Open to opportunities

Daniel Martins

@danielmartins1

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Senior full-stack engineer building scalable, user-focused web experiences.

Brazil

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What I'm looking for

I’m looking for a senior full-stack role where I can design systems end-to-end, build high-performance user experiences, and ship meaningful features—especially in modern web and Web3/AI products.

I’m a Senior Full-stack Engineer with 7+ years of experience building interactive, user-focused applications, with a strong emphasis on system design. I’ve delivered production features across AI-driven platforms, modern ticketing experiences, and Web3 community products—always focused on scalability, usability, and rendering/performance improvements.

In Web3 and blockchain work, I’ve built full-stack features that include Solidity smart contracts, token-based governance, and real-time user feedback, plus trading interfaces across multiple live DeFi protocols. I also developed public-facing systems for Brazil’s Public Security Department and worked on the National Identification System that unified identification numbers across states, using technologies spanning Angular, Node.js, Java Spring Boot, and more.

Experience

Work history, roles, and key accomplishments

Current

Full-stack developer

Current

PPQ.AI

Jun 2025 - Present (1 year 1 month)

Building new features for an AI-driven platform using Next.js, React, TypeScript, and Node.js. Designing and integrating APIs, optimizing rendering performance, and ensuring scalability and usability across the product.

Next.js React TypeScript Node API Integration Scalability Usability

Full-stack developer

Cinesercla

Aug 2024 - Apr 2025 (8 months)

Led development of the website and enhanced the movie ticket purchasing experience by improving page speed and implementing a modern, responsive UI. Built using Next.js, React, TypeScript, Tailwind CSS, Zustand, and shadcn.

Next.js React TypeScript Tailwind Zustand Shadcn Responsive UI

Full-stack developer

Commonwealth Labs

Dec 2022 - Jun 2024 (1 year 6 months)

Contributed to a Web3 community platform with token-based governance and real-time feedback for users. Built full-stack features using Solidity smart contracts and a frontend in Next.js, React, TypeScript, Tailwind CSS, and GraphQL.

Web3 Real Time Feedback Solidity Smart Contracts Next.js React TypeScript Tailwind GraphQL

Full-stack developer

Advanced Blockchain

Feb 2021 - Oct 2022 (1 year 8 months)

Built trading interfaces for four live DeFi protocols, including quoting, routing visualization, and execution state management. Designed a reusable component system shared across all four protocol codebases using Next.js, React, TypeScript, and MaterialUI.

DeFi Quoting Next.js React TypeScript Material UI

Full-stack developer

CIASC

Sep 2019 - Jan 2022 (2 years 4 months)

Developed software solutions for the Public Security Department of the State of Santa Catarina, including the Police Forces main system with concurrent 17,000 users. Worked on the National Identification System unifying identification numbers across states and enabling citizens to access a digital ID via a mobile app.

Angular National ID Systems Mobile Digital ID Spring Boot

Full-stack developer

ELAD

Mar 2019 - Aug 2019 (5 months)

Individually developed and maintained a demo platform for listing real estate properties and enabling users to buy and sell fractional ownership tokens on the blockchain. Built with the Ethereum stack (Solidity, smart contracts, ethersjs, Truffle, MetaMask, Remix), plus MongoDB, Express.js, and Node.js.

Solidity Smart Contracts EthersJS Truffle MetaMask Remix MongoDB Node

Blockchain developer

GOBLOCKCHAIN

Apr 2017 - Aug 2019 (2 years 4 months)

Built governance systems for the startup using the Ethereum stack (Solidity smart contracts, Remix, Web3.js, Geth, MetaMask, Truffle) and Go. Focused on implementing blockchain governance-related functionality.

Governance Solidity Smart Contracts Remix Web3.js GETH MetaMask Truffle Go

Java developer

Federal University of Minas Gerais

Aug 2011 - Jun 2015 (3 years 10 months)

Developed and maintained the academic graduation system for university teachers and students. Improved efficiency and user accessibility using JEE Platform, EJB3, JSE, Hibernate, and Jasper Reports.

Java EJB 3 Hibernate Jasper Reports