* Build robust APIs, design API endpoints, handle data storage and retrieval, ensure data security andvalidation* Manage the database layer for the application, design schema, optimization and ensuring data consistency* Authentication and authorization through firebase and in back-end* Handle complex business logic, data processing and calculations on the server side to improve app performanceand security* Ensure functionality and service flow in the application including file processing, stream upload, image processingusing phpSpreadsheet/phpOffice plugin* Build and launch new apps using back-end code* API implementation on the front-end in Flutter for hybrid application development* Implement authentication and authorisation for app, firebase hosting, functionalities, real time features like chat,push-notification etc, building e-commerce functionalities like orders management, profile management, OAuth2authentication, payment gateway integration, dynamic links, QR code functionalities and many more in the front-end application

Roles & responsibilities:• Communicated on a regular basis with the Product Owner and collected productspecifications• Assigned tasks to the Development team, and ensured feature delivery.• Developed features on Flutter by consuming the REST APIs• Front-end development of the CityGuideSpain Mobile Application for Android & iOS• Learnt new programming languages & tools - NodeJS, AngularJs, Redsys API to adapt withchanging product architecture • Frontend deployment and maintenance of CityguideSpain website• Backend deployment and maintenance of CityguideSpain on server• Developed important features for mobile application like map implementation, payment system, mailing services etc.• Developed REST APIs in NodeJS• Provided support and maintenance for the app