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.

• 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.
• 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.

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).

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).