Curriculum vitae / Lauri Tirkkonen

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2008 – 2016: M.Sc. (Tech), Computer Science and Engineering at Aalto University School of Science (form. Helsinki University of Technology)
2007: matriculation at Outokummun lukio

Undisclosed fintech company in Japan
2022-04 – present: Site Reliability Engineer
iconicchain Oy
2021-01 – 2022-03: Head of DevOps and Security
- Building infrastructure (Hetzner cloud), supporting development (eg. creating tools to run dev workloads in hcloud), optimizing deliveries and Docker image builds, building CI/CD & improving test performance
Siili One Oy
2019-12 – 2020-12: Staff SRE
- Consultant; technical lead on an embedded Linux system project for a customer in the telecommunications industry
Tuxera Inc.
2017-04 – 2019-12: Release Engineer
- Development and maintenance of online build service used by customers, 400k–600k kernel module builds delivered per year
Aalto University Department of Computer Science and Engineering
2009-05 – 2011-05, 2011-09 – 2017-03: Systems Designer
- Unix (Solaris, illumos, Linux, OpenBSD) server and workstation administration. Xen and KVM virtualization, containerization with illumos zones
- Building and upgrading internal systems, migrating from legacy solutions. Examples:
  - LDAP authentication and name services
  - Puppet configuration management for workstations and servers
  - Redundant firewalls with pfsync and CARP
- Improving processes and workflows, eg. putting everything under version control, deploying an issue tracker
Eniram Ltd.
2011-05 – 2011-08: Software Developer
- Maintenance/development of custom Linux distribution
- Utilities and automation in Python and shell

Operating systems
- Various GNU/Linux distributions (Debian, Ubuntu, RHEL, CentOS, Alpine, Void… you name it)
- OpenBSD
- illumos, Solaris 10, 11, OpenSolaris
Language preferences: C (C99), Python, shell
Instrumentation and debugging
- bpftrace, DTrace, traditional debuggers like gdb, mdb
- traditional Unix visibility tools (strace/truss/ktrace, ps, netstat, vmstat, fstat, etc.)
TCP/IP networks in depth, including IPv6
Network security: firewalls (pf, nftables, iptables), SSL/TLS, authentication and authorization
Storage: ZFS (incl. send/receive based backup systems)
Containers: systemd-nspawn, podman, Docker, Solaris zones
Orchestration: Kubernetes
Configuration management: Ansible, Puppet, Terraform
Monitoring, alerting & visualization: Prometheus, Grafana, rrdtool, collectd, New Relic
CI/CD: git, Jenkins, GitHub Actions
Build systems: OpenEmbedded/Yocto, Android, GNU make, BSD make, CMake, Meson, GNU autotools
Porting, packaging, patching and contributing to open source software