Esa-Petri Tirkkonen

Esa-Petri Tirkkonen

Operating Diagnostician · Fractional CTO/COO · Founder Mentor
Portugal · EU · Global delivery
Exec + Engineer
Business judgment and technical delivery. Same person. Same engagement.
50+ companies
Operating, technical, commercial, and delivery experience from inside the work.
Nearly 100 companies
Mentored through product, market, technical, and operating decisions.
Production AI
On-prem deployment, document intelligence, and automation, not demos.
What I do
I diagnose where companies are actually failing: across offer, market, sales, delivery, architecture, operations, and AI implementation. Then define what to fix first. When technical delivery is the right answer, I lead it personally.
How I work
First pass is always diagnostic: map what is broken, what cannot be fixed, and what AI will not solve. Then choose the shortest credible path to a working result. The diagnostic is the product; technology is one possible fix.
AI
Agentic pipelines, RAG at production scale, on-prem LLM deployment, document intelligence, multi-agent orchestration, and evaluation frameworks, built and maintained under data-sovereignty and compliance constraints. AI is useful only when it solves the actual constraint.
Mentoring
Nearly 100 companies mentored across product, market entry, technical delivery, and operating decisions. The work is not motivational coaching: identify the real constraint, separate symptoms from causes, and make the next decision concrete. Full approach: founder & operator mentoring.
Constraints
Regulated environments, data sovereignty, undocumented APIs, legacy codebases, and AI projects that have already failed once. Constraints are part of the work, not an excuse to avoid it.

Experience

Fractional CTO & Technical Lead

2025 - Present
Independent Practice · Europe · MENA · Americas · APAC

CTO & Lead Full-Stack Engineer

2023 - 2025
One Second AI · Helsinki

Technical Lead & Solutions Architect

2022 - 2023
Pegasi Oy · Madeira

CTO / Head of Software Production

2020 - 2022
CSIT Finland Oy · Helsinki

CEO & Lead Developer — UNI-HAID (TEKES)

2016 - 2018
LUT University / Med-Tech Startup · Finland
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