Nicholas Z.

Nicholas Z. Jonajo Consulting- I am a Blockchain Architect and Developer with over 7+ years of experience designing and implementing enterprise-grade distributed solutions. I am specialized in Central Bank Digital Currencies (CBDC), privacy-preserving protocols, and scalable financial systems. I have deep expertise in both public and private blockchain implementations, including Ethereum and Hyperledger Fabric. I offer my services remotely. PROFESSIONAL EXPERIENCE Parfin Blockchain Solutions Architect, Developer and Researcher, Feb 2022-Feb 2025 Technologies: Golang, Linux, JavaScript, Shellscript, and Solidity Activities and responsibilities: ●​ Research, architecture and Protocol design for distributed networks and financial blockchain solutions ●​ Privacy-preserving protocols, including KYC attestation systems, and Scalability optimization for enterprise blockchain networks ●​ GDPR compliance implementation for sensitive data handling ●​ Zero-knowledge proof integration for confidential transactions ●​ Develop PoC implementations using Golang, Linux, JavaScript, Shellscript, and Solidity ●​ Implement advanced cryptography solutions including ZK proofs using Zokrates, Merkle trees, and verification systems ●​ Evaluate and validate emerging technologies such as ZkEVM for enterprise applications ●​ Solidity Smart Contract Auditing tool ●​ A tool that analyzes solidity smart contracts using multiple tools like Mythril, Slither, and Ethlint. Integrated with AI that also analyzes for vulnerabilities and provides a suggested, and improved contract. Generates a PDF report Mesou Developer, Owner, and Production Deploy, Jan 2019-Present Project to explore Fabric potential in the Food Industry Technologies: Hyperledger Fabric, Docker, NodeJS, Flutter, Dart, and Gcloud Activities and responsibilities: ●​ Decentralized ERP Application for bars and restaurants in Blockchain using Hyperledger Fabric, Docker, NodeJS, Flutter, Dart, and Gcloud to connect the food chain participants that include but are not limited to suppliers, food businesses, restaurants, bars, customers, and payment systems Jonajo Consulting- Blockforce Blockchain Developer, May 2020- Feb 2022 Technologies: TypeScript, Blockchain, Hyperledger Fabric network Activities and responsibilities: ●​ Architected and Developed a clothing distribution Hyperledger Fabric network for C&A, Automated Fabric component management ●​ Add and remove peers, orders. ●​ Create channels. Add organizations. ●​ Register organizations ●​ Wrote chaincodes in Typescript for distribution and negotiation of clothing ●​ Different actors could do different operations, the CA register of users and roles CPQD Blockchain Architect, Apr 2019-May 2020 Technologies: Hyperledger Fabric Blockchain Network Activities and responsibilities: ●​ Architected and developed N2med medication exchange platform ○​ ○​ ○​ ●​ Implemented Hyperledger Fabric framework Deployed production environment with TLS security Integrated Raft consensus protocol for reliable transaction ordering Led Safetrace.com agricultural traceability solution ○​ Developed modular smart contracts for multi-asset tracking, specialized implementation for the coffee industry supply chain ○​ Managed 4-person team (2 developers, 1 QA, 1 CI/CD specialist) ○​ Created flexible asset tracking system adaptable to various agricultural products Blockforce Blockchain Developer, Jan 2017-Mar 2019 Technologies: Jira, API, Hyperledger Fabric Activities and responsibilities: ●​ Android Development Intern ○​ Develop, test, deploy, and bug fix Android applications at Monitora Tec. Responsibilities include fixing bugs following a process using Jira, programming new features, including API access, information retrieval, information handling using JSON and XML, and design implementation for new screens. ●​ Led blockchain solution for VistaJet Trainee ○​ Design a blockchain solution for private jet rentals for VistaJet using Hyperledger Fabric. ○​ ○​ Created an experimental network for the different actors (catering, user rental, jet owners, hangars) Jonajo Consulting- Education Bachelor of Systems of Information- Majors: Software Development and Information Flow Unicamp, Campinas, Brazil Research Paper - Clearance Comparison between Cryptocurrencies and Credit Cards 2015 Assistant Professor - Johan Hendrick Poker Unicamp, Campinas, Brazil Contributor Research Paper - Blockchain-Based Lean Supply Chain: A Simulation Approach 2024 Lead - Daniel Morelli, Lead Professor - Paulo Sérgio, Tech Lead - Nicholas Zanutim Unicamp, Campinas, Brasil Advanced Smart Contract Security Course 2024 Taught by Arbitrary.Execution and Chainshot Analysis of smart contract vulnerabilities, attack vectors, mitigation, and tools Jonajo Consulting-