Paulo Vidal

Senior Blockchain Engineer | Solidity & Go

Salary / Daily rate

Lisbon, Portugal

Freelance, open to permanent contract

Skills

SolidityTypescriptBlockchain

Languages

EnglishFrenchPortugueseSpanish

About me

Intro

Blockchain Engineer with 3+ years specializing in enterprise DeFi protocols and distributed ledger solutions. Built tokenization platforms, EVM APIs, and Hyperledger Fabric networks for major clients including NextGenerationEU projects. Expert in Solidity, Go, TypeScript with proven ability to architect end-to-end blockchain solutions that drive business transformation.

Links

Work experience

Blockchain Engineer

Celfocus

Apr 2024 - Present

2 years 7 months

Lisbon, Portugal

As a Blockchain Developer at Celfocus, I am an integral part of the blockchain team, contributing to multiple pioneering projects that leverage cutting-edge technology to deliver transformative solutions. # Decentralized Loyalty Points System I am part of a NextGenerationEU-funded project focused on building a decentralized loyalty points solution using Hyperledger Fabric. My responsibilities span several key areas: Developing chaincodes in Go (Golang) to enable secure and transparent transactions. Creating and maintaining a Java-language library that exposes the Hyperledger Fabric Gateway client API for seamless back-end interaction with the blockchain. Building an end-to-end Kotlin application to support integration and functionality. Overseeing the deployment of a Hyperledger Bevel-powered network, utilizing tools such as Ansible, Kubernetes for container orchestration, and Flux for GitOps workflows. # Blockchain Enterprise Asset Project In addition to my work on the loyalty points system, I am developing a comprehensive suite of reusable libraries, APIs, configuration files, and deployment strategies using Node.js, TypeScript, and Vercel Turborepo. These components are designed to integrate EVM-based chains and Hyperledger Fabric, equipping Celfocus with robust tools for building end-to-end blockchain solutions. Across both projects, I collaborate closely with team members and stakeholders to design and implement scalable blockchain solutions that align with both technical and business objectives. My contributions include technical strategy, in-depth discussions, and ensuring seamless integration across all components. Quality assurance and security remain paramount in my work. I consistently perform rigorous testing, code reviews, and research emerging technologies to keep our solutions at the forefront of innovation.

Bitfy BWS

Apr 2023 - May 2024

1 year 2 months

Buenos Aires, Argentina

Blockchain Architect

Dec 2023 - May 2024

6 months

Buenos Aires, Argentina

Tokenization Solution and DeFi Protocol Architecture: Pioneered the development of a cutting-edge tokenization solution and DeFi protocol. Authored comprehensive Software Requirements Specifications (SRS), engaging directly with a major client to secure ongoing project development. CI/CD Pipeline Development for Smart Contracts: Lead the design and implementation of CI/CD pipelines, ensuring robust, secure smart contract deployment. Software Requirements Specification for API Enhancements and EVM API Overhaul: Craft detailed SRS documents for new API features and major improvements to the Ethereum Virtual Machine (EVM) API, aligning technology with business objectives. Blockchain Integration Workshops for Backend Developers: Conduct specialized workshops to equip backend developers with essential blockchain integration skills. Proof of Concept Development: Innovate and validate blockchain applications through the creation of Proof of Concepts, demonstrating practical applications of blockchain technology. Talent Acquisition and Interview Management for Development Team: Oversee the recruitment process and actively participate in conducting interviews for new developers. Craft comprehensive interview questions to ensure we build a high-caliber team aligned with our innovative blockchain vision. Unit Test Authoring: Develop comprehensive unit tests to guarantee the reliability and performance of our blockchain solutions. Code Review and Quality Assurance: Perform meticulous code reviews for merge requests to uphold high standards of code quality across our projects. Software Documentation and Standards Development: Responsible for crafting detailed software documentation, setting the benchmark for company-wide documentation standards. This role underscores my commitment to clarity, consistency, and excellence in communication.

Blockchain Developer (Mid Level)

Apr 2023 - Dec 2023

9 months

Buenos Aires, Argentina

During my tenure, I made significant contributions to three major projects. Firstly, as a blockchain integration engineer, I played a crucial role in developing a mobile application that facilitated cryptocurrency purchases, swaps, and payments at various establishments, including tax payments. I successfully integrated the Stellar blockchain into the app and incorporated ERC20 tokens on both the Ethereum and Binance Smart Chain platforms. Secondly, I took on the role of a blockchain engineer for a Blockchain as a Service initiative, for which I focused on developing blockchain integration APIs specifically tailored for the Polkadot and Polygon networks, using various technologies such as TypeScript, Node.js, Express.js, NestJS, ethers.js, and polkadot.js. Furthermore, I worked on an EVM integration API, offering comprehensive support for Ethereum, BSC, Polygon, Avalanche, ERC20, and ERC721 tokens, specializing in the development of Solidity smart contracts using Hardhat.

Blockchain Developer (Junior)

Bitfy

Jan 2022 - May 2023

1 year 5 months

Buenos Aires, Argentina

During my tenure, as a blockchain integration engineer, I played a crucial role in developing a mobile application that facilitated cryptocurrency purchases, swaps, and payments at various establishments, including tax payments. I successfully integrated the Stellar blockchain into the app and incorporated ERC20 tokens on both the Ethereum and Binance Smart Chain platforms.

Tribunal de Justiça de São Paulo

Apr 2019 - Jan 2022

2 years 10 months

São Paulo, State of São Paulo, Brazil

Judicial Law Clerk (Adjunct to Appellate Judge)

May 2019 - Jan 2022

2 years 9 months

São Paulo, State of São Paulo, Brazil

As a Legal Clerk and Assistant to an Appellate Judge, I actively contributed to the preparation of draft opinions on various civil matters, including family law, consumer law, and contracts. My responsibilities primarily involved the meticulous drafting and refinement of judicial decisions, ensuring clarity, coherence, and adherence to legal principles.

Law Clerk

Apr 2019 - May 2019

2 months

São Paulo, State of São Paulo, Brazil

Played a pivotal role in drafting judicial decisions under the guidance of an Administrative Law Judge, ensuring accuracy, compliance with legal standards, and clarity in communication. Developed proficiency in interpreting complex legal issues and translating them into comprehensive legal documents. Efficiently managed case files and documentation, ensuring timely and organized access to essential legal documents. Demonstrated meticulous attention to detail in reviewing case materials, aiding in the accurate and efficient administration of justice. Gained comprehensive knowledge in administrative law and judicial processes, enhancing my legal analytical skills and ability to work effectively in a high-pressure legal environment.


Education

PUC Minas

Solution Architecture

2024 - 2026

2 years 1 month

PUC Minas

Full Stack Web Development Specialization

2021 - 2023

2 years 1 month

Université Lumière Lyon 2

Licence

2014 - 2017

3 years 2 months

USP - Universidade de São Paulo

Bachelor of Laws - LLB

2012 - 2016

4 years 11 months

The best place to find your next move

© 2026. All Rights Reserved.