Martin Rothenberger

Tech Expert & Advisor | Fractional & Interim CTO | Tech Strategy & PE/VC Due Diligence

Berlin, Berlin, Germany

About

Agile Coach, consultant, technical manager, Senior Software and System Engineer with more than 20 years professional experience - especially in start-ups , e-commerce, fast growing and large scale environments. Available for challenging projects, preferably as Agile Coach or interim technical manager / CTO for agile transitions and change management, taking advantage of in-depth knowledge and experiences in development processes, release management, designing large scale web applications and environments, as well as building and coaching successful and motivated teams. Martin Rothenberger analyzes and optimizes existing IT structures, processes and teams for several start-ups and enterprises with passion; always keep a high quality upright while never loose the focus for time-to-market and costs.

Experience

  • Fractional & Interim CTO | Consulting, Coaching & Advisory at Martin Rothenberger
    Jan 2014 - Present · 12 yrs 7 mos

    Independent Interim / Fractional CTO and Tech Advisor. I help growth companies and investors de-risk and accelerate Product & Engineering: tech strategy, architecture simplification, modernizing platform/ERP & eCommerce stacks, and building strong engineering orgs (teams, leadership, delivery processes). I run structured Tech Due Diligence & Health Checks and coach founders, CTOs and product leaders—hands-on, pragmatic, outcome-driven.

  • Technical Expert at Philipps & Byrne GmbH
    Feb 2021 - Present · 5 yrs 6 mos

    Performing Tech Due Diligences and Health Checks for top VC's, PE's and startups for Series A, B and C and M&A transactions.

  • Interim CTO at Rebike Mobility GmbH
    Oct 2024 - Feb 2025 · 5 mos

  • Co-Founder & CTO at eifas GmbH
    Oct 2016 - Jan 2024 · 7 yrs 4 mos

    FinTech/SaaS provider specializing in financial and administrative solutions for B2B clients. - Built the Tech Foundation; Designed and implemented the core SaaS platform for financial and administrative services. - Ensured Compliance & Security; Developed a secure, scalable architecture, meeting strict financial regulations. - Drove Business Growth; Enabled scalable operations through early ML/AI automation and optimized tech infrastructure.

  • Interim CTO at VISI/ONE
    Jul 2021 - May 2023 · 1 yr 11 mos