Matheus
From Germany (GMT+1)
11 years of commercial experience
Lemon.io stats
3
projects done438
hours workedOpen
to new offersMatheus – React, React Native, JavaScript
Ten years in the IT industry indicate that Matheus is well-versed in complex tasks. As a Team Lead, his robust technical expertise, practical skills, and positive demeanor make him the ideal developer you need to build your dream team. Matheus specializes in React.js, React Native, TypeScript, Ruby on Rails, Node.js, and, more recently, Elixir!
Main technologies
Additional skills
Rewards and achievements
Ready to start
ASAPDirect hire
Potentially possibleExperience Highlights
Chief Technology Officer (CTO)
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%.
Full-Stack Web Developer
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.
Tech Lead
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.
- 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.
Senior Front-End Developer
A cryptocurrency game.
- Designed interactive game interfaces;
- Integrated Web3 for in-game transactions;
- Collaborated with a team of 5 developers to ensure smooth gameplay.
Full-Stack Web Developer
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.
Tech Lead
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.
Full-Stack Web Developer
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.