Fundraising Fox
Jan Riethmayer
InvestorVP of Engineering at Earlybird Venture Capital · VP Engineering at Earlybird DWES Management GmbH & Co. KG
Berlin
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About
Jan Riethmayer is VP of Engineering at Earlybird Venture Capital, where he leads product and engineering with a three-person team and an agent-based workflow. Previously, he was a three-time VC-backed founder and CTO, including at Zencargo, which he helped grow from inception to Series B while leading engineering, product, and design teams of over 60 people, as well as bonusbox, which reached 4 million users in Brazil and Germany, and Kaizera. He also ran a development agency that completed 12 projects in a year for clients including Carhartt WIP, Red Bull, and Otto Bock, and twice prepared engineering data rooms for Series B rounds.
Experience
- Earlybird Venture CapitalVP of Engineeringcurrent2025 — presentBerlin, Germany
- Radical CTOExecutive CTO Coach | Interim CTO | Fractional CTO2021 — 2025Greater London, England, United Kingdom
- Radical CTOSenior Full Stack Engineer: CHAPTR: AI in publishing2024London Area, United Kingdom
- Radical CTOEngineering Leadership Coach - AWELL: Make care flows work harder than care teams with Awell2023 — 2024London Area, United Kingdom
- Radical CTOEntrepreneur in Residence - Signal Ocean2023London Area, United Kingdom
- Radical CTOFractional CTO - Passion.io - Mobile apps as a service for influencers2022London Area, United Kingdom
- Radical CTOData Engineer - Sillwood Technologies; Speech Processing Consultancy. Voice to Voice2022London Area, United Kingdom
- Radical CTOFractional CTO - Port Connect2021London Area, United Kingdom
- AutomataDirector of Software Engineering2022 — 2023Greater London, England, United Kingdom
- KaizeraCo-Founder and CPO2021 — 2022Greater London, England, United Kingdom
- ZencargoCTO and co-founder2017 — 2021London Area, United Kingdom
- Solar Options for Schools LtdCTO2016Distributed
- bonusbox GmbHCTO2011 — 2016Berlin
- urbanvention UGCTO2010 — 2011Berlin
- DAI-LaborJava Developer and Data Scientist2010Technische Universität Berlin
- Fyber (Sponsorpay)Lead Backend Developer (Ruby on Rails)2009 — 2010Berlin
- MediapeersBackend Developer (Ruby on Rails)2008 — 2009
Skills & more
+12 more
Artificial Intelligence (AI)TypeScriptTalent StrategyM&A Due DiligenceExecutive CoachingDue DiligenceProduct StrategyProduct DiscoveryAgentic AI DevelopmentAI DesignRecurrent Neural Networks (RNN)AutoencodersLanguages Deutsch · Englisch
- Designing and Building AI Products and Services — Emeritus
- Neural Networks and Deep Learning — DeepLearning.AI
From Jan's professional profile.
Colleagues at Earlybird Venture Capital
Frequently asked questions
- Who is Jan Riethmayer?
- Jan Riethmayer is VP of Engineering at Earlybird Venture Capital, where he leads product and engineering with a three-person team and an agent-based workflow. Previously, he was a three-time VC-backed founder and CTO, including at Zencargo, which he helped grow from inception to Series B while leading engineering, product, and design teams of over 60 people, as well as bonusbox, which reached 4 million users in Brazil and Germany, and Kaizera. He also ran a development agency that completed 12 projects in a year for clients including Carhartt WIP, Red Bull, and Otto Bock, and twice prepared engineering data rooms for Series B rounds.
- Where does Jan Riethmayer work?
- Jan Riethmayer is VP of Engineering at Earlybird Venture Capital.
- Where did Jan Riethmayer go to school?
- Jan Riethmayer studied at MIT xPRO (Designing and building AI Products and Services, Artificial Intelligence); Technische Universität Berlin.
Founder mafias
Technische Universität Berlin mafia71
Also came through, then founded or led a company.
MIT xPRO mafia19
Also came through, then founded or led a company.
Earlybird Venture Capital mafia9
Also came through, then founded or led a company.
Same school
Also attended MIT xPRO29
+ 23 more
Also attended Technische Universität Berlin127
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Shared employers
Also worked at Zencargo7
+ 1 more
