Alexandre Augustus, Developer in São Paulo - State of São Paulo, Brazil
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Alexandre Augustus

Verified Expert  in Engineering

CTO Developer

Location
São Paulo - State of São Paulo, Brazil
Toptal Member Since
November 11, 2019

Alex is a CTO and lead developer with product and leadership skills and several years of hands-on experience and technical expertise. This hard-to-come-by skillset allows him to translate business and user needs while overcoming technical challenges to build excellent products. Alex helped PagSeguro transition into a unicorn company by transforming their digital wallet app into a fully digital bank. He has also served as the CTO of multiple startups through Toptal.

Portfolio

Private Company
Chief Product Officer (CPO), Architecture, JavaScript, HTML, CSS, SQL...
Orsy Inc.
React Native, React, Node.js, PostgreSQL, Python, Django...
Foodvine
React Native, Django, Twilio, Mailchimp, Maps, iOS, Android, Python, Bitrise...

Experience

Availability

Part-time

Preferred Environment

React, Next.js, React Native, Django, Python, Node.js, JavaScript, TypeScript, Artificial Intelligence (AI), CTO, Vue

The most amazing...

...project I've led was the development of a digital bank from scratch while also helping the financial company assemble an in-house product team.

Work Experience

CPO

2023 - PRESENT
Private Company
  • Led the redesign and architecture of existing software with over 400 features.
  • Built processes to increase the company's development efficiency by up to 80%.
  • Innovated the product, resulting in customer satisfaction and a decrease of 85% in support calls.
Technologies: Chief Product Officer (CPO), Architecture, JavaScript, HTML, CSS, SQL, Google Cloud Platform (GCP), React, CTO, OpenAI

CTO | Lead Engineer

2022 - PRESENT
Orsy Inc.
  • Led the team to develop a live-streaming social network using React Native.
  • Oversaw all the development, mentored, and helped with the most challenging parts of the application.
  • Determined critical business decisions alongside the CEO.
Technologies: React Native, React, Node.js, PostgreSQL, Python, Django, Amazon Web Services (AWS), AWS Cloud Architecture, Software Architecture, Video Streaming, Full-stack, Smart Contracts, Web3.js, GitHub, Next.js, Expo, WebRTC, VoIP, HTML, Sass, Express.js, Bubble, Webhooks, Bootstrap, Google Analytics, Google Tag Manager, Elasticsearch, Payment APIs, Machine Learning, Product Owner, Technical Product Management, OpenAI GPT-4 API, Artificial Intelligence (AI), Natural Language Processing (NLP), SaaS, ChatGPT, System Architecture, Gamification, Mobile, Chatbots, Web Development, SQL, Digital Payments, Online Payments, Serverless, Kubernetes, Amazon DynamoDB, Tailwind CSS, IT Management, Software Engineering, Engineering Management, Delivery Management, NestJS, Docker, Azure, Vercel, Push Notifications, Location Tracking, Cross-platform, MobX, Apollo, React Apollo, Mapbox, LangChain, OpenAI GPT-3 API, Supabase, Prisma, Trello, Sentry, HTML5, Subscriptions, Hiring, Investments, Charts, Stripe, Microservices, Google Maps API, OpenAI

CTO | Lead Engineer

2021 - 2021
Foodvine
  • Led the technical team to develop a food delivery and social network app.
  • Motivated and managed the development team to deliver top quality and performance.
  • Translated business needs into technical requirements while being a focal point to product and technical decisions.
Technologies: React Native, Django, Twilio, Mailchimp, Maps, iOS, Android, Python, Bitrise, JavaScript, CTO, React, Node.js, APIs, Redux, Technical Leadership, Objective-C, Swift, CI/CD Pipelines, Amazon Web Services (AWS), TypeScript, GraphQL, Mobile Development, App Store, Google Play Store, CSS, WiFi, Smart Cameras, Cloud Deployment, Full-stack Development, Scalable Application, Architecture, DevOps, Back-end, Front-end, Leadership, Team Leadership, Firebase, Project Planning, Requirements Analysis, Product Strategy, Project Management, PostgreSQL, REST APIs, Metrics, AWS Cloud Architecture, Software Architecture, Full-stack, GitHub, Next.js, Expo, HTML, Sass, Express.js, Bubble, Webhooks, Bootstrap, Google Analytics, Google Tag Manager, Elasticsearch, Payment APIs, Machine Learning, Product Owner, Technical Product Management, Artificial Intelligence (AI), SaaS, System Architecture, Gamification, Mobile, Chatbots, Web Development, SQL, Digital Payments, Online Payments, Serverless, Kubernetes, Amazon DynamoDB, Tailwind CSS, IT Management, Software Engineering, Engineering Management, Delivery Management, NestJS, Docker, Azure, Vercel, Push Notifications, Location Tracking, Cross-platform, MobX, Apollo, React Apollo, Supabase, Prisma, Trello, Sentry, HTML5, Subscriptions, Hiring, Charts, Stripe, Microservices, Google Maps API

