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Fractional CTO | I help Startup Founders turn business ideas into scalable products
Hi, I’m Sergio. I work as a Fractional CTO with tech startups, typically at the stage where there’s a strong idea but the product and system aren’t fully defined yet. Most Founders I work with are non-technical and in the early days of building their business. They are seeing a business opportunity, they know what they want to build, but not exactly how it should work under the hood, what to prioritise, or how to avoid wasting money, time and opportunity with wrong technical decisions. That’s where I come in. I help Startup Founders: - Turn ideas into clearly defined products (workflows, systems, trade-offs) - Build early versions that are actually usable for users and investors - Define the technical roadmap before hiring a team - Then scale into a proper engineering organisation as the business grows I’ve been a Startup CTO since 2014, including twice as a co-Founder. I know startups inside out and in recent years I have worked with 20+ startups as a Fractional CTO across fintech, healthcare, marketplaces, and B2B SaaS. Some examples of work I’ve led: - Built and scaled lending and payments product in Europe and the US - Designed KYC/AML and financial data flows in regulated environments across the globe - Built a HIPAA compliant tele-health platform end to end in the US market - Helped founders go from idea → product → team → scale I’m a hands-on builder when needed, and my main focus is getting the product and system right from the beginning, so everything that follows is faster and more efficient. I also work with more established Scaleups and larger companies launching new ventures, in things such as: - Technical leadership and team structure - Scaling systems and engineering orgs - Supporting fundraising and due diligence If you’re a Startup Founder or Business Owner and you’re: - figuring out what to build and how, or - about to
Universidade Nova de Lisboa
M.Sc., Computer Science
N/A – Present
University of Cambridge
Advanced Certificate, Global Business
N/A – Present
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Cultural Fit Analysis
The candidate's extensive experience with startups and venture studios, particularly in fractional CTO roles, indicates adaptability and a strong entrepreneurial spirit. Their involvement in diverse industries (Fintech, E-commerce, AI, Blockchain, Health) suggests a broad interest and ability to integrate into various organizational cultures. However, the target role is 'Blockchain Developer', while most recent roles are high-level leadership (CTO/Fractional CTO). While there is blockchain experience, it is not recent and primarily at a strategic/architectural level rather than hands-on development, which might indicate a mismatch for a pure developer role.
Soft Skills & Operational Fit
The candidate demonstrates strong leadership, strategic planning, and team management skills, evidenced by numerous CTO and Fractional CTO roles. Experience in setting engineering culture, managing remote teams, and liaising with stakeholders suggests excellent operational fit. Public speaking and technical writing roles highlight strong communication and mentoring capabilities.