Emmanuell Miqueletti

•Developed price range and inventory count features for the Sports Trading Cards pivot module, increasing user engagement by 15% and driving a 20% uplift in traffic to the platform. •Implemented LD schema markup across eBay's website, improving product discoverability and boosting organic search traffic by 25% through enhanced Google indexing. •Contributed to the eBay Motors page revamp, developing fitment signal features that improved parts compatibility accuracy by 30% and reduced customer support inquiries by 12%. •Re-architected the eBay Piano project from microservices to federated GraphQL, reducing API response times by 40% and improving developer productivity by 25%

• Contributed to modernizing FIS Global's retirement platform, improving scalability, performance, and security through system re-architecture. • Designed and implemented core backend functionalities with scalable architecture and performance optimizations. • Collaborated with cross-functional teams to troubleshoot backend services and ensure secure data handling through APIs and cloud infrastructure.

• Created several API endpoints using Java and SpringBoot for a new feature to send and retrieve data from GK. Also check health of application. • Created a Swagger implementation for the initial project with documented endpoints and models. • Documented a branch strategy using Git for repositories to be used by the team to ensure consistency and easy merging. • Implemented SpringAOP to log methods and calls using Dynatrace platform. • Implemented a model UML for a Mapper tool which consumes a Database DB2 metadata visualize the relationships between tables, columns, and data types. • From the Mapper tool created pull data from DB2 and fine tune the data to be used in different request. Impact — The SambaTango Team created new tools and applications to better understand and mapper existing data across Systems and later on create a data flow and POS Modernization. Using the latest technologies

• Assisted in troubleshooting building and deployment issues in Jenkins and Concord, using Docker and Kubernetes. • Created a new proxy API layer to enhance the security of API calls using Node.js and Electrode. • Conducted code reviews and pull requests for different team members, including code refactoring and optimization. • Developed a new component to track network failures in case of page failure. • Implemented a dashboard page for different flows following Figma UX/UI design using ReactJS and TypeScript. • Created a generic component for application-wide use. • Built a form page for the lens page using Redux state management and react-hook-form, applying validations. • Optimized page loading time using React lazy loading, code splitting, and hooks like useMemo and useCallback. • Utilized TypeScript to design and implement new UX/UI components that are shareable across the application. Impact: • The Iris team and Iris project is relatively new, and with the implementation of the project, Walmart can have a next-level application using modern technologies.

• Exposed new endpoints to process a large set of data in MongoDB using Spring Boot and Java to provide data correction for hotels and vacation rentals. • Created a new mechanism of retrying messages in AWS SQS using Spring Boot and Java to ensure the hotels are onboarded correctly. • Conducted weekly review of reports in Splunk, addressing bugs and enhancing user experience through ticket creation. • Enhanced data classification for hotel and vacation rentals by updating an internal library Artifactory and using JavaScript. • Implemented an enhanced address validation flow utilizing Redux to ensure accurate and less error-prone data from users. • Migrated two different legacy projects from non-responsive to a responsive, modern, and robust layout using ReactJS library. • Implemented metrics using ReactJS and Google Analytics ClickStream Data to track the user experience and help business decisions. • Utilized GraphQL and TypeScript to design and implement a new UX/UI workflow for the last step page of onboarded properties, enhancing opportunities for users.

• Managed Webhook functionality using Spring Boot and ReactJS, enabling integration with external systems and enhancing the overall system capabilities. • Integrated an external service (eWeb) Enterprise Web to validate specifications, leveraging Spring Boot and ReactJS for improved accuracy and efficiency in validating specifications. • Wrote efficient stored procedures to save data in the Oracle Database, optimizing data storage and retrieval processes. • Created a new API from scratch to manage a legacy system dating back to the 1960s, modernizing the system and improving its overall performance and maintainability. • Implemented an upload system with Redux to validate and populate data from Excel sheets into the Oracle Database, ensuring data accuracy and integrity. • Designed and developed ReactJS components that enhanced the functionality and user experience of the VNFMarketplace platform. • Performed regular maintenance and resolved bugs in the internal system of VNFMarketplace, ensuring smooth operation and user satisfaction. • Analyzed the migration process from React 15 to React 16 and executed a partial migration, leveraging the latest features and improvements of React to enhance the system’s performance and maintainability. • Addressed security vulnerabilities by applying necessary fixes using appropriate npm package libraries and JavaScript libraries, ensuring a secure and robust system.

• Designed a secure cash flow system using Angular and Bootstrap, which effectively reduced bank fees for both the company and customers while enhancing daily convenience. • Developed and implemented comprehensive API unit tests for the mobile application using SpringBoot, ensuring the reliability and functionality of the endpoints. • Seamlessly integrated third part API into the existing system’s backend, expanding its capabilities and enabling seamless communication with external services. • Designed and executed scripts to redesign the internal database structure and successfully migrated data in MySQL, optimizing data storage and retrieval processes while ensuring data integrity. • Built new CRUD ReactJS Form interactions for internet clients with several dynamic features and validations, resulting in a significant increase in the speed of registration. • Created a comprehensive REST API using Spring and MySQL, seamlessly handling all business logic across the company. • Implemented client data reports by leveraging MySQL queries and the PHP open-source tool Reportico, enabling efficient generation of insightful reports.