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Wellington Barêa

@wellingtonbara

Message

I build scalable financial web and mobile platforms with React, Next.js, TypeScript, and frontend architecture.

Brazil

Message

I'm building and maintaining Kasta’s cryptocurrency trading platform with Next.js, React, Redux, GraphQL, and AWS Lambda. I also improve reliability and product monitoring through automated testing, Datadog, Sentry, Firebase, and Mixpanel.

At Zup Innovation, I delivered web and mobile financial applications and contributed to Itaú’s AI chatbot training platform and legacy modernization. I helped evolve Micro-Frontend architecture, Design Systems, Clean Architecture foundations, and shared business rules across Next.js and React Native.

Previously, I supported frontend architecture and technical standards at PicPay, built transportation and manufacturing products at Ambev Tech, and developed management systems with PHP, Laravel, React, and Vue.js. I’ve also taught graduate-level frontend courses covering React, Angular, and Vue.js.

Experience

Work history, roles, and key accomplishments

Current

Senior Frontend Engineer

Current

Kasta

Apr 2024 - Present (2 years 5 months)

Develop and maintain a cryptocurrency trading financial platform using Next.js, React, Redux, and SASS. Contribute to frontend architecture, implement unit tests, and optimize performance.

Next.js React Redux Redux toolkit Thunk TypeScript SASS Storybook TurboRepo Atomic Design Jest Testing Library GraphQL React Query Google Lighthouse React Profiler AWS Lambda Datadog Sentry Firebase Mixpanel

Senior Frontend Engineer

Zup Innovation

Jan 2022 - Apr 2024 (2 years 3 months)

Developed web and mobile financial applications using React, Next.js, React Native, and TypeScript. Contributed to frontend architecture with Micro-Frontends and Clean Architecture.

React Next.js React Native Redux Context API TypeScript Angular 12+RxJS Jest Testing Library styled components Design Systems Micro Frontends Clean Architecture

Senior Frontend Engineer

PicPay

Dec 2020 - Jan 2022 (1 year 1 month)

Developed new features for financial applications using Angular, React, and TypeScript. Developed reusable Web Components and implemented automated testing.

Angular 8 React Next.js Redux Redux Saga TypeScript JavaScript StencilJS Storybook Jest Cypress Cucumber Nx (Monorepo)ESLint Prettier SASS RxJS Frontend Architecture Unit Testing

Temporary University Instructor

Universidade do Oeste Paulista

Jan 2020 - Dec 2020 (11 months)

Taught graduate-level courses covering frontend libraries and frameworks including React, Angular, and Vue.js. Created teaching materials and conducted academic activities.

React Angular Vue.Js Frontend Frameworks Teaching Resources

Senior Full Stack Engineer

Ambev Tech

Jan 2019 - Dec 2020 (1 year 11 months)

Contributed to the WMS team for beverage transportation management using React and Redux. Supported backend development with .NET Core and Microservices.

React Redux Redux Saga Jest .NET Core Microservices SOLID Storybook Gatsby Strapi Angular RxJS NgRX Jasmine Datadog Elasticsearch SQL Server RabbitMQ

Full Stack Engineer

Manager

Jun 2017 - Jan 2019 (1 year 7 months)

Developed and maintained internal management systems and websites using PHP, Laravel, MySQL, React, and Vue.js. Implemented new features and resolved bugs.