Esa-petri Tirkkonen
Fractional CTO & Technical Operating Partner
Santana, Portugal
Summary
👤
Senior🎓
Top SchoolEsa-petri Tirkkonen is a seasoned fractional CTO and technical operating partner with 13 years of experience embedding into scaling companies to drive AI implementation, operational turnarounds, and cross-market expansion across EU and MENA. He blends hands-on engineering and executive leadership—having run simultaneous CTO/COO roles—delivering custom LLM agents, full-stack products, and rapid time-to-value for clients. A founder with full P&L experience, he consistently aligns technical architecture with commercial outcomes, optimizing for unit economics rather than technical novelty. His background ranges from low-level signal processing and Android NDK work in academic projects to cloud-native AI stacks (Python, LangChain, React, Node.js) and pragmatic infrastructure cost optimization. An active open-source contributor, he has enhanced terrain generation for the Terasology voxel engine, showing a continued curiosity for system-level problems and playful experimentation. Fluent in operational discipline forged on family farms and early-career ops roles, he brings a rare mix of executional grit and strategic product sense.
13 years of coding experience
8 years of employment as a software developer
Japanese Language and Japan Studies Program (JLSP), Japanese Studies, Japanese Language and Japan Studies Program (JLSP), Japanese Studies at 日本大学 - Nihon UniversityBachelor’s Degree, Computer Software Engineering, Bachelor’s Degree, Computer Software Engineering at LUT University
English, Spanish, Japanese, Finnish, Swedish, Portuguese, German
Github Skills (11)
javas10
game-development10
game-engine10
3d-engine10
game-dev10
java10
voxel9
ui-design9
front-end-development9
uid9
sandbox8
Programming languages (4)
Github contributions (5)
MovingBlocks/Terasology
Dec 2012 - Nov 2014
Terasology - open source voxel world
Role in this project:
Back-end Developer
Back-end DeveloperContributions:32 commits, 1 PR, 1 comment in 1 year 11 months
Contributions summary:Esa-petri primarily contributed to the game engine's terrain generation capabilities within the Terasology repository. They added a noise interface, implemented WhiteNoise, EPNoise, and MultiTerrainGenerator classes, expanding the terrain generation options. Furthermore, the user integrated these changes into the game's UI, allowing users to select different terrain generation algorithms. This involved modifications to existing Java code and UI elements, enhancing the game's world-building features.
gamegamedevsandboxgame-developmentvoxels
Terasology/BoundlessWorlds
Dec 2014 - Feb 2015
World generation framework
Contributions:4 commits, 3 pushes in 2 months
world-generationframework
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