Matheus – React, React Native, JavaScript

A platform that rewards customers based on their profile. The system automatically reads the client's expense habits and then suggests the best offers and promotions based on the AI agent.

• created front-end and back-end architecture;
• implemented webhook endpoints;
• implemented the entire PoC and MVP for the client;
• worked with banking providers to fetch bank transactions;

A leading trivia platform designed to provide players with a unique multiplayer experience, featuring player-versus-player modes, real-time trivia battles, and a variety of game modes suitable for trivia enthusiasts of all levels.

• Set the technical vision and roadmap for the product, ensuring the platform's scalability to support thousands of concurrent players.
• Led a multidisciplinary team of software developers, game designers, and QA testers, fostering a collaborative environment and boosting productivity by 30%.
• Oversaw the transition to a microservices architecture, resulting in a 50% reduction in server costs and a 40% improvement in response times.
• Integrated WebSocket technology, allowing real-time trivia battles and seamless player interactions.
• Implemented robust security measures to protect player data and prevent cheating, resulting in a 95% reduction in malicious activities.
• Introduced three new game modes, increasing player engagement and retention by 25%.
• Established a CI/CD pipeline, reducing the deployment time by 70% and ensuring seamless game updates.
• Incorporated advanced analytics and monitoring tools, enabling data-driven decisions which led to a 20% increase in monthly active users.
• Worked closely with the marketing and business teams to ensure the technical feasibility of promotional events, which increased player acquisition by 30%.
• Introduced a mentorship program within the tech team, ensuring continuous skill development and reducing turnover rate by 15%.

A large marketplace for cool & fancy products. The scheduled deliveries feature a relatively new product that allows scheduling purchases later on and paying in more than 8 different payment methods.

• Suggested and created the front-end and back-end architecture;
• Implemented responsive designs;
• Built front-end components library;
• Debugged and resolved the application issues using tools like Sentry, ElasticSearch, and Kibana;
• Wrote unit using Jest;
• Integrated with different payment providers such as Paypal and Stripe.

E-commerce helps to shop for favourite brands online from mobile or desktop. They provide the fastest delivery to the doorstep in less than 2 hours.

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• Designed and implemented scalable APIs and background workers;
• Led the development of several products E2E, from identifying system requirements and partner dependencies to workload balancing, software implementation, engineering, testing, and configuring metrics, alarms, monitors, and dashboards;
• Enriched system metrics by integrating the platforms with telemetry; facilitated in-depth logging by correlating APIs with vector contexts;
• Implemented continuous integration, deployment Pipeline Integration, pull requests, code reviews, load/stress testing, unit, integration, and e2e testing;
• Used Git and Gitlab to manage the repository;
• Led a team of 8 engineers and successfully achieved more than 30 million Euros raised and expanded to different countries;
• Managed first- and third-party proprietary licenses that serve millions of requests daily.

A cryptocurrency game.

• Designed interactive game interfaces;
• Integrated Web3 for in-game transactions;
• Collaborated with a team of 5 developers to ensure smooth gameplay.

A web platform for discovery, bookings, and payments in the areas of Wellness and Beauty, powered by a virtual wallet and an ecosystem of benefits and cashback.

• Developed a web platform and a mobile app to allow customers and listings to find product's services via geo-location or searching by specific terms;
• Implemented enterprise applications of administration content Experiment Platforms using Ruby on Rails, React.js, AWS, and Redis;
• Used cloud services via AWS and Heroku to manage the deployment;
• Automated and optimized business logic for the core marketing experiments, including A/B, Auto-Targeting, and Multivariate Testing;
• Used Elixir (Phoenix Framework) and Ruby on Rails to provide the API and the admin panel.

A Global B2B SaaS, empowers you to launch your own white-label NFT store or NFT Marketplace without any technical knowledge

• Oversaw the development team;
• Ensured the secure integration of smart contracts;
• Worked on optimizing loading times for high-resolution NFTs.

One of Brazil's largest segmented e-commerce platforms. The app allows requesting Gas from the service in a fast, practical, and easy way, scheduling purchases, scheduling the next order, or ordering a cylinder immediately through the app.

• Designed and implemented enterprise fintech and administration applications;
• Was an engineering owner of the E2E experience of the commerce platform's cancel, return, and exchange systems;
• Integrated multiple third-party systems with the escrow platform, increasing global revenue and speeding up the charts and reports functionalities;
• Drove monthly revenue of billion of reals using Ruby on Rails, AWS Services, MVC, MySQL, Node.js, React, Redux, and React Native.