Daniel Martins +55 31 99314-0951 martinsda@gmail.com linkedin.com/in/daniel-aa-martins github.com/martins87 Summary Senior Full-stack Engineer with 7+ years of experience building interactive, user-focused applications, with a strong emphasis on system design. Work Experience Full-stack developer, PPQ.AI, June 2025 - present • Delivered end-to-end product features for an AI-powered SaaS platform, improving feature delivery speed through React, Next.js, TypeScript, and Node.js development. • Improved application responsiveness by reducing page rendering time by approximately 35% through frontend optimization and efficient API integration strategies. Full-stack developer, Cinesercla, August 2024 - April 2025 • Redesigned the online ticket purchasing experience website, increasing conversion rates through responsive UI improvements using Next.js, React, TypeScript and TailwindCSS. Reduced page load times by over 40% through frontend performance optimization, modern rendering techniques, and efficient state management with Zustand. Full-stack developer, Commonwealth Labs, December 2022 - June 2024 • Contributed to the development of a Web3 community platform with token-based governance and real-time feedback for users, building full-stack features with Solidity smart contracts and a frontend in Next.js, React, TypeScript, Tailwind CSS and GraphQL. Full-stack developer, Advanced Blockchain, February 2021 - October 2022 • Delivered frontend applications for four production financial platforms, improving transaction workflows and user experience using React, Next.js and TypeScript. Full-stack developer, CIASC, September 2019 - January 2022 • Developed web applications serving more than 17,000 concurrent users, improving platform reliability and op- erational efficiency using Angular, Node.js and Java Spring Boot. • Developed and contributed to the National Identification System, which unified identification numbers across states in Brazil, reducing risk of fraud. It allows citizens to use a single ID number and access a digital version of their ID through a mobile app. Full-stack developer, ELAD, March 2019 - August 2019 • Individually developed and maintained a demo platform that facilitated the listing of real estate properties and enabled users to buy and sell fractional ownership tokens on the blockchain. • Developed using Ethereum stack (Solidity, Smart Contracts, ethersjs, Truffle, MetaMask, Remix), MongoDB, Express.js, and Node.js. Blockchain developer, GOBLOCKCHAIN, February 2017 - May 2019 • Developed blockchain governance platforms while collaborating directly with founders to define technical archi- tecture and product direction. • Built backend services and frontend interfaces using Go, JavaScript and Ethereum technologies, delivering production-ready software in a startup environment. 1 Java developer, Federal University of Minas Gerais, January 2011 - February 2016 • Developed and maintained the academic graduation system for university teachers and students, improving efficiency and user accessibility using JEE Platform, EJB3, JSE, Hibernate and Jasper Reports. Skills • Frontend: React, Next.js, Angular, TypeScript, TailwindCSS • Backend: Node.js, Go, Java Spring Boot, Docker • Blockchain: Solidity, Foundry, Ponder, ethers, web3.js, Wagmi, viem, RainbowKit, Bitcoin libraries • Cloud: AWS: EC2, ECS, S3, DynamoDB, SQS • Databases: PostgreSQL, MySQL, MongoDB Personal Projects Operation Blockchain • Platform with on-chain notarization system, proof of funds verification using Bitcoin signatures, multi-signature functionality, and more. Bitcoin Free Market • Currently developing a marketplace where users can list goods and services, ask a price in bitcoin and negotiate freely among other users. Technical Articles • Technical articles about Software Development and other topics Education BSc in Computer Science — 2011 Federal University of Minas Gerais — Ranked among the best Computer Science schools in the country. Certifications • Go: The Complete Developer’s Guide — 2026 • Next.js: The Complete Guide — 2024 • Understanding TypeScript — 2022 • React: The Complete Guide — 2021 • Angular: The Complete Guide — 2020 • Blockchain Hyperledger Developer — 2018 • Ethereum Blockchain Developer — 2018 2