</>Caio Sousa

Hi, I'm

Caio Sousa

Senior Full Stack Developer

I build modern, scalable, high-performance web applications with React.js, Next.js, Node.js, and TypeScript.

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About me

Senior Full Stack Developer with over 5 years of experience specialized in building high-performance, scalable web applications and modern architectures. Strong expertise in the JavaScript/TypeScript ecosystem (React.js, Next.js, Node.js) and integration with robust Java ecosystems.

Proven track record in developing efficient REST APIs, microfrontend architecture, advanced componentization, and CI/CD pipeline implementation in cloud environments. Strategic work on highly complex digital products in insurance, technology, and healthcare segments.

5+

Years of experience

4

Companies in my history

3

Featured projects

Main stack

JavaScript
TypeScript
React
Next.js
HTML5
CSS3
Redux
React Native
Storybook
Node.js
Java
PostgreSQL
MongoDB
Fastify
Git

Skills

Frontend

  • React.js
  • Next.js
  • TypeScript
  • JavaScript
  • HTML5
  • CSS3
  • Tailwind CSS
  • Styled Components
  • Zustand
  • Redux
  • Effector
  • Storybook

Backend

  • Node.js
  • Fastify
  • NestJS
  • Express
  • Java
  • REST APIs
  • PostgreSQL
  • MySQL
  • MongoDB
  • Prisma ORM
  • Data Modeling

Tools

  • Git / GitHub
  • Docker
  • Jest
  • GCP
  • CI/CD
  • VS Code
  • ESLint
  • Prettier
  • Figma

Others

  • Microfrontends
  • Clean Code
  • Code Review
  • Teamwork
  • Agile methodologies
  • C#
  • Unity

Professional Experience

03/2025 - Present

R.evolution Club

Senior Full Stack Developer (Contractor)

Digital platform focused on the wellness, health, and quality of life ecosystem.

  • Technical leadership in developing, maintaining, and architecturally evolving scalable web applications using React.js, TypeScript, and Node.js with Fastify.
  • Database architecture and modeling using Prisma ORM and PostgreSQL, ensuring high query performance and data consistency.
  • Building efficient REST APIs and integrating third-party services for content management, events, and digital service workflows.
  • Developing pixel-perfect responsive interfaces with a focus on reuse through advanced componentization and strong UX practices.
  • Conducting rigorous code reviews, optimizing performance on critical routes, and preventive refactoring of legacy code.

Tech: React.js, TypeScript, Node.js, Fastify, Prisma ORM, PostgreSQL, REST APIs, Git

04/2025 - 05/2026

Deal

Senior Full Stack Developer (Full-time)

Global technology consultancy working on large-scale projects.

  • Development and governance of robust web applications focused on performance and Core Web Vitals with React.js, Next.js, and TypeScript.
  • Implementation of Microfrontends architecture to modularize product fronts, enabling independent and decoupled deployments.
  • Managing complex state in large-scale applications using Zustand and Redux.
  • Strategic involvement in the Java backend ecosystem, supporting legacy services and validating complex business rules.
  • Active collaboration in cross-functional squads (Product, Design, QA, and Backend) under agile methodologies to refine high-value deliveries.

Tech: React.js, Next.js, TypeScript, Java, Zustand, Redux, Microfrontends, REST APIs, HTML5, CSS3, Git

03/2022 - 02/2025

Azul Seguros

Same company · previously contracted via Pixter, then direct hire

Senior Frontend Developer

"Azul por Assinatura" product (Azul Seguros and Itaú partnership).

  • Frontend engineering focused on critical quote, purchase, and logged-in customer journeys using React.js and TypeScript.
  • Development of high-conversion landing pages with Next.js, applying advanced technical SEO, hybrid rendering, and responsiveness techniques.
  • Creation and preventive maintenance of the internal reusable component library documented via Storybook.
  • Development and integration of routes with Java on the backend, adjusting REST APIs for new checkout flows and insurance rules.
  • Maintenance of automated CI/CD pipelines in Google Cloud Platform (GCP), ensuring code quality with Jest tests.

Tech: Java, React.js, Next.js, TypeScript, Effector, Styled Components, Storybook, Jest, REST APIs, GCP, CI/CD, Git

Mid-level Frontend Developer

via Pixter

"Azul por Assinatura" product (Azul Seguros and Itaú partnership).

  • Continuous building and evolution of digital insurance journeys, reducing friction in the end-user purchase flow with React and TypeScript.
  • Development focused on organic indexing of landing pages using Next.js SSR/SSG features.
  • Scalable consumption of RESTful APIs, structuring complex backend data for dynamic on-screen rendering.
  • Implementation of unit tests with Jest to ensure stability and prevent production breakages during flow updates.
  • Dependency management and code versioning in a complex multi-repo ecosystem with Git and continuous integration pipelines.

Tech: React.js, Next.js, TypeScript, Effector, Styled Components, Storybook, Jest, REST APIs, GCP, CI/CD, Git

Featured Projects

R.evolution Club website preview

R.evolution Club

Digital wellness, health, and quality of life platform. Full stack work on scalable applications, REST APIs, and service integrations.

React.jsTypeScriptNode.jsFastifyPrismaPostgreSQL
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Azul por Assinatura website preview

Azul por Assinatura

Monthly auto insurance subscription in partnership with Azul Seguros and Itaú. Quote, purchase, logged-in journeys, and high-conversion landing pages.

React.jsNext.jsTypeScriptStorybookJestGCP
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Auto Fácil Itaú website preview

Auto Fácil Itaú

Monthly auto insurance for Itaú customers with special conditions. Digital quote and purchase flows with a focus on performance.

React.jsNext.jsTypeScriptJavaREST APIs
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Courses & Education

Completed

Associate Degree in Systems Analysis and Development

Estácio EAD

Completed

Complete Modern Web Course

Udemy

React.js, Next.js, TypeScript, Node.js, Redux, and Tailwind CSS

Let's work together?

I'm always open to new ideas and opportunities. Get in touch!

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