About

Leonidas Tsementzis photo I’m Leonidas Tsementzis, a software architect, technical advisor and angel investor living in London, UK.

For more than a decade, I’ve been helping early stage startups build their initial products, achieve product market fit and build their core product and engineering teams.

Lately I’ve been working with startups and scale-ups as a fractional and interim CTO (fCTO), providing stategic, practical advice and hands-on help.

Previously I was CTO at Forward Partners, an early stage VC fund and venture builder, helping early stage startups with funding and hands-on product development. I joined Forward when we raised our first fund back in 2014 and moved on after we were succesfully listed in the London Stock Exchange.

You might know some of the companies I’ve been involved with:

  • Forward Partners - A Forward thinking VC
  • NXTLVL - Prepare your K12 students for the AI era with complex, team-based missions
  • Paynest - Financial wellbeing for every employee
  • Lateralus Ventures - Building and accelerating ventures
  • Would you rather be - The AI-poweredcareer planning platform
  • Robin AI - The AI Copilot for your Contracts
  • Patch - Plants made easy
  • Ahauz - Unlock the hidden value of your home equity to fuel your aspirations
  • EmpowerRD - Streamline Your R&D Tax Credit Claim
  • Breedr - Track & optimize individual cattle performance through the entire supply chain
  • Edge Retreats - Access the world’s finest luxyry villas
  • Baby2Body - Your most trusted resource for fertility, pregnancy, and postpartum
  • Netrobe - Your online personal stylist
  • ATCOM - From digital to purpose

Let’s talk

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