André Defrémont

Software Engineer
Belém, PA, Brazil  ·  EU Citizen  ·  Available for Remote Work Worldwide
adcoderio@gmail.com
+55 91 98134-8438
Professional Summary

Software Engineer with 10+ years of experience building full-stack web applications using React.js, Vue.js, Node.js, MERN stack, AWS, and Kubernetes. Background in blockchain (Ethereum, Hyperledger Fabric) and distributed systems. Experienced with Agile methodologies, CI/CD pipelines, and leading teams through complete software development lifecycles.

Core Competencies
Languages TypeScript, JavaScript, Python, Go, Solidity, Java, C#, PHP, Kotlin
Frontend React.js, Vue.js, Next.js, Nest.js, Angular, Ionic
Backend Node.js, Express.js, FastAPI, Java Spring Boot
Cloud & DevOps AWS, Kubernetes, Docker, Helm, CI/CD, GitLab CI
Databases MongoDB, PostgreSQL, CouchDB
Blockchain Hyperledger Fabric, Ethereum, Smart Contracts, Besu, Bevel
Methodologies Agile, Scrum, Kanban, TDD, SOLID, Clean Architecture
APIs OpenAI, Anthropic Claude, Google Gemini, REST, GraphQL
Professional Experience
Chief Information Officer & Full-Stack Engineer Mar 2020 — Present
Amachains · Belém, PA, Brazil
  • Architected and built production-ready PWAs from scratch using Vue.js, React.js, and the MERN stack, delivering seamless user experiences and reliable performance.
  • Developed smart contracts on Ethereum and Hyperledger Fabric for carbon credit management and sustainability projects.
  • Led the development of a Web3 platform enabling transparent carbon credit lifecycle management — from emissions tracking to carbon offsetting through verifiable digital records.
  • Managed cloud infrastructure deployments on AWS and Kubernetes, integrating web and blockchain technologies.
Stack: Node.js, React.js, Vue.js, MongoDB, Hyperledger, Ethereum, Solidity, AWS, Kubernetes, Go, Python, Docker
Blockchain Software Engineer Apr 2024 — Feb 2026
RNP — National Research and Education Network · Brasília, DF, Brazil
  • Build and maintain Hyperledger-based blockchain networks supporting national-scale research, education, and Web3 innovation across Brazil.
  • Design scalable and secure distributed ledger solutions using Fabric, Besu, Bevel, and Ethereum, deployed on Kubernetes with Helm charts.
  • Provide robust blockchain infrastructure for academic and research institutions nationwide.
Stack: Hyperledger Fabric, Besu, Bevel, Ethereum, Solidity, Go, Kubernetes, Helm, Web3
Full-Stack Software Engineer Jul 2019 — Mar 2020
Equilibrium Web · Belém, PA, Brazil
  • Developed scalable, user-centric digital solutions tailored to diverse business requirements.
  • Enhanced AngularJS applications and optimized a Java legacy system, improving reliability and performance.
Stack: Node.js, AngularJS, Java
Full-Stack Software Engineer Apr 2018 — Jul 2019
XIFIX Tecnologia · Belém, PA, Brazil
  • Enhanced and maintained React.js and Node.js web applications powering content management and marketing platforms.
  • Maintained C# systems and PHP websites, ensuring robustness aligned with evolving business needs.
Stack: React.js, Node.js, C#, PHP
Web Software Engineer Jan 2017 — Jan 2018
Universidade Federal do Pará (UFPA) · Belém, PA, Brazil
  • Developed and maintained Joomla-based websites supporting academic programs and community engagement.
Stack: CSS, HTML, JavaScript, Joomla, PostgreSQL
Software Engineer Jun 2012 — Jul 2016
XIFIX Tecnologia · Belém, PA, Brazil
  • Comprehensive technical support with progressive transition to active software development in React.js, Node.js, C#, and PHP.
  • Contributed to application improvements and feature development, building a strong foundation in full-stack engineering.
Stack: Node.js, React.js, C#, PHP
Education
M.Sc. in Computer Science 2021 — 2023
Universidade Federal do Pará (UFPA)
Computer Systems Networking & Telecommunications · Focus: Blockchain & Sustainability
B.Sc. in Information Systems 2013 — 2017
Universidade Federal do Pará (UFPA)
Computer Systems Networking & Telecommunications · Thesis on Blockchain Technology
Certifications
Hyperledger Fabric v2.x — The Complete Guide on Kubernetes
Node.js Developer — The Complete Course (3rd Edition)
Languages
Portuguese — Native
English — Professional Working Proficiency (B2+)
French — Elementary Proficiency
Spanish — Elementary Proficiency
Selected Projects
Carbon Credit Platform
Enterprise Web3 platform for carbon credit lifecycle management and ESG compliance
Vue.js, Hyperledger, Kubernetes, Node.js
DASP — Decentralized Scientific Publisher
Transparent blockchain-based academic publishing platform
TypeScript, Hyperledger Fabric, IPFS, Vue.js
Redes Locais Marketplace
Full-stack multi-vendor marketplace with local delivery and split payments
JavaScript, Node.js, MongoDB, Express.js
RadioGuess
Geography learning game with real-time radio streaming from 50+ countries
TypeScript, Next.js 15, React