About Johannes
In for the long haul.
At first glance, deep tech and long-distance triathlon have nothing in common. Look closer and they share almost everything. Both take years to pay off, and both punish shortcuts. The hardest part of either isn't the start or the finish. It's the long, quiet middle, where nobody is watching.
I learned the physics first, then spent a decade building quantum computers and frontier AI. Training for Ironman and Xtreme triathlon taught me what that work never spelled out: pacing beats intensity, recovery is part of the plan, and discomfort is information, not a stop sign.
The path so far
- 2011PhD in quantum physicsRPTU Kaiserslautern
- 2011–2014PostdocHarvard Quantum Optics Center
- 2014–2015PalantirSoftware engineer
- 2015–2017LendUpData scientist
- 2017–2018Rigetti ComputingQuantum engineer
- 2018–2021OpenAIResearcher
- 2021–2023MerantixVP of ML Research
- 2023–2024nyonicCo-founder & CTO
- NowSPRIND & angel investorDeep-tech venture investing
A question of mindset
Putting in the boring grunt work.
Long-distance endurance sport isn't something you do on the side. It reshapes your weeks: early sessions, sleep, food, a year planned backward from race day. Building a deep-tech company asks for the same commitment. The launch and the finish line get the photos. Most of the work happens in between, in the unglamorous middle, and that's where you find out who you are.
- Jánošík Slovak Xtreme Triathlon3.8 km swim · 180 km bike, 2,600 m up · 42.2 km run, 2,800 m up · 2026
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Open on Instagram → - Ironman HamburgEuropean Championship · 2026
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Open on Instagram → - Ironman California2025
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Open on Instagram → - MIUT 40Madeira Island Ultra Trail · +1,500 m / −2,200 m · 2026
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Philosophy
Discomfort ≠ Danger
Untrained, your body sounds the alarm at about 65% of max heart rate. Trained, it stays calm up to about 80%. Every block of training moves that line, at work too: more load, same clear head.
Stay calm under load, read the data, then decide. That's also how I work with founders and investors.
See advisory