André Luiz Vieira

Summary

Frontend and Mobile Engineer with 5+ years building React and React Native products for fintech, core banking and e-commerce. Led the development of a React Native e-commerce app with 500,000+ downloads on Google Play and built web features for banking platforms used by 50,000+ customers. Strong in TypeScript, Next.js, component architecture, web performance and accessibility, with full-stack side projects running in production (Node.js, PostgreSQL, CI/CD). English: C1.

Experience

DB1 Global Software, Curitiba, Brazil (remote)

React and Mobile Developer, Nov 2023 – Present

• Led the development of a React Native e-commerce app with 500,000+ downloads on Google Play, acting as technical lead while the squad was being formed: defined architecture, code standards and the release flow, with a focus on performance and accessibility.
• Built and maintained web features with React, Next.js and TypeScript for the core banking platforms of a bank and two credit unions, used by 50,000+ customers.
• Mapped delivery bottlenecks in a client project and presented a financial analysis showing USD 10,000+ in potential savings from engineering and agile process changes.
• Reviewed pull requests and introduced code standards and Clean Code practices adopted by the team.
• Tracked delivery metrics (lead time, cycle time, deployment frequency) and negotiated scope and trade-offs with product, UX and stakeholders.
• Stack: React, React Native, TypeScript, Next.js, Vite, Jest, Vitest, Storybook, i18n, Java (native Android modules).

Junior React Developer, Dec 2021 – Nov 2023

• Developed web and mobile features for core banking and financial products with React, React Native, Angular and TypeScript.
• Wrote frontend lessons (CSS, responsive design, internationalization) for an internal program that trains people entering software development, and gave a lightning talk on browser integration in React Native.
• Organized company food and clothing drives that supported 300+ people.

Freelance Web Developer, Remote

Jul 2020 – Present

• Design, build and launch websites and web apps for small businesses end to end: requirements, Figma prototypes, development, testing and deployment on Vercel.
• USS Informática (IT services company): institutional website and service catalog with Next.js, React, TypeScript and Tailwind CSS.

Mannesoft, Curitiba, Brazil

Software Engineer Intern, Aug 2021 – Oct 2021

• Built small internal projects with PHP, Oracle SQL and JavaScript while onboarding to the company's management and education products.

Kenzie Academy Brasil, Curitiba, Brazil

Peer Coach, Jan 2021 – Jul 2021

• Mentored 200+ bootcamp students per month in HTML, CSS, JavaScript, React, Redux and Git through code reviews and debugging sessions.

Projects

• andreluizv.dev.br: personal site and tech blog in English, Portuguese and Spanish. Next.js 15 and React 19 front end backed by a Fastify content API (Drizzle, PostgreSQL on Neon, Vercel Blob) in a Yarn monorepo with a shared Zod contract, a private admin panel with OAuth sign-in, on-demand revalidation, CI and automated releases.
• Ritmoso: habits, tasks and goals app in 3 languages. Next.js, TypeScript, Prisma and PostgreSQL, with authentication, onboarding, Jest and Testing Library tests and a Playwright end-to-end suite.
• My Free Flashcards: spaced-repetition PWA with Google sign-in, real-time sync between devices and offline mode. React, TypeScript, Vite, Vitest and Firebase.

Skills

• Frontend: React, Next.js, TypeScript, JavaScript, HTML, CSS, Tailwind CSS, Styled Components, Redux, Storybook
• Mobile: React Native, native Android modules (Java), Progressive Web Apps
• Quality: Jest, Vitest, Testing Library, Playwright, code review, accessibility (WCAG), web performance
• Back end and data: Node.js, Fastify, REST APIs, PostgreSQL, Prisma, Drizzle, Firebase
• Tools and practices: Git, GitHub Actions, Vercel, Figma, Scrum, Kanban, internationalization (i18n)

Education

Technologist Degree in Systems Analysis and Development (Tecnólogo, undergraduate), Pontifical Catholic University of Paraná (PUCPR), Brazil, 2025

Full Stack Web Development Bootcamp, Kenzie Academy Brasil, 2021

React Native Ignite Program, Rocketseat

Writing and Community

• Author of a tech blog in three languages with 3,000+ readers, covering React, Next.js, system design, accessibility and performance.
• Created learning content for an internal program that trains new developers.

Languages

• Portuguese: native
• English: C1 (advanced)
• Spanish: basic