Ghaylan Saada Email & Phone Number

Aryanah, Ariana Governorate, Tunisia

Designed, created and scaled a data collection platform enabling businesses to gather insights through diverse methods such as field data collection, surveys, and market research by creating tasks for targeted users based on demographic and/or geographic filters. Users complete these tasks via a mobile app, with data validated and analyzed to provide actionable insights.Key Achievements :📌 Backend Development: Designed and created a scalable microservices architecture using… Show more Designed, created and scaled a data collection platform enabling businesses to gather insights through diverse methods such as field data collection, surveys, and market research by creating tasks for targeted users based on demographic and/or geographic filters. Users complete these tasks via a mobile app, with data validated and analyzed to provide actionable insights.Key Achievements :📌 Backend Development: Designed and created a scalable microservices architecture using Kotlin and Spring Cloud (Cloud Config, Eureka, Gateway, Feign), deployed with Docker and VM. Leveraged MongoDB with advanced aggregation pipelines to manage complex datasets effectively.📌 Custom Common Library: Developed a high-performance library for managing configurations, optimizing input validation with reflection and annotations, and generating dynamic schemas. Implemented JWT-based role-based access control to enhance validation efficiency and security.📌 Mobile App Development: Designed & created a high-performance Android app with 50k+ users and a 4.7 rating using Kotlin and MVVM architecture. Emphasized offline functionality and efficient data management with CameraX, Location APIs, Google Maps, Sensors API, and tools like Retrofit, Room, Kotlin Coroutines, Glide, Dagger, WorkManager, and Paging Library for smooth performance.📌 Internal Data Collection Apps: Designed & created two Android apps for internal use: one for capturing store details (images, location, name, type) and another for collecting product data (barcodes, images, type, packaging). Both apps ensure real-time data synchronization with the backend, providing accurate and up-to-date information. Show less

Gouvernorat De Tunis, Tunisia

Developing an Android application that enables users to make phone calls to their contacts using more affordable alternative mobile networks (Project canceled).

Gouvernorat De Tunis, Tunisia

Developed and implemented an Android application empowering users to:📌 Facilitate real-time chat functionality with phone contacts registered within the application.📌 Enable seamless sharing of pictures, emojis, and locations with contacts.📌 Provide visibility into the status of contacts, including online presence, last connection date and time, and typing indicators.📌 Implemented push notification system for message alerts and notifications upon new registrations of… Show more Developed and implemented an Android application empowering users to:📌 Facilitate real-time chat functionality with phone contacts registered within the application.📌 Enable seamless sharing of pictures, emojis, and locations with contacts.📌 Provide visibility into the status of contacts, including online presence, last connection date and time, and typing indicators.📌 Implemented push notification system for message alerts and notifications upon new registrations of phone contacts within the application Show less