Lead React Native Developer

2020 - 2021
Belk
  • Led the development of an eCommerce app using React Native.
  • Created everything from scratch while connecting to a complex API that was not mobile-friendly.
  • Built middleware APIs to make it more mobile-friendly through Firebase cloud.
Technologies: React Native, iOS, Android, Team Leadership, JavaScript, React, Node.js, APIs, Redux, Technical Leadership, Objective-C, Swift, CI/CD Pipelines, GraphQL, Amazon Web Services (AWS), TypeScript, Mobile Development, App Store, Google Play Store, CSS, WiFi, Cloud Deployment, Full-stack Development, Scalable Application, Architecture, DevOps, Back-end, Front-end, Leadership, Firebase, Project Planning, Requirements Analysis, Product Strategy, Project Management, REST APIs, Metrics, AWS Cloud Architecture, Software Architecture, Full-stack, eCommerce, GitHub, Next.js, Expo, HTML, Sass, Express.js, Webhooks, Bootstrap, Google Analytics, Google Tag Manager, Elasticsearch, Payment APIs, Machine Learning, Product Owner, Technical Product Management, Bluetooth, Artificial Intelligence (AI), SaaS, System Architecture, Gamification, Mobile, Web Development, SQL, Digital Payments, Online Payments, Serverless, Kubernetes, Amazon DynamoDB, IT Management, Software Engineering, Engineering Management, Delivery Management, Salesforce API, NestJS, Docker, Azure, Push Notifications, Location Tracking, Cross-platform, MobX, Apollo, React Apollo, Mapbox, Supabase, Prisma, Trello, Sentry, HTML5, Subscriptions, Hiring, Charts, Stripe, Microservices, Google Maps API

React Native Developer

2020 - 2020
Blue Light Holdings, Inc
  • Improved app performance, created social sharing features, and more.
  • Integrated with Instagram and Facebook. Improved video performance.
  • Created a draggable clock timer component to help users time their exercises.
Technologies: React Native, Redux, TypeScript, APIs, Leadership, Team Leadership, Firebase, Requirements Analysis, Project Management, PostgreSQL, REST APIs, Metrics, AWS Cloud Architecture, Software Architecture, Full-stack, GitHub, Next.js, Expo, HTML, Webhooks, Bootstrap, Google Analytics, Google Tag Manager, Elasticsearch, Payment APIs, Product Owner, Technical Product Management, Bluetooth, SaaS, System Architecture, Gamification, Mobile, Chatbots, Web Development, SQL, Digital Payments, Online Payments, Serverless, Kubernetes, Amazon DynamoDB, IT Management, Software Engineering, Engineering Management, Delivery Management, Embedded Software, Embedded Linux, NestJS, Docker, Azure, Push Notifications, Location Tracking, Cross-platform, Apollo, React Apollo, Mapbox, Trello, Sentry, HTML5, Subscriptions, Hiring, Investments, Charts, Stripe, Microservices, Google Maps API

React Native Architect

2020 - 2020
Home City Ice (via Toptal)
  • Reviewed and improved the code.
  • Coded the architecture.
  • Recommended improvements to the React Native app.
  • Guided and instructed developers.
Technologies: Android, iOS, React Native, JavaScript, React, APIs, Redux, Technical Leadership, Objective-C, Swift, CI/CD Pipelines, GraphQL, Amazon Web Services (AWS), TypeScript, Mobile Development, App Store, Google Play Store, CSS, WiFi, Heroku, Cloud Deployment, Scalable Application, Architecture, DevOps, Front-end, Leadership, Team Leadership, Firebase, Project Planning, Requirements Analysis, Product Strategy, Project Management, PostgreSQL, REST APIs, Metrics, AWS Cloud Architecture, Software Architecture, Full-stack, GitHub, Next.js, Expo, HTML, Webhooks, Bootstrap, Google Analytics, Google Tag Manager, Elasticsearch, Payment APIs, Technical Product Management, Bluetooth, System Architecture, Mobile, Web Development, SQL, Digital Payments, Online Payments, Serverless, Kubernetes, Amazon DynamoDB, IT Management, Software Engineering, Engineering Management, Delivery Management, Docker, Push Notifications, Location Tracking, Cross-platform, Apollo, React Apollo, TV, TV UI, Mapbox, Trello, Sentry, HTML5, Subscriptions, Hiring, Stripe, Microservices

