Willian R.

FullStack Developer

Willian is a FullStack Developer with a front-end focus and five years of commercial experience. He has expertise in frontend development using React, Next.js, and React Native, and is proficient in various technologies, programming languages, and frameworks.

Throughout his career, Willian has worked with companies such as Spin, Yahoo, and other Brazilian enterprises, where he has created performant and reliable applications for customers. His broad skill set and experience make him a valuable asset in developing high-quality software solutions.

Main expertise
  • HTML / CSS 5 years
  • JavaScript
    JavaScript 5 years
  • Next.js
    Next.js 4 years
Other skills
  • Nest.js
    Nest.js 2 years
  • PostgreSQL
    PostgreSQL 2 years
  • Electron
    Electron 2 years
Willian
Willian R.

Brazil

Get started

Selected experience

Employment

  • Frontend Engineer

    Yahoo! - 1 year 9 months

    • Implemented code splitting and cleaned up the application bundle, resulting in significant performance enhancements
    • Successfully optimized web performance for a React project by reducing bundle size by 88.5% and load time by 91.1%
    • Improved time to interact by 67.4%, resulting in a faster and more efficient user experience
    • Successfully migrated state management from alt.js to Redux, resulting in improved performance and a streamlined codebase
    • Demonstrated keen attention to detail and proactive problem-solving skills by identifying possible performance improvements, reporting to the manager, and getting approval to fix it
    • Worked to migrate from JavaScript to TypeScript, improving code maintainability, reducing bugs, and enabling better collaboration with the team

    Technologies:

    • Technologies:
    • JavaScript JavaScript
    • React.js React.js
    • TypeScript TypeScript
    • Redux.js Redux.js
  • Frontend Developer

    Spin - 5 months

    • Redesigned a section of the internal operations tool responsible for the entire scooter fleet
    • Planned and also developed a new trip details page, adding lots of useful information. The information is now helping customer support analyze customers' requests. The feature includes a trip timeline with the scooter's position on the map, even the ability to replay the trip
    • Created a filter based on the proximity of two scooter locations in a trip to prevent two dots from being displayed too close to one another
    • Created an estimated speed calculation for a vehicle on a trip
    • Developed a new and more compact header to help internal users find what they want inside the system

    Technologies:

    • Technologies:
    • React.js React.js
    • TypeScript TypeScript
  • Frontend Developer

    CWI - 2 months

    • Migrated an eCommerce application from React with react-router to Next.js significantly improves performance and SEO optimizations
    • Improved the application's performance in updating global states by migrating them from Recoil to Redux
    • Refactored an Auth mechanism between a React Native WebView and a React application, which resulted in a seamless experience for the user

    Technologies:

    • Technologies:
    • Next.js Next.js
    • React Native React Native
    • React.js React.js
    • Redux.js Redux.js

Education

  • BSc.Computer Science

    Universidade Tecnológica Federal do Paraná · 2017 - 2021

Portfolio

  • porfolio-0
  • porfolio-1
  • porfolio-2

Find your next developer within days, not months

In a short 25-minute call, we would like to:

  • Understand your development needs
  • Explain our process to match you with qualified, vetted developers from our network
  • You are presented the right candidates 2 days in average after we talk

Not sure where to start? Let’s have a chat

First developer starts within days. No aggressive sales pitch.