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Rael – React, Next.js, JavaScript, experts in Lemon.io

Rael

From Brazil (UTC-3)

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Front-end Web DeveloperStrong senior
25 years of commercial experience
Advertising
AI
Communications
Design
Disaster management
E-commerce
Human resources
Machine learning
Marketing
Sales
UI/UX
Chatbots
Software development
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Rael – React, Next.js, JavaScript

Rael is a highly skilled Web Developer with over 20 years of experience, specializing in front-end web development. His expertise primarily lies in ReactJS, Next.js, and TypeScript, where he has honed his ability to build scalable and efficient web applications. With a solid background in full-life cycle web development, he is passionate about solving complex problems and delivering high-quality solutions. As a Tech Lead, he has demonstrated strong leadership skills, guiding teams through the development process and ensuring the successful execution of projects. He thrives in fast-paced environments and approaches every challenge with creativity and meticulous attention to detail. He is committed to continuous learning, always exploring new technologies and methodologies to improve his craft.

Main technologies
React
7 years
Next.js
3 years
JavaScript
20 years
Typescript
6 years
Additional skills
SASS
Node.js
MySQL
Express.js
MongooseODM
MongoDB
CSS
Angular JS
PHP
Python
Ember.js
UI/UX
jQuery
Redux
Cypress
Jest
Redux Saga
Unity3D
Socket.io
AI
ChakraUI
Ready to start
At least 2 weeks
Direct hire
Potentially possible
Ready to get matched with vetted developers fast?
Let’s get started today!

Experience Highlights

Senior Front-end Developer
Sep 2022 - Dec 20242 years 3 months
Project Overview

This project focused on continuous machinery monitoring, providing critical information such as temperature, pressure, and various other indicators to help prevent accidents. The solution featured a dashboard that displayed indicators separated by plant and area, along with additional tools to support effective monitoring and maintenance.

Skeleton
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Responsibilities:
  • Recreated the application as version 2.0 from scratch, with a pixel-perfect UI and considerable improvement in performance and stability;
  • Consumed large content data for building charts;
  • Created consistent technical documentation.
Project Tech stack:
React
Redux
Redux Toolkit
SCSS
Node.js
Typescript
JavaScript
Jest
Tech Lead and Senior Front-end Developer
Jul 2021 - Sep 20221 year 1 month
Project Overview

This project involved migrating multiple brands under a single e-commerce company to a unified base code, aiming to enhance platform maintenance and reliability. The initiative utilized a micro-frontend architecture and involved four different teams, each focusing on specific aspects of the migration to ensure seamless integration and functionality across all brands.

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Responsibilities:
  • Led a team of 6 front-end developers, ranging from junior to senior levels;
  • Assisted in improving the overall workflow and processes within the team;
  • Contributed to better communication and collaboration among team members;
  • Enhanced documentation practices to ensure clarity and consistency;
  • Played a key role in improving delivery timelines and quality.
Project Tech stack:
React
Redux Toolkit
JavaScript
Typescript
SCSS
ChakraUI
Node.js
Context API
Jest
Enzyme
Senior Front End Developer
Mar 2021 - Jun 20212 months
Project Overview

This project involved developing a chat interface that interacts with an AI backend, powered by RASA Open Source. The system supports voice communication, utilizing Google Speech-to-Text to convert user speech into text. The information is then transmitted to an embedded Unity3D application, which controls a 3D character that engages with the user in real time. The chat application can be easily integrated into any website or system, with the capability to interact with the user's database for more efficient and personalized communication.

Skeleton
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Responsibilities:
  • Created everything from scratch and conducted all the experimentations in communication between React and Unity3D;
  • Created a web chat interface integrated with a custom website;
  • Implemented Google Speech-to-Text functionality for voice input;
  • Developed a live 3D character rendering using Unity3D;
  • Integrated backend with RASA AI (Open Source) for chatbot functionality.
Project Tech stack:
React
Node.js
Redux Toolkit
AI
Google API and Services
Unity3D
Socket.io
SCSS
Senior Front-end Developer
Jul 2020 - Mar 20218 months
Project Overview

This project was designed to facilitate employee evaluations and feedback collection for Human Resources. It provided a platform to streamline the evaluation process and gather insights from employees, helping HR teams assess performance and improve organizational development.

Skeleton
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Responsibilities:
  • Helped to improve the application tech stack - which collaborated with better performance and easier maintenance;
  • Mentored junior employees, providing guidance and support for their professional growth;
  • Implemented best coding practices to ensure high-quality code;
  • Improved project delivery by optimizing workflows and ensuring timely completion of tasks;
  • Conducted code reviews and provided feedback to junior developers;
  • Helped junior developers troubleshoot and resolve technical issues;
Project Tech stack:
React
React Hooks
Redux Saga
Redux Thunk
Next.js
Design system
SCSS
CSS
Typescript
Node.js
Enzyme
Jest
Cypress
Middle Front-end Developer
Apr 2015 - Jun 20205 years 2 months
Project Overview

Worked on various clients and projects within this company, including global multinational corporations across different types of applications. Notable projects included a Quality Assurance System for the production chain, document management solutions, and an e-learning/training system, among others.

Skeleton
Skeleton
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Responsibilities:
  • Developed and maintained responsive, user-friendly interfaces using ReactJS and AngularJS frameworks;
  • Utilized Node.js for server-side programming and API integration.
  • Implemented styling using SASS, ensuring clean, maintainable, and scalable CSS;
  • Managed front-end build processes with Gulp and Grunt for task automation;
  • Ensured compatibility and responsiveness across different browsers and devices using Bootstrap;
  • Collaborated with cross-functional teams to define project requirements and deliver high-quality solutions;
  • Conducted code reviews and maintained high standards of code quality and best practices.
Project Tech stack:
Ember.js
React
React Hooks
CSS
LESS
SCSS
JavaScript
Redux
Redux Thunk
Gulp
Grunt
Angular
Full-stack Developer
Jan 2008 - Apr 20157 years 2 months
Project Overview

The project involved working as an independent developer across various markets and project types. Additionally, it included contributions to other fields such as 3D animation, computer graphics, logo creation, and press media design.

Skeleton
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Responsibilities:
  • Delivered high-quality websites with responsive designs and SEO optimization;
  • Worked across the full cycle, including planning, designing, prototyping, developing, and implementing solutions;
  • Worked as a UX Designer, focusing on user-centered design principles to enhance web application usability;
  • Engineered web applications, ensuring efficient and scalable code;
  • Developed and maintained computer graphics and animations to enhance website interactivity and user engagement;
  • Worked with LESS and SASS for efficient CSS styling and improved maintainability;
  • Managed WordPress websites, ensuring smooth functionality and performance;
  • Developed mobile applications using PhoneGap, integrating web technologies with mobile platforms.
Project Tech stack:
PHP
CSS
SCSS
JavaScript
AJAX
jQuery
Angular
UI
UX
Responsive Web Design
Design system
MySQL

Education

2005
Bachelor of Social Communication with emphasis in Advertising, Publicity and Advertising
Bachelor

Languages

Portuguese
Advanced
Spanish
Intermediate
English
Advanced

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