Lead Developer

2019 - 2020
Crefisa | Credit, Finances, and Investments
  • Led a team of 12 developers to build a digital bank from scratch.
  • Created a lead product team within the company and assigned employees to each of the lacking product areas.
  • Mediated among business, product, and technical needs, acting as a focal point for the entire mobile app.
  • Built integration systems to work with existing apps and services.
  • Helped estimate and prioritize product and technical tasks.
Technologies: iOS, Android, React Native, JavaScript, CTO, MySQL, React, APIs, Redux, Technical Leadership, Objective-C, Swift, CI/CD Pipelines, GraphQL, Amazon Web Services (AWS), TypeScript, Mobile Development, App Store, Google Play Store, CSS, WiFi, Smart Cameras, Scalable Application, Architecture, DevOps, Front-end, Leadership, Team Leadership, Firebase, Project Planning, Requirements Analysis, Product Strategy, REST APIs, Metrics, Fintech, AWS Cloud Architecture, Software Architecture, Desktop App Development, Full-stack, GitHub, Next.js, Expo, HTML, Google Cloud Platform (GCP), Webhooks, Bootstrap, Google Analytics, Google Tag Manager, Elasticsearch, Payment APIs, Product Owner, Technical Product Management, Bluetooth, System Architecture, Mobile, Web Development, SQL, Digital Payments, Online Payments, B2B Wallets, Amazon DynamoDB, IT Management, Software Engineering, Engineering Management, Delivery Management, Docker, Push Notifications, Location Tracking, Cross-platform, Apollo, React Apollo, tvOS, HTML5, Subscriptions, Hiring, Investments, Stripe, Microservices, Google Maps API

Mobile Tech Lead

2016 - 2018
Original Bank
  • Led a team of ten mobile developers in the creation of a digital bank app.
  • Oversaw the React Native training session for the mobile team.
  • Created development guidelines for the mobile team.
  • Spearheaded the development of multiple apps that supported the core digital bank services.
  • Improved the App Store review rating from 3.5 to 4.7 in two years.
  • Integrated React Native with Twilio using the backend as a gateway.
Technologies: iOS, Android, React Native, JavaScript, MySQL, React, APIs, Redux, Technical Leadership, Objective-C, Swift, CI/CD Pipelines, GraphQL, TypeScript, Mobile Development, App Store, Google Play Store, CSS, WiFi, Smart Cameras, Scalable Application, Architecture, Front-end, Leadership, Team Leadership, Firebase, Project Planning, Requirements Analysis, Product Strategy, Project Management, REST APIs, Metrics, Fintech, AWS Cloud Architecture, Software Architecture, Full-stack, GitHub, Next.js, HTML, Google Cloud Platform (GCP), Webhooks, Google Analytics, Google Tag Manager, Elasticsearch, Payment APIs, Product Owner, Technical Product Management, System Architecture, Mobile, Web Development, SQL, Digital Payments, Online Payments, B2B Wallets, IT Management, Software Engineering, Engineering Management, Delivery Management, Docker, Push Notifications, Location Tracking, Cross-platform, HTML5, Subscriptions, Hiring, Investments, Microservices, Google Maps API

Senior Mobile Developer

2014 - 2016
PagSeguro UOL
  • Developed a digital wallet app.
  • Transformed the digital wallet into a fully digital bank app.
  • Created credit card app features.
  • Developed the main bank account's app features.
  • Constructed multiple MVPs to validate business ideas.
Technologies: Kotlin, Java, iOS, Android, JavaScript, MySQL, Node.js, APIs, Mobile Development, Google Play Store, WiFi, Architecture, Front-end, REST APIs, Metrics, Fintech, Software Architecture, Full-stack, GitHub, Next.js, PHP, HTML, Google Cloud Platform (GCP), Webhooks, Google Analytics, Google Tag Manager, Elasticsearch, Product Owner, System Architecture, Mobile, Web Development, SQL, Digital Payments, Online Payments, B2B Wallets, IT Management, Software Engineering, Engineering Management, Delivery Management, Docker, Push Notifications, Location Tracking, Cross-platform, WooCommerce, Subscriptions, Hiring, Investments, Microservices, Google Maps API

