Mauricio Ize, Developer in Denver, United States
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Mauricio Ize

Verified Expert  in Engineering

Full-stack Developer

Denver, United States
Toptal Member Since
June 29, 2021

Mauricio is a full-stack developer with a history of delivering exemplary work within teams to build software solutions. His favorite stack—to develop all kinds of applications from web and mobile to server-side—includes React, React Native, and Node.js. With a decade of work experience in the software computer industry under his belt and having been educated in computer science at UFRGS and the University of Wisconsin, it's safe to say Mauricio can deliver your full-stack development needs.


FullStack Labs
JavaScript, TypeScript, React, React Native, Node.js, Responsive Design...
JavaScript, Databases, React, React Native, Node.js, Amazon Web Services (AWS)...
University of Wisconsin
Java, C++, Spring




Preferred Environment

MacOS, Linux

The most amazing...

...thing I've developed is an in-app payment service with different wallet properties for each user.

Work Experience

Senior Software Engineer

2021 - PRESENT
FullStack Labs
  • Planned, implemented, and maintained high-quality software using the JavaScript/TypeScript stack—React, React Native, and Node.js—to create solutions and improve users' lives.
  • Tracked and fixed bugs using Jira as a reporting tool.
  • Researched different subjects and reported my findings using diagrams to help the team make the best decisions.
  • Worked with functional components and modern hooks and maintained the legacy class component and Redux store.
  • Created and maintained Native components to manage low-level features such as Bluetooth connection.
  • Worked with animations and gestures using an old and new approach, trying to avoid bridge communication between React and Native layer to increase the performance and user experience.
  • Contributed to the integration with different APIs using REST and GraphQL.
Technologies: JavaScript, TypeScript, React, React Native, Node.js, Responsive Design, User Interface (UI), Apollo, React Apollo, Apollo Server, NestJS, GraphQL, Split Testing, Sentry, Webhooks

Software Engineer

2016 - 2020
  • Developed key features on Android and iOS applications such as real-time chats and in-app payments; customized the file system for users.
  • Installed back-end services using Google Cloud such as authentication, messaging, and cloud functions.
  • Integrated with SQL and NoSQL databases, locally and in the cloud, such as Firebase, DynamoDB, PostgreSQL, MongoDB, and Redis.
  • Worked directly on the canvas using Context2D and WebGL to render custom animations handling FPS and user interface events.
  • Implemented communication using to meet real-time communication needs.
Technologies: JavaScript, Databases, React, React Native, Node.js, Amazon Web Services (AWS), Google Cloud, Firebase, HTML, CSS, HTML5, Mobile, Responsive Design, User Interface (UI), Web Development

Software Engineer

2014 - 2015
University of Wisconsin
  • Created an Android application to allow users to take photos and send them over WiFi to a remote server.
  • Implemented few server-side image processing techniques using C++ such as mapping algorithms and feature detectors to try to recognize buildings previously registered in the database with a degree of similarity.
  • Built a device to measure the power consumption of a single outlet by taking several samples of the field and sending the information over WiFi to a local server.
  • Developed a web application to allow users to visualize the power consumption via charts and to offer an interface to select a connected device to turn the power outlet on or off.
Technologies: Java, C++, Spring

Software Engineer

2012 - 2014
  • Developed a web application to provide online quizzes.
  • Built a web server to handle quizzes requests from each device.
  • Handled communication using different socket protocols.
Technologies: Java, HTML, CSS, JavaScript, Databases

Software Engineer

2005 - 2011
  • Created dynamic web applications using Flash and ActionScript.
  • Implemented basic features in the back end using Java and PHP.
  • Developed full web applications for different industry types.
  • Modeled MySQL database for different users' case scenarios.
Technologies: PHP, MySQL, Java, Web, HTML, CSS, JavaScript, Web Development


Gestorama allows consultants and influencers to create and share groups with exclusive content by charging their clients through monthly subscriptions.

The app's front end, which provides a great user experience and follows the guidelines for material design. I designed and prototyped the application screens and implemented them using React Native.

I also implemented the serverless REST API using Google Cloud Functions to handle all the traffic and manage payments, authentication, and notifications. I implemented each endpoint to provide all the data for the front-end application while following requirements and used third-party APIs to provide services. It was created with Google Cloud Services and TypeScript.

Computer Vision Back-end Application

I built an app that can process an online video stream by applying computer vision techniques to track a person's path inside a small store to extract information about customer behavior. Geometric and deep features are extracted from each video frame, categorized and a graph is mounted to later be able to report extracted information.


JavaScript, TypeScript, HTML, CSS, HTML5, CSS3, GraphQL, Java, C++, PHP


React Native, MUI (Material UI), Jest, Spring, NestJS


React, Node.js, Sockets, WebRTC, Socket.IO, OpenCV


Mobile, Firebase, Amazon Web Services (AWS), Web, Docker, WordPress, AWS Lambda


APIs, Web Development, CI/CD Pipelines, Internet of Things (IoT), Styled-components, User Interface (UI), Responsive Design, Apollo Server, Apollo, Google Cloud Functions, Webhooks


Git, Webpack, Figma, React Apollo, Docker Compose, Sentry


Test-driven Development (TDD), Split Testing


Databases, PostgreSQL, MongoDB, MySQL, Redis, Google Cloud, Amazon DynamoDB

2016 - 2020

Bachelor's Degree in Computer Engineering

Federal University of Rio Grande do Sul - Porto Alegre, Brazil

2014 - 2015

Exchange Year in Computer Science

University of Wisconsin - La Crosse, WI, United States


Rocketseat Bootcamp



PHP Application Development

South University of Santa Catarina


Web Designer



Computer Electronics

Núcleo de Educação Profissional Kirana Lacerda


Programming Logic