Jeferson E. Email & Phone Number

Company: People Do Software (PDS)Goals: Helped and engineered software for clients entering/scaling their digital solutions in the cloud. As consequence they're able to see more and scale their business.Achievements: • Resolved delayed screens (stuck for months), improving Kasterweb's release timeline and achieving 4+ stars in the Play Store (React Native, JavaScript, Typescript).• Reduced cart abandonment by integrating Woovi's QRCode in Prestashop, increasing merchant sales by 30% (CSS, HTML, APIs)• Improved app accessibility for users with disabilities who couldn't use key features, boosting usability by 20%. • Successfully managed multiple projects by communicating with diverse clients, ensuring consistent tracking of project metrics and progressTechnologies: GraphQL, Material-UI, Jest, Microservices, Kubernetes - k8s, MongoDB, Typescript, Webpack, ReactJS, Relay, Docusaurus, Git.

Company: Feedback HouseGoals: Maintained and created Feedback House features for feedback-server, feedback-app and feedback-admin products impacting directly HR professionals. Resulting in great and happy client feedbacksAchievements: • Fixed buggy team feature where users couldn't find each other. Managing team members improved by 100% (React, GraphQL, APIs)• Improved app readability for screen reading software. Users with disabilities saw a 20% usability boost using key features (React, Testing, Git)• Engineered feature that helps managers to export data into their ERP. Leaders gained about 15% of their time back• Resolved complex GraphQL issues alongside Relay to ensure seamless integration and optimal performance across both front-end and back-end systemsTechnologies: GraphQL, Jest, Service Workers, TypeScript, NoSQL, MongoDB, BullMQ, Mongoose, MaterialUI, REST API, KoaJS, Circle CI, Docker, RelayJS, Turbo, Docusaurus, Git.

Brasil

Company: WooviGoals: Lauched and engineered Woovi's API integration with Prestashop for the checkout phase. As consequence Prestashop merchants can adopt several reliable pix modalities as payment options.Achievements: • Implemented webhook validation between Woovi API and checkout integration with 100% accuracy• Integrated Woovi's QRCode with Prestashop check-out. Checkout abandonment descreased by about 50%• Engineering customer's Order History integration so that every single purchase reflects in prestashop 100% of the time• Worked closely with the Woovi team to develop the Prestashop e-commerce platform integration with Woovi's payment systemTechnologies: PHP, Prestashop, Wordpress, HTML, CSS, JavaScript, PHP Admin, PostgreSQL (SQL), Docusaurus, Git.

Cuiabá, Mato Grosso, Brasil

Company: KasterwebGoals: Reengineered and deployed to production Kasterweb's flagship product, K-vendas, with major improvements.Achievements: • Resolved delayed screens (stuck for months), improving Kasterweb's release timeline and achieving 4+ stars in the Play Store• Reduced product's api response time in 60% so that customer usability improved by a factor of 2• Improved the codebase's test coverage so that automated testing ensured the app worked 100 of the time• Led the app revamp by designing new models in Figma, developing the app, and preparing it for releaseTechnologies: Typescript, React-Native, Android Studio, Java, Swift, Xcode, MongoDB (NoSQL), PostgreSQL (SQL), Laravel Framework, PHP, Jest (testing) , Redux (state management), React-Router (routing), React Hooks (code reusability), CSS-in-JS.