Open to opportunities

Washington Antonio

@washingtonantonio

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Full Stack Developer delivering end-to-end web features with React and Node.

Brazil

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What I'm looking for

I’m looking to build end-to-end web products and ship MVPs fast, while improving developer experience, code quality (Clean Code/SOLID), and measurable quality via unit/E2E testing in an Agile team.

I’m a Full Stack Developer with 3+ years of experience delivering web features end-to-end. I bring a strong foundation in JavaScript/TypeScript, React/Next.js, and Node.js backends (Express.js, Fastify, NestJS), with disciplined engineering practices like Clean Code, SOLID, and unit/E2E testing.

At Venturus, I built and maintained internal and developer-facing platforms using responsive, accessible UI (React/Next.js, Chakra UI) and typed data flows (TypeScript, Zod), improving maintainability and test coverage. As a freelancer, I develop custom MVPs and AI-powered applications—like an AI Essay Correction platform using OCR and Gemini API to deliver real-time feedback, used by students and reducing correction time by 70%.

Experience

Work history, roles, and key accomplishments

Current

Freelance Full-Stack Dev

Current

Freelance

Jan 2024 - Present (2 years 3 months)

Delivered custom end-to-end web solutions, including AI-powered products and high-conversion landing pages. Co-developed an AI essay correction platform using OCR and the Gemini API, reducing correction time by 70% for 20 students.

TypeScript MongoDB Gemini API Docker RESTful APIs MVP Development

Full Stack Developer

Venturus

Jan 2022 - Jan 2024 (2 years)

Built and maintained internal and public web applications for Gertec and Jabil, developing responsive React/Next.js UIs and Node.js backends. Improved maintainability with component reuse and documented flows, added unit testing (Jest) and maintained 70% test coverage with Vitest.

React Next.js TypeScript REST APIs CI CD

Education

Degrees, certifications, and relevant coursework

Universidade Federal do Amazonas

Bachelor of Science, Computer Science

2022 - 2026

B.Sc. in Computer Science covering algorithms, programming (including Python, Java, C/C++, JavaScript, Haskell, and ASM), AI, image processing, databases, and web development.

Fundação Matias Machline

Technical Diploma, Information Technology

2018 - 2020

Technical diploma in Information Technology focused on programming (C, Python, Java, JavaScript), computer architecture, networks, teamwork, and software engineering.