Mauricio Ize, Developer in Seattle, WA, United States
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Mauricio Ize

Full-stack Developer

Seattle, WA, United States

Toptal member since June 29, 2021

Bio

Mauricio is a full-stack developer with a proven record of delivering high-quality software in collaborative environments. His preferred tech stack includes Java, Spring Framework, NestJS, React, and React Native, which he uses to build web, mobile, and server-side applications. With 10 years of industry experience and a computer science background from the University of Wisconsin and UFRGS, Mauricio is well-equipped to support end-to-end development needs.

Portfolio

Hinge Health
React Native, NestJS, Java, React, PostgreSQL, Redis, Apache Kafka
FullStack Labs
Java, React, React Native

Experience

  • Web - 10 years
  • Databases - 10 years
  • JavaScript - 10 years
  • React Native - 5 years
  • Node.js - 5 years
  • TypeScript - 5 years
  • React - 5 years
  • Google Cloud - 3 years

Preferred Environment

MacOS

The most amazing...

...thing I developed is a customizable audio-delivery feature that has helped thousands of users receive exercise cues adapted to their network speed.

Work Experience

Senior Software Engineer

2022 - 2025
Hinge Health
  • Led the development of multiple projects within an agile team, collaborating closely with product owners, gathering requirements, and delivering features across a microservice-based system and mobile application.
  • Developed the audio playback system for the mobile application, from design to gradual rollout via feature flags. Mentored other engineers and merged changes across multiple microservices and front-end integration.
  • Delivered a custom video player that met product and UX requirements, documented technical decisions, and coordinated across teams, creating a reusable component across the mobile application that reduced development time.
Technologies: React Native, NestJS, Java, React, PostgreSQL, Redis, Apache Kafka

Senior Software Engineer

2021 - 2022
FullStack Labs
  • Implemented an asynchronous video-processing module using BullMQ and a third-party video service to automate generation of adaptive streaming video.
  • Added closed-caption support for video by standardizing VTT, automating ingestion, and updating iOS and Android players to deliver consistent UX and improved accessibility.
  • Integrated an asset-service microservice into the system, configuring containerization with Docker Compose, enabling Kafka event processing, and connecting a CDN via webhook for seamless content delivery.
Technologies: Java, React, React Native

Experience

Group Subscription Application

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 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 the requirements, and used 3rd-party APIs to provide additional services. It was created with Google Cloud Services and TypeScript.

Computer Vision Application

Online video stream processing by applying computer vision techniques to track a person's path inside small retail stores 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.

Audio Stream Delivery

I developed the audio playback system for a mobile application, from design to gradual rollout via feature flags. I also mentored other engineers and managed merges across multiple microservices, front-end integration, and content delivery using the HLS protocol, achieving sub-one-second audio load times and positive feedback from users.

Education

2016 - 2020

Bachelor's Degree in Computer Engineering

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

2014 - 2015

International Academic Proogram in Computer Science in Computer Science

University of Wisconsin - La Crosse, WI, United States

Certifications

JANUARY 2020 - JANUARY 2021

GoStack

RocketSeat

JANUARY 2006 - JANUARY 2007

PHP Application Development

South University of Santa Catarina

JANUARY 2006 - JANUARY 2007

Web Design

Microlins

JANUARY 2006 - JANUARY 2007

Computer Electronics

Núcleo de Educação Profissional Kirana Lacerda

JANUARY 2005 - JANUARY 2006

Programming Logic

Microlins

Skills

Libraries/APIs

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

Tools

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

Languages

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

Frameworks

React Native, Material UI, Jest, Spring, NestJS

Platforms

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

Paradigms

Test-driven Development (TDD), Split Testing

Storage

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

Other

APIs, Web Development, CI/CD Pipelines, Internet of Things (IoT), Styled-components, User Interface (UI), Responsive Design, Apollo Server, Apollo, Google Cloud Functions, Webhooks, Algorithms, Data Structures, 3D Graphics, Image Processing, Compilers

Collaboration That Works

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