Mateo Marin Wilcke, Developer in São Paulo - State of São Paulo, Brazil
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Mateo Marin Wilcke

Verified Expert  in Engineering

Mobile App Developer

São Paulo - State of São Paulo, Brazil
Toptal Member Since
October 17, 2019

Mateo is not your typical software engineer. Founder, CEO, and CTO of three different startups over his career, he can talk code and tackle complex technical requirements as naturally as he can discuss product, design, UI/UX, business logic, and strategy. Mateo is passionate about translating business plans into amazing front-end experiences and working on high-impact products with challenging technical execution.


React, GraphQL, Node.js, PostgreSQL
Allegis Global Solutions
React, Node.js, TypeScript
MTech (via Toptal)
Firebase, Heroku, WebSockets, GraphQL, PostgreSQL, Redux, React, Node.js




Preferred Environment

GitLab, GitHub, Visual Studio Code (VS Code), Linux, MacOS

The most amazing...

...project I’ve worked on was a news portal for the visually impaired—accessible via voice commands—that won IBM's 2017 BlueHack prize for cognitive computing.

Work Experience

Senior Front-end Developer

2022 - 2023
  • Created the next iteration of the company's customer-facing products, developing new features and capabilities.
  • Developed new visualization features for data labeling and statistics.
  • Maintained the codebase and contributed to back-end architecture decisions and feature implementation.
Technologies: React, GraphQL, Node.js, PostgreSQL

Node.js/React Engineer

2020 - 2022
Allegis Global Solutions
  • Built the company's continuous verification system, which orchestrates and analyzes results from thousands of compute jobs, including simulation and data replay tests. This aimed to reduce reliance on road testing for AV features.
  • Created the company's road incidents reporting system from scratch, which exponentially reduced the time, training, and coordination involved in reporting, auditing, and controlling all data pertaining to road incidents.
  • Worked as part of the company's foundation team, a hand-picked team of engineers tasked with automating as many cross-functional integrated tests as possible, allowing them to operate against a simulated AV bot rather than a physical AV.
Technologies: React, Node.js, TypeScript

Senior Full-stack Engineer

2019 - 2020
MTech (via Toptal)
  • Built a Node.js REST/GraphQL back-end server.
  • Designed the full front-end UI/UX of an application.
  • Built a front-end application in React/Redux.
  • Developed a WebSocket server for relaying instant messages between front-end clients and the back-end server.
  • Implemented web notifications with Firebase.
Technologies: Firebase, Heroku, WebSockets, GraphQL, PostgreSQL, Redux, React, Node.js

CTO | Lead Senior Software Engineer

2018 - 2019
  • Idealized a full-stack application for venue space and service reservations for corporate events.
  • Designed and developed venue-facing and client-facing front-end interfaces with AngularJS, React, and React Native.
  • Constructed a chatbot natural language interface for venue reservation, menu item selection, additional services, and automatic profile-based suggestions.
  • Developed full back-end services and API with Node.js, MongoDB, and PostgreSQL.
  • Designed and developed custom-made dashboards for corporate clients to administer reservations, promote contract bids, and communicate internally with full chat functionality and performance graphs.
Technologies: PostgreSQL, MongoDB, Node.js, React Native, React

CTO | Lead Senior Software Engineer

2016 - 2018
  • Designed a subscription-based coworking space service for renting out underutilized space in restaurants and bars during nonbusiness hours.
  • Built a full back-end service and API to feed both desktop and Facebook chatbot messenger apps.
  • Developed front-end desktop apps for client-facing interface and partner dashboard with AngularJS.
  • Created a chatbot venue reservation interface for Facebook Messenger with React.
  • Implemented Raspberry Pi IoT network technology for user authentication, WiFi-access, and local payments on venues.
Technologies: C++, MongoDB, Node.js, AngularJS, React

Remote Developer

2016 - 2017
First Data Corporation
  • Developed a Swift library for ACH payments module.
  • Implemented graph features for a Clover Go dashboard.
Technologies: Swift


2012 - 2013
Wayout Social Network
  • Created a social network application that matched friends for daily activities and meetups.
  • Led a contracted development team.
  • Developed product functionalities and supervised the product design.
  • Led user test groups.
  • Worked closely with marketing and sales teams to translate needs and features to the development team.
Technologies: Objective-C

Wayout Social Network

I developed a mobile-first social network aimed at joining friends for daily activities and meetups based on Tinder-like interest matching.

News Ear

I built a mobile news portal for the visually impaired with natural language voice command navigation. It won IBM's 2017 BlueHack prize for cognitive computing at South America's largest hackathon.


I created a subscription-based coworking service built on a network of local restaurants and bars that rented out their space during nonbusiness hours.


I developed a marketplace for corporate event reservations of venues, hospitality services, and catering.

Maitre D

I developed a full-stack application for the restaurant services area.
2008 - 2012

Bachelor's Degree in Economics

Fundação Getúlio Vargas - São Paulo, Brazil

2011 - 2011

Earned Credits towards a Bachelor's Degree (Exchange Program) in International Trade Modelling

Sciences PO - Paris, France

2011 - 2011

Earned Credits towards a Bachelor's Degree (Exchange Program) in Financial Algorithms Modeling

The University of Chicago - Chicago, IL, USA


CSMM.101x: Artificial Intelligence (AI)

Columbia University


Machine Learning

Stanford University via Coursera


Full-stack Developer

Coding Dojo


React, Node.js, React Redux, Redux-Saga, Facebook API, jQuery


GitHub, Git, GitLab


React Native, Redux, gRPC, Tailwind CSS, AngularJS


JavaScript, HTML5, Bash Script, GraphQL, TypeScript, CSS, HTML, Go, Swift, Python, Objective-C, Java, C++


REST, Agile


MacOS, Docker, Buildkite, iOS, Heroku, Linux, Firebase, Visual Studio Code (VS Code)


Google Cloud Spanner, MongoDB, PostgreSQL


Mobile App Development, Front-end, Back-end, Chatbots, WebSockets, Artificial Intelligence (AI)

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