Verified Expert in Engineering
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.
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.
CTO | Lead Engineer
- 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.
CTO | Lead Engineer
- 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.
Lead React Native Developer
- 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.
React Native Developer
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.
React Native Architect
Home City Ice (via Toptal)
- Reviewed and improved the code.
- Coded the architecture.
- Recommended improvements to the React Native app.
- Guided and instructed developers.
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.
Mobile Tech Lead
- 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.
Senior Mobile Developer
- 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.
- 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.
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.
PagBank (4.8 Star Rating in the App Store)
Sales — PagSeguro (4.7 Star Rating in the App Store)
Foodvine (Social Network)
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)
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
OpenEnglish (Learning Web and Mobile App)http://openenglish.com
React Native, Redux, Django, Next.js, Express.js, Spring Boot, Bootstrap, Tailwind CSS, NestJS, Laravel, Rx
React, React Redux, Redux-Saga, Apiary API, Django ORM, Node.js, REST APIs, Salesforce API, MobX, Stripe, Google Maps API, RxJava, Web3.js, WebRTC, RxJS, FusionCharts
Redux Thunk, GitHub, Expo, Bubble, Google Analytics, React Apollo, Prisma, Trello, Sentry, Zeplin, Figma, WebStorm, Git, Xcode, Android Studio, Visual Studio, Mailchimp, Agora
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)
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
MySQL, PostgreSQL, Cloud Deployment, Elasticsearch, Amazon DynamoDB, MongoDB, Alibaba Cloud, Realm
Project Management, Marketing
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, ChatGPT, 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, 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
Bachelor's Degree in Computer Science
UNICAMP | The University of Campinas - Campinas, Sao Paulo, Brazil
Exchange Studies in Computer Science
Roger Williams University - Bristol, RI, USA