Hi, my name is Klaus Breyer.

Klaus Breyer

I am a CTO and Startup Founder/Advisor, living in Berlin.

If you want to launch a tech company or a digital product, we should talk. I offer MVP Sprints, build the first version of a software by myself and also, later on, the team around it. 

For startups in the scaling phase, I am available as an advisory board member for permanent sparring, but can also fill the CTO position for a limited time. 


I do not only build software, I take ownership – being a startup founder and good technical all-rounder with 10 years of experience (Agency / SaaS / B2B / B2C / E-Commerce / Apps). 

My founding experience allows me to bring in a lot of knowledge at the beginning of a product or company, during the strategy phase. And through my technical side, I am also experienced with the implementation phase. As a social type and good all-rounder, I can also talk to all trades and experts in between (product, design, marketing, operations), steer them and provide input. 

But most of all, I love to actually build stuff for the web by myself. 

For mobiles, desktops and clouds. 

Buzzword bingo

  • Software engineering background before going into digital marketing
  • Owner of the companies technical vision / stack & architecture
  • Leadership of technical teams up to 25 People 
  • Building ecosystems and APIs while being an evangelist for them by myself
  • Fostering an innovation culture & continuous improvement of developer tools for  productivity (also for remote teams) 
  • Managing Director for bootstrapped and venture backed companies as well.
  • With a strong relentless startup-approach on business strategy & product leadership

Service offerings

Companies founded

  • 2018 – Now: Member of the Advisory Board at vitalfunktion GmbH, offering B2C and B2B solutions in the area of pharma.
  • 2018 – 2019: Founder and Chief Prototyping Officer of the B2C E-Commerce Startup Fotando GmbH, pursuing the ambitious goal of massively disrupting the mobile customer journey for photo printing (from hand to wall!). 
  • 2016 – 2018 Founder and Chief Technology Officer of Influencer-Marketing SaaS BuzzBird GmbH (venture backed, 25 FTE), connecting brands and influencers for advertising campaigns through an machine learning based matching algorithm. 
  • 2010 – 2015: Founder and Managing Director Technology of the social media agency buddybrand GmbH (bootstrapped, 40 FTE), Germany’s first Facebook agency, which has evolved into a full service digital creative agency.

Freelance activities

  • 2019 – Now: Technology Principal for Ray Sono AG, building a MVP for an industry customer. 
  • 2016 – Now: Technical Evangelist for Native Studios UG, transforming the market for mobile user generated video content. 

Community engagements

Open sources


Good software is always used but never finished.

The goal is to always build the next v01. In software and in life. Zen philosophy puts it like: Nothing exists in its present form or color except in this moment. A beginners mind is free of any possessions, as it knows that all is in a state of fluid change.