Senior Linux/UNIX Systems Engineer & Software Developer
Hyvinkää, Finland
Worldwide
-AI AgentsGitHub ActionsLLaMASystems EngineeringTest AutomationUnixCentOSLinuxDevOpsLinux On Embedded SystemsGitHubKali LinuxLinux KernelLinux AdministrationLinux-Powered Devices
UNIX/Linux Systems Administration
Broad expertise in UNIX and Linux systems administration across multiple distributions and platforms including Linux, MacOS, Solaris, AIX, and others. Proficiency in container technologies such as LXC, Docker, Podman, and Kubernetes (k8s/k3s), as well as cluster solutions like Solaris Cluster and Red Hat Clustersuite.
Programming & Software Development
Extensive programming knowledge covering C/C++, Java, LotusScript, Lotus Formula language, Sh-Scripting, PHP, Perl, Lisp, and more. Advanced knowledge of the GNU toolchain (gcc, binutils, gdb) and experience building cross compilers for various systems including OpenEmbedded, Borland C, Microsoft C++, and IAR toolchains.
AI & MCP Server Development
Development of custom MCP servers and similar tools for easier interaction with CI tooling. Self-hosting of LLMs via various frameworks including llama.cpp, ollama, and directly via pytorch. Providing introductions to AI best practices and basic concepts of how modern LLMs work.
Lotus Notes / Domino Administration & Development
Administration and development for Lotus Notes 4.5 through 6.5, including BCC admin tool and DB Intranet. Management of Domino servers under Linux, Solaris, and Windows, as well as building Domino clusters and migrating domains.
Network Protocols & Security
Advanced knowledge of IPv4, IPv6, DNS, DHCP, HTTP, and SMTP. Experience building firewalls using Linux (ipchains, iptables), OpenBSD (pf), and Checkpoint FW-1. Network and WLan security checks across various operating systems.
Automation with Ansible
Automation of physical and mixed environments using Ansible. Building and extending modular, customer-agnostic Ansible roles to support automation of initial deployment and management of lab resources, including support for self-hosted GitHub runners and ARC runners inside k8s.
CI/CD & Build Systems
Moving CI workloads from legacy Jenkins systems to GitHub Actions. Implementing GitHub actions for on-device testing on the AWS devicefarm. Enabling unified cmake-configured builds on fast Linux CI workers by wrapping Windows toolchains into scripts utilising wine.
Release Management & Project Leadership
Experience managing projects and leading project teams, familiar with V-Model and ITIL. Served as release manager responsible for definition of release processes and policies, and as SCRUM master for up to two teams.
Cross-Platform Development
Cross-platform development skills for portable C code for Windows and UNIX. Experience with Qt/KDE class library and developing tools that run across multiple operating systems.
Software Packaging
Packaging software in deb and RPM format as well as Solaris pkg. Building Debian packages and RPMs for Red Hat Enterprise Linux. Establishing apt-based repositories for custom packages.
Broad expertise in UNIX and Linux systems administration across multiple distributions and platforms including Linux, MacOS, Solaris, AIX, and others. Proficiency in container technologies such as LXC, Docker, Podman, and Kubernetes (k8s/k3s), as well as cluster solutions like Solaris Cluster and Red Hat Clustersuite.
Programming & Software Development
Extensive programming knowledge covering C/C++, Java, LotusScript, Lotus Formula language, Sh-Scripting, PHP, Perl, Lisp, and more. Advanced knowledge of the GNU toolchain (gcc, binutils, gdb) and experience building cross compilers for various systems including OpenEmbedded, Borland C, Microsoft C++, and IAR toolchains.
AI & MCP Server Development
Development of custom MCP servers and similar tools for easier interaction with CI tooling. Self-hosting of LLMs via various frameworks including llama.cpp, ollama, and directly via pytorch. Providing introductions to AI best practices and basic concepts of how modern LLMs work.
Lotus Notes / Domino Administration & Development
Administration and development for Lotus Notes 4.5 through 6.5, including BCC admin tool and DB Intranet. Management of Domino servers under Linux, Solaris, and Windows, as well as building Domino clusters and migrating domains.
Network Protocols & Security
Advanced knowledge of IPv4, IPv6, DNS, DHCP, HTTP, and SMTP. Experience building firewalls using Linux (ipchains, iptables), OpenBSD (pf), and Checkpoint FW-1. Network and WLan security checks across various operating systems.
Automation with Ansible
Automation of physical and mixed environments using Ansible. Building and extending modular, customer-agnostic Ansible roles to support automation of initial deployment and management of lab resources, including support for self-hosted GitHub runners and ARC runners inside k8s.
CI/CD & Build Systems
Moving CI workloads from legacy Jenkins systems to GitHub Actions. Implementing GitHub actions for on-device testing on the AWS devicefarm. Enabling unified cmake-configured builds on fast Linux CI workers by wrapping Windows toolchains into scripts utilising wine.
Release Management & Project Leadership
Experience managing projects and leading project teams, familiar with V-Model and ITIL. Served as release manager responsible for definition of release processes and policies, and as SCRUM master for up to two teams.
Cross-Platform Development
Cross-platform development skills for portable C code for Windows and UNIX. Experience with Qt/KDE class library and developing tools that run across multiple operating systems.
Software Packaging
Packaging software in deb and RPM format as well as Solaris pkg. Building Debian packages and RPMs for Red Hat Enterprise Linux. Establishing apt-based repositories for custom packages.
Experience
Professional experience10+ years
Freelancer since2016
Languages
GermanNative speakerEnglishFluent
Project history
Founded and running Aardsoft Oy. Customer projects include migrating legacy infrastructure into k3s, providing custom MCP servers for developers, providing introductions to AI best practices, adding support for deploying self-hosted GitHub runners, implementing GitHub actions for on-device testing on AWS devicefarm, moving CI workloads from Jenkins to GitHub Actions, enabling unified cmake-configured builds on Linux CI workers, implementing backup solutions, and building and maintaining a CI lab with strict access policies.
Various freelance projects including Linux/Windows administration for TASC GmbH Frankfurt, developing and managing a chat platform, packaging software for Solaris, integrating Solaris and Linux in OpenLDAP environments, synchronisation services for ofbiz using SOAP, building diskless clients for netboot using Debian Linux, and porting device drivers.
Release manager responsible for definition of release processes and policies. Middleware architect responsible for overall middleware development of SailfishOS. SCRUM master for up to two teams. Planning and implementing a developer beta program. Providing initial testing instructions and hiring methods for testers.