Full-stack Intern

2013 - 2014
VISIUM
  • Developed a field service app for a big internet company.
  • Created a modem scanning app.
  • Maintained the app's API C# services.
  • Created GPS- and map-focused apps.
Technologies: Model View Controller (MVC), C#, Java, Android, MySQL, Node.js, APIs, Kotlin, Amazon Web Services (AWS), Mobile Development, App Store, Google Play Store, CSS, WiFi, Full-stack Development, Architecture, Front-end, Product Strategy, REST APIs, Metrics, Software Architecture, Desktop App Development, Full-stack, GitHub, Next.js, PHP, HTML, Express.js, Spring Boot, Transportation & Logistics, Webhooks, Google Analytics, Google Tag Manager, Elasticsearch, System Architecture, Mobile, SQL, Software Engineering, Embedded Software, Docker, Push Notifications, Location Tracking, Cross-platform, Mapbox, WooCommerce, Subscriptions, Hiring, Microservices, Google Maps API

Independent Developer

2010 - 2013
Freelance Work (Apps for the Google Play Store)
  • Developed the SnapSave Pro app.
  • Constructed the app called WhatsApp Offline.
  • Developed and maintained proprietary apps.
  • Researched users and developed products to suit their needs.
  • Constructed an image-editing app.
Technologies: REST, Java, Android, CTO, MySQL, React, Node.js, Shopify, APIs, Redux, Technical Leadership, Kotlin, Objective-C, Swift, Amazon Web Services (AWS), GraphQL, Mobile Development, App Store, Google Play Store, CSS, WiFi, Smart Cameras, Heroku, Cloud Deployment, Full-stack Development, Scalable Application, Architecture, DevOps, Back-end, Front-end, Blockchain, Crypto, Firebase, Requirements Analysis, Product Strategy, Project Management, PostgreSQL, REST APIs, Metrics, AWS Cloud Architecture, Software Architecture, Desktop App Development, Full-stack, GitHub, Alibaba Cloud, WebRTC, VoIP, PHP, HTML, WordPress, Sass, Express.js, Spring Boot, Bubble, Webhooks, Google Analytics, Google Tag Manager, Elasticsearch, Product Owner, C++, Technical Product Management, Bluetooth, System Architecture, Mobile, Community Growth, Web Development, SQL, Software Engineering, Embedded Software, Embedded Linux, Salesforce API, Docker, Push Notifications, Location Tracking, Cross-platform, MobX, TV Broadcasting, Broadcasting, TV, tvOS, TV UI, Over-the-top Content (OTT), Mapbox, HTML5, WooCommerce, Subscriptions, Hiring, Charts, Microservices, Google Maps API, Web Scraping

PagBank (4.8 Star Rating in the App Store)

I supported the transformation of PagBank's app from a digital wallet to a digital bank. I served as the lead developer for multiple features: credit card, prepaid card, multiple cards, checking account, savings account, and transactions.

Sales — PagSeguro (4.7 Star Rating in the App Store)

I developed and maintained a sales app for PagSeguro for their credit/debit card machine users. The app connected to the machine via Bluetooth and had everything necessary for the user to carry out the sale. The app also allowed them to view purchases, print receipts, and manage their digital wallet account.

Original Bank

https://play.google.com/store/apps/details?id=br.com.original.bank&hl=pt_BR
I led a React Native team of ten developers in the build of this digital bank app. I created guidelines for the mobile team and not only developed multiple apps to support the core digital bank services but also increased the app store review rating from 3.5 to 4.7 in two years.

Belk eCommerce

https://apps.apple.com/us/app/belk/id673347869
Developed iOS and Android apps from scratch using React Native to replace Belk's native apps. Created intermediary APIs using Firebase Cloud to serve the app using Salesforce API from their existing Web app.

Foodvine (Social Network)

I was the CTO and lead developer of Foodvine, a social network built on React Native, Django, Python, and AWS.

