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

iconicchain Oy
2021-01 – present: Head of Devops and Security
Siili One Oy
2019-12 – 2020-12: Staff SRE
- Consultant, worked on embedded Linux systems
Tuxera Inc.
2017-04 – 2019-12: Release Engineer
- Development and maintenance of online build service used by customers, 400k–600k 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

Operating systems
- OpenBSD
- Various GNU/Linux distributions (Debian, Ubuntu, RHEL… you name it)
- illumos, Solaris 10, 11, OpenSolaris
Language preferences: C, 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
ZFS
Network security, eg. firewalls (pf, nftables, iptables), SSL/TLS, authentication and authorization
Configuration management: Ansible, Puppet
Porting, packaging, patching and contributing to open source software