Tech Leader, CTO & Entrepreneur

Building and scaling tech companies for 18+ years—from first commit to global scale.
AI-savvy. Execution-obsessed. Built for hyper-growth.

About

I'm a technology-agnostic CTO and co-founder with deep experience across Fintech, MedTech, Health & Fitness, Logistics, and marketplaces.

I specialize in rapid execution and go-to-market—taking products from the first line of code through hyper-scaling and exit.

18+ years in tech and product leadership
2 successful exits (CleanAgents → Helpling, HelloCare → Pflegix)
Built and scaled teams at Caspar Health, Freeletics, Kontist, Neufund, Movinga, and early-stage startups

Sergiej Rewiakin — VP Engineering, CTO, Tech Co-founder. Berlin, Germany. LinkedIn: linkedin.com/in/sergiej. GitHub: github.com/SergejSoft.

Head Of Tech Caspar Health Apr 2023 – Present Digital rehabilitation, MedTech. Berlin.
Director Of Engineering Freeletics Feb 2021 – Feb 2023 #1 fitness app in Europe. Munich.
VP Of Engineering Kontist Jul 2019 – Feb 2021 Tax-free banking, bookkeeping, tax management. Fintech.
VP Engineering Neufund Jan 2018 – May 2019 Security tokens, blockchain. Berlin.
CTO senden24 GmbH Jan 2017 – Mar 2018 On-demand carrier service. Berlin.
Co-founder, CTO HelloCare.de Jun 2015 – Jan 2017 Exit to Pflegix. Elderly care marketplace. Hamburg.
Interim CTO Movinga Nov 2015 – Dec 2016 Marketplace for moving services. Berlin.
Founder, CEO CleanAgents.com Jun 2013 – Nov 2015 Exit to Helpling. Domestic cleaning marketplace. Berlin.
Founder TurnYourTime.com Jun 2012 – May 2013 Collaborative consumption. Berlin.
Sales Team Leader 9flats.com Jun 2011 – Jul 2012
European Tours Contiki Holidays Jan 2007 – Mar 2009 London.

Rapid execution and 0→1 mentality. I evangelize Agile product development with quick market rollout and in-flight learning.

Time to Deploy and Number of Deploys as core engineering KPIs—velocity, test coverage, lead to production.
Trust, ownership, and accountability as team values; empower teams to embrace risk and ambiguity while training recovery.
Prototype and innovate with lightweight tooling; break complexity into small executable tasks.
Methodology: One Week Sprint—ownership and accountability drive velocity. weeksprint.netlify.app

Strive for 59 min to MVP. 14 startups launched; 2 exited. Sustainable, tech-enabled culture from day one.

Exits: CleanAgents → Helpling (2015), HelloCare → Pflegix (2017)
PayPal Battlehack Winner 2013 (Clean Berlin app)
Certified Agile Leadership I (Scrum Alliance, 2020)
Key companies: Caspar Health (MedTech), Freeletics (Fitness), Kontist (Fintech), Neufund (Blockchain)

Let's talk about what we can build together. Ping me on WhatsApp or Telegram.