Foodvine allows users to browse authentic recipes that suit their dietary needs, such as keto, gluten-free, vegan, weight-loss, or hop in a cooking class and interact with step-by-step instructions on cooking global flavors from the community.

Orsy (Live Streaming Social Network)

I was the CTO/Lead Developer of Orsy, a live-streaming social network built on top of React Native, Django, Python, AWS, Agora, and Blockchain(Polygon).

With Orsy, anyone can become a citizen journalist simply by capturing content that gives the community a front-row seat and insight into current events or the news of the day, and the community can see any event from multiple citizen journalist perspectives, rewarding those who upload the compelling content.

Raven Health (Mobile and Web App)

http://ravenhealth.com
I developed a React Native mobile app and React/Next.JS Web app for a health care provider. Backed by military-grade data security with an interface so easy to use, you can onboard in 15 minutes. It comes with an offline mode as well.

OpenEnglish (Learning Web and Mobile App)

I handled the development of both the web and mobile platforms for Openenglish.com, a global language education company. The architectural decisions were all made to guarantee huge scalability to the client.
2010 - 2014

Bachelor's Degree in Computer Science

UNICAMP | The University of Campinas - Campinas, Sao Paulo, Brazil

2012 - 2013

Exchange Studies in Computer Science

Roger Williams University - Bristol, RI, USA

Libraries/APIs

React, React Redux, Redux-Saga, Apiary API, Django ORM, Node.js, REST APIs, Salesforce API, MobX, Stripe, Google Maps API, Vue, RxJava, Web3.js, WebRTC, RxJS, FusionCharts

Tools

Redux Thunk, GitHub, Expo, Bubble, Google Analytics, ChatGPT, React Apollo, Prisma, Trello, Sentry, Zeplin, Figma, WebStorm, Git, Xcode, Android Studio, Visual Studio, Mailchimp, Agora

Frameworks

React Native, Redux, Django, Next.js, Express.js, Spring Boot, Bootstrap, Tailwind CSS, NestJS, Laravel, Rx

Languages

JavaScript, Java, Kotlin, Python, SQL, HTML, TypeScript, GraphQL, CSS, Sass, HTML5, C++, PHP, Objective-C, Swift, C#, Go

Paradigms

REST, Agile, Functional Programming, Asynchronous Programming, Mobile Development, Scalable Application, DevOps, Requirements Analysis, Desktop App Development, Gamification, Cross-platform, Microservices, UX Design, Model View Controller (MVC)

Platforms

iOS, Android, Linux, Windows, Firebase, Amazon Web Services (AWS), WordPress, Google Cloud Platform (GCP), Mobile, Kubernetes, Docker, Azure, Vercel, tvOS, Mapbox, WooCommerce, Twilio, Shopify, Heroku, Blockchain, Embedded Linux, MacOS, Bitrise

Storage

MySQL, PostgreSQL, Cloud Deployment, Elasticsearch, Amazon DynamoDB, MongoDB, Alibaba Cloud, Realm

Industry Expertise

Project Management, Marketing

Other

Leadership, Technical Leadership, Team Leadership, CTO, APIs, CI/CD Pipelines, App Store, Google Play Store, WiFi, Smart Cameras, Architecture, Back-end, Front-end, Project Planning, Product Strategy, Metrics, Fintech, AWS Cloud Architecture, Software Architecture, Video Streaming, Full-stack, eCommerce, Webhooks, Google Tag Manager, Payment APIs, Machine Learning, Product Owner, Technical Product Management, Bluetooth, OpenAI GPT-4 API, Artificial Intelligence (AI), Natural Language Processing (NLP), SaaS, System Architecture, Chatbots, Community Growth, Web Development, Digital Payments, Online Payments, B2B Wallets, Serverless, IT Management, Software Engineering, Engineering Management, Delivery Management, Push Notifications, Location Tracking, Apollo, TV Broadcasting, Broadcasting, TV, TV UI, Over-the-top Content (OTT), OpenAI GPT-3 API, Supabase, Subscriptions, Hiring, Investments, Charts, Data Scraping, Web Scraping, OpenAI, App UX, App UI, Product Design, Product Management, Tech Sales, Full-stack Development, Crypto, Smart Contracts, VoIP, Transportation & Logistics, Embedded Software, LangChain, Maps, Social Networks, Polygon, GetStream.io, Chief Product Officer (CPO)

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