About the Authors

Marcos Sarres stands as a pioneering figure in the realm of permissioned blockchain technology and smart contract development. With over 20 years of experience as CEO and CTO in innovation startups, he has led groundbreaking projects in the blockchain industry. As a leader of the Hyperledger Blockchain Brazilian community for two years, Marcos has played a crucial role in fostering the adoption and development of blockchain solutions in Brazil. He has also contributed to academia by teaching blockchain classes for developers in Brazilian universities. Recognized for his expertise, Marcos was nominated among the top three blockchain professionals in Brazil in 2020 (Prêmio Digitalks). His influence extends globally as a well-known speaker and panelist at blockchain and tokenization events worldwide. Passionate about blockchain technology, he actively participates in the Brazilian technical group of the ISO/TC 307 discussions on blockchain and distributed ledger technologies, shaping the future of decentralized systems.

Samuel Venzi is a CTO and blockchain developer with extensive experience in enterprise blockchain solutions, including Hyperledger Fabric and Besu. Samuel is proficient in many programming languages and frameworks as well as planning, designing and implementing blockchain solutions for complex business requirements. Samuel is certified by the Linux Foundation as Certified Hyperledger Fabric Administrator (CHFA), Hyperledger Fabric Certified Practitioner (HFCP) and Besu Certified Professional (BCP), the last two accomplished by integrating the Exam Developer team responsible for creating the certifications, reinforcing his role as a Subject-Matter Expert in the field. He has delivered over 20 blockchain projects to public and private companies. He contributes to the Hyperledger Fabric Admin SDK codebase and, most notably, is a core maintainer of the Hyperledger Labs CC-Tools project. Samuel also is a mentor in the mentorship project Hyperledger Fabric CC-Tools Support for Fabric Private Chaincode funded and promoted by the Linux Foundation. Finally, Samuel has been a speaker in multiple blockchain events including Blockchain Rio and the Hyperledger Member Summit in San Francisco and Tokyo.