Paulo Martins

CTO · Blockchain, Web3 & Fintech

Brazil

About

Tech entrepreneur with 18+ years of experience building high-impact digital products — from zero to scale. As CTO and Partner at Nexa Finance, I lead an engineering team delivering a live alternative investment platform with blockchain infrastructure and Real World Asset (RWA) tokenization. Previously, I spent 5+ years at Bitfy (BWS) as Head of Technology and CTO, where I architected from scratch a multipurpose cryptocurrency wallet — integrating exchanges, payment gateways, banking systems, KYC/compliance, and Bitcoin infrastructure, turning crypto into an everyday currency. My work goes beyond code: I build teams, define architectures, choose tech stacks, and align technology to business outcomes. Specializing in Blockchain, Web3, and Cloud (AWS), with a strong fullstack background (Node.js, TypeScript, React Native, PHP, Python, Go). I thrive at the intersection of technical innovation and real-world impact — whether building the next digital financial product or advising companies as a tech consultant.

Experience

  • Partner and CTO at Nexa Finance
    Nov 2024 - Present · 1 yr 9 mos

    Nexa is a fintech blending traditional financial market expertise with cutting-edge technology to build the next generation of capital markets products. – Leading an engineering team covering product, infrastructure, and data – Core product in production: alternative investment platform with blockchain infrastructure and RWA tokenization – Driving the company's AI strategy — implementing AI-powered workflows to boost team productivity and embedding AI capabilities directly into financial products – Defining technical strategy and product roadmap in close collaboration with business stakeholders – Stack: Node.js, TypeScript, AWS, Blockchain, Web3, Smart Contracts, AI/LLMs

  • Bitfy BWS (Full-time · 5 yrs 3 mos)
    • CTO
      May 2023 - Nov 2024 · 1 yr 7 mos

    • Head of Technology
      Sep 2019 - May 2023 · 3 yrs 9 mos

      Bitfy is a multipurpose crypto wallet enabling real-world use of cryptocurrency — bill payments, local currency withdrawals, gift cards, and more. – Architected and built the entire platform from scratch — backend, mobile (React Native), and infrastructure – Led integrations with exchanges, payment gateways, banking systems, and crypto brokers – Implemented KYC and compliance flows, ensuring full regulatory adherence – Scaled infrastructure to support user growth with focus on performance and resilience – Deep technical expertise in the Bitcoin network and protocols for real-world financial services – Stack: Node.js, TypeScript, React Native, AWS (Lambda, RDS, S3, SES, SQS, SNS, EC2, API Gateway), MongoDB, MySQL

  • Co-Founder & Software engineer at Weepa
    Jan 2014 - Jul 2019 · 5 yrs 7 mos

    Technology company focused on the Brazilian advertising market. – Co-founded and built the company from scratch as fullstack developer and tech lead – Developed web solutions, mobile apps (React Native), and IoT prototypes (Arduino) – Stack: PHP (Laravel/Lumen), Node.js, Python (Flask/Chalice), Go, MySQL, MongoDB, AWS

  • Senior Backend & Frontend Developer at Media Interactive
    Jul 2012 - Jan 2014 · 1 yr 7 mos

    – Architecture and development of new web solutions; maintenance of legacy systems – Stack: PHP, JavaScript, HTML5, CSS3, WordPress, Joomla, Drupal

  • Backend & Frontend programmer at DigitalBox
    Sep 2010 - Jun 2012 · 1 yr 10 mos

    – Development and maintenance of web solutions