Curriculum vitae / Lauri Tirkkonen

Contact

• lauri@hacktheplanet.fi
• lotheac @ IRCnet and libera.chat

Languages

• Native Finnish
• Fluent English

Education

• 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

Work

• iconicchain Oy
  2021-01 – present: 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
• Assembly Organizing
  2010-12 – 2011-02: SystemsCrew/Function Head
  2010-08 – 2010-10: SystemsCrew/Field Engineer
  2008-08 – 2010-07: InfoCrew/Customer Support

Skills / experience

• 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, Docker, Solaris zones
• Configuration management: Ansible, Puppet
• Monitoring, alerting & visualization: Prometheus, Grafana, rrdtool, collectd
• 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

Other

• Tietokilta ry (computer science student organization) board member 2011
• Compulsory Finnish military service completed