Agustin Vazquez, Developer in Buenos Aires, Argentina
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Agustin Vazquez

Verified Expert  in Engineering

Mobile Developer

Buenos Aires, Argentina
Toptal Member Since
January 21, 2019

As an entrepreneur, Agustin understands the importance of proactivity and results and has learned the meaning of responsibility and accountability. Agustin is more of a generalist than a specialist, though he loves the detail and deep understanding that comes from intense focus and work on development projects.


React Native, React, Firebase, Twilio Programmable Video
HUB International - TCG
iOS, React Native, Android, Amazon Cognito
React Native, React, Android, iOS, Auth0, Push Notifications, Sentry, CodePush...




Preferred Environment

Xcode, Android Studio, Visual Studio Code (VS Code), MacOS

The most amazing...

...job I've done was to intercommunicate Unity with React Native by using Native Modules to open a native view and callbacks for returning data to Unity.

Work Experience

React Native Developer

2022 - PRESENT
  • Created a user-facing app supported on Android, iOS, and the web, using the React Native for Web library that supported all different screen sizes (phone, tablet, desktop).
  • Implemented Twilio Voice and Twilio Video modules on React Native and React (web).
  • Improved iOS CI/CD time to half by using different caching techniques.
  • Enabled Push Notifications API, CodePush, and Google Analytics.
Technologies: React Native, React, Firebase, Twilio Programmable Video

React Native Developer

2022 - 2022
HUB International - TCG
  • Created a mobile app with website tools for employees. Learned to use AWS Cognito, Face ID, and Multifactor Authentication.
  • Added push notifications, CodePush, and Sentry for crash detection.
  • Added several apps with the same code source supporting different UI colors with Android Flavors and Xcode Targets.
  • Added deep linking and universal linking so it opens the app when entering the website.
Technologies: iOS, React Native, Android, Amazon Cognito

React Native Developer

2022 - 2022
  • Developed an app that uses AI to learn from the user and plans your holidays, arrange dinners, etc.
  • Added push notifications, social sign-ins (Google, Apple), CodePush, and Sentry for crash detection.
  • Created several screens and layouts for the mobile application.
  • Led a team of junior mobile developers, which I supported for the success of the product. Reviewed pull requests daily.
  • Created Google Maps screens, Places API, Directions API and Geofencing. Calculated travel distance for each destination.
  • Developed a digital currency wallet screen that displayed the current balance.
  • Added a Chat feature using React native gifted chat for the front end and Comet Chat for the engine.
Technologies: React Native, React, Android, iOS, Auth0, Push Notifications, Sentry, CodePush, Firebase

React Native Developer

2020 - 2020
  • Developed a home management app in React Native using GraphQL and Apollo Client.
  • Learned about Android instant apps and iOS 14 app clips.
  • Created end-to-end tests using Appium and AWS Device Farm.
Technologies: AWS Device Farm, Appium, GraphQL, iOS, Android, React Native, TypeScript

Mobile Developer

2019 - 2020
Scholly (via Toptal)
  • Added in-app purchase to an existing application.
  • Refactored the entire mobile app to fit high code quality standards.
  • Updated the existing networking libraries to Retrofit and RxJava.
  • Migrated the existing code to Android X.
  • Added new features and fixed bugs to a existing React Native project.
  • Worked with different react workspaces (web and mobile).
  • Created unit tests using JEST.
  • Performed several A/B testing variants with Firebase.
  • Implemented Sentry and CodePush.
  • Used Animated API to improve the UX.
Technologies: React Native, In-app Purchases, Android, RxJava, Retrofit, Java, TypeScript

React Native Developer

2019 - 2019
Toyboy Warehouse
  • Created an app very similar to Tinder to match people.
  • Developed the popular Tinder's swipe-card animation.
  • Coded the in-app purchases and push notifications.
  • Created several animations using the Animated API.
Technologies: Firebase, JavaScript, React Native, TypeScript

