Hi, I'mMatheus Araújo
Software Engineer — React, TypeScript, Next.js, Node, GraphQL.
4+ years building digital products. Collaboration → Precision → Scale.
About
Engineering that delivers results.
From intuitive interfaces to high-performance systems: collaboration, precision and scalability.
Software Engineer with 4+ years shipping digital products — from intuitive interfaces to high-performance systems. I turn business needs into robust, measurable and scalable solutions.
Focused on React, Next.js and TypeScript, with consistent practice in design systems, automated testing and REST/GraphQL APIs. Continuously learning: front-end architecture, web performance and clean code.
−45%
load time
Strategic refactor of legacy code.
−60%
production bugs
Design system + automated tests.
4+ years
continuous delivery
Product, performance and scalability.
Experience
Professional journey
Four teams, 4+ years focused on product, performance and quality.
Mid Frontend Engineer
@ TwilacurrentAug 2025 — Present · Joinville, SC, Brazil
- Product engineering with React, TypeScript and Next.js
- Focus on performance, scalability and delivery quality
Frontend Engineer
@ KividApr 2024 — May 2025 · Salvador, BA, Brazil
- B2B platform in React.js and Next.js
- Real-time card and PIX checkouts with WebSockets
- Design System integrated with Storybook, reused across multiple products
- Mobile with React Native and Vue + Ionic
- Code reviews and close collaboration with design
Frontend Engineer
@ Brainny Smart SolutionsOct 2022 — Apr 2024 · Pelotas, RS, Brazil
- Continuous evolution of the Efficlin product with React and Next.js
- Mobile apps with React Native, GraphQL and REST integrations
- Atomic Design + Chakra UI at scale
- Automated tests that reduced production bugs
Full Stack Developer
@ Grupo NobreAug 2021 — Nov 2021 · Fortaleza, CE, Brazil
- Full-stack solutions with PHP and Laravel
- Multidisciplinary teams and agile methodologies
- Process standardization and continuous system improvement
Stack
Day-to-day toolkit
Technologies I use to ship product with quality and speed.
Frontend
Scalable, performant and accessible interfaces.
- React
- Next.js
- TanStack
- TypeScript
- Tailwind
- Storybook
- Radix
- shadcn
- Chakra UI
- Material UI
- Ant Design
Mobile
Native and hybrid apps.
- React Native
- Ionic
- Vue
State & Forms
State management and robust forms.
- Zustand
- Redux
- React Query
- React Hook Form
- Zod
- Yup
Backend
APIs and services.
- Node.js
- Nest.js
- Prisma
- GraphQL
- REST
Testing
Quality from unit to e2e.
- Vitest
- Jest
- Testing Library
- Playwright
- Cypress
DevOps
Infra and continuous delivery.
- Docker
- GitFlow
- CI/CD
- PostgreSQL
- MySQL
Projects
What I'm building
A mix of open-source products, AI tools and experiments. Focus on DX, performance and product.
shrink
NewMobile and tablet simulator on any website.
Open-source browser extension to test layouts across viewports. No analytics, no paywalls — just resize and test.
- TypeScript
- Browser Extension
- Chrome
- Firefox
repo-lens
AIChat with any GitHub repository.
Ground Claude in your codebase: architecture, security audits and dependency reviews via natural conversation.
- TypeScript
- TanStack Start
- Better Auth
- PostgreSQL
- Playwright
- Docker
- Monorepo
impact-ledger
AIAI that turns LinkedIn + GitHub into a bio with real impact.
Tool that pulls your LinkedIn and GitHub data and generates bio + README highlighting niches, value delivered and impact per company.
- TypeScript
- AI
- GitHub API
mono-repo-auth
Open sourceFull-stack starter with Better Auth and shared design system.
Full-stack monorepo: Better Auth, design system with Radix + shadcn, NestJS API and TanStack Start apps.
- TypeScript
- NestJS
- TanStack Start
- Better Auth
- Radix
- shadcn
Contact
Let's talk?
Open to opportunities, collaborations and conversations about product engineering.