React Native and Unity Developer

2019 - 2019
Client (via Toptal)
  • Implemented a bridge from Unity to React Native by using native modules and callbacks.
  • Created a CircleCI YML file to generate the library files automatically.
  • Developed simple modules such as login, register, and friend list.
Technologies: Objective-C, Swift, Android, React Native, Unity, TypeScript

Freelance React Native Developer

2018 - 2018
  • Worked on an app that uses AI by answering a couple of questions, the app detects possible threats for the body and calls the ambulance if an urgent threat is determined. If there is no threat, you can chat with a doctor via text or voice using Matrix SDK and Jitsi Framework.
  • Developed wrappers for React Native frameworks and coded them in Java (Android) and Objective-C (iOS) using native modules.
  • Implemented via OpenGL an interactive human body where you can select parts of the body.
  • Used TouchID, Firebase, and Google Sign for user authentication.
  • Raised €80,000 at Rockstart Accelerator.
Technologies: iOS, Android, Project Management, Redux, JavaScript, React Native

Full-stack Mobile Developer | Technical Director | Co-founder

2013 - 2018
Paisanos Creando
  • Built a VR/AR product for McDonald's with Unity. The app trained new employees on oven usage with AR. The phone detected the oven by using the Vuforia SDK and interactive instructions showed up on the screen. The VR product consisted of a 360° video on Google Cardboard about daily tasks in McDonald's.
  • Developed push notifications with support for different types of users (active, frequent, inactive, and more).
  • Created a mobile tool in Android for training in a Rugby Club. The app consisted of up to 10 phones that were synced with each other via wireless/Bluetooth (sockets). When the game starts, it randomly selects one phone and it shows a screen color or reproduces a sound. The rugby player will respond to that and touch the phone, this will trigger another random phone and so on until the training finishes. The app measures analytics like response time, reaction time, and calculates a score for the training.
  • Developed an app called We Cover in React Native for securing goods, like a car or phone. The app tracked your background location and charged you a daily quota, turned on or off via the mobile application and it was secured only in that timeframe. In case of an unfortunate event occur, you could claim within the app.
  • Performed several DevOps tasks like continuous integration and AWS.
  • Constructed an app similar to Uber Pool and BlaBlaCar using Google Maps SDK, Google Places API, and Google Directions API.
  • Created a video-processing application that overlapped two videos using FFMpeg for Android and GPUImage on iOS.
  • Implemented a geofencing API for iOS and Android in several products.
  • Worked on a VR project for Android and iOS using the Google Cardboard SDK. It consisted of a list of videos about safe driving.
  • Integrated Google Subscriptions (Android) and in-app purchase (iOS) for a monthly subscription application.
  • Built a mobile application in React Native called Cambio Posadas to exchange currency and pick it up using an Exchange API.
  • Created an IoT application to control their heater from your phone for a big national company in Argentina. I also implemented geofencing to turn on/off the heater automatically when you arrive/leave home. Lastly, I also integrated my mobile app and API to an existing system running on the device.
  • Implemented an algorithm to match users with drivers automatically and with customized preferences.
  • Led the mobile development team and built the back-end API on AWS and Bitrise.
  • Created a live event and VOD streaming application using the apple standard HLS. It consisted of a monthly subscription through Apple in-app purchase and Android subscriptions.
  • Used also AWS Elastic Transcoder to convert the raw video to optimized tracks for the HLS playlist.
  • Built an app for sports news that uses the SMS API for monthly subscriptions.
  • Worked in a text-to-speech project that uses regular expressions and discrete mathematics to generate language to be used in the audio processing.
  • Reused the text-to-speech API for another project (Android and iOS).
  • Architected APIs and databases in AWS using Elastic Beanstalk, EC2, security groups, Lambda Serverless, API Gateway, CloudFront, S3, RDS, Elastic Transcoder, and Route 53.
  • Automated development testing flows by using Cucumber, Appium, Bitrise, and AWS Device Farm.
Technologies: Project Management, JavaScript, CSS, HTML, Unity3D, 3D, Unity, Git, Bitrise, Amazon Web Services (AWS), MySQL, PHP, Spring, Java, React Native, iOS, Android

Mobile Developer

2012 - 2013
  • Developed a mobile game using canvas for Android. The game used the accelerometer to detect phone shakes. The canvas was for the progress of the points because it was circular, and at that time, there were no libraries to do that (2012).
  • Learned about phone measuring tools of the phone like GPS, Compass, and Accelerometers used to build a game.
  • Used camera API to scan QR code bars to be able to identify different products within the app.
  • Developed a Bluetooth integration to connect to different devices.
Technologies: BlackBerry, iOS, Android, Java

Android Developer

2011 - 2012
  • Created my first and own mobile product that showed the roadblocks of my city, similar to Waze—ultimately reaching over 50,000 users. Unfortunately, when Waze arrived in Buenos Aires, my project lost almost all its users.
  • Improved my server-side code by using cache techniques to handle over 50,000 users.
  • Created an API in PHP for the mobile application that showed the roadblocks and received roadblock requests from the users.
Technologies: PHP, MySQL, Android, Java

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Toyboy Warehouse
Toyboy Warehouse is the UK’s largest cougar dating app for older women and younger men. Founded over a decade ago, Toyboy Warehouse has helped tens of thousands of mature women and younger men have found love, lust, and romance. Join and start searching today.

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• Fun: Toyboy Warehouse is a thriving community of people looking for love, lust, and romance with mature women and younger men.

We Cover
We Cover is a React Native-based mobile app that secures your goods such as your bicycle, phone, or car. You can add your goods along with their valuation and the app will calculate a daily price for securing the item. You can also turn the security on or off from the app, and it will secure it and charge you the daily security fee until you turn it off. If an unfortunate event happens, you can make a claim through the mobile app.

Fairmarket Home

Fairmarket is a revolutionary platform for homeowners and contractors. However, it is not just a platform - it is a powerful full-range, deeply personalized home improvement, and management app, the first of its kind.

Portfolio Sample App
This is a sample app I developed to work with Animations and React Native for the web, and I built a personal app to showcase to interviewers and recruiters.

This is hosted at
2008 - 2014

Bachelor's Degree in Software Engineering

University of Buenos Aires - Buenos Aires, Argentina

2001 - 2007

High School Diploma in IT (Information and Communication Technology)

ORT High School - Buenos Aires, Argentina





Project Management Expert

Universidad Tecnologica Nacional


React, Retrofit, RxJava, Node.js, RxJava 2, Retrofit 2, Google Maps, Google Places API, React Navigation, React Native for Web


Redux Thunk, Git, GitHub, Android Studio, Xcode, AWS Device Farm, Gradle, Cucumber, CircleCI, Auth0, Sentry, Expo, Amazon Cognito, Twilio Programmable Video


React Native, Spring Boot, Redux, Spring, Unity3D, Unity, Jest, Flutter, Appium, Material UI


Java, JavaScript 6, Swift 4, Objective-C, PHP 5, TypeScript, PHP, HTML, CSS, JavaScript, Swift, GraphQL, SQL, Dart


iOS, Android, Mobile, Firebase, Amazon Web Services (AWS), Bitrise, MacOS, BlackBerry, Vuforia, AWS Lambda, Visual Studio Code (VS Code)


Scrum, Agile Software Development


MySQL, SQL Server 2008, Memcached, Amazon S3 (AWS S3)

Industry Expertise

Project Management


Mobile Apps, APIs, Apollo, 3D, In-app Purchases, Serverless, Google Cardboard, FTP, Video Compression, Video Streaming, Streaming, Videos, A/B Testing, Push Notifications, CodePush, Google Sign-in, Maps, Google Directions, Geofencing, Software Engineering, Software, IT Project Management, UI Animation

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