Oussema Aroua

- Managed and mentored a team of 3 developers, collaborating directly with UX/UI designers and cross-functional business stakeholders to align product requirements. - Architected core cross-platform feature sets utilizing Kotlin Multiplatform (KMP/KMM), reducing total development lifecycles by sharing codebase logic across iOS and Android. - Migrated legacy codebases to layered Clean Architecture and MVVM/MVI design patterns, drastically boosting state management reliability and testability. - Optimized application runtime performance and load times by implementing asynchronous pipelines using Kotlin Coroutines and Flow, significantly lowering production crash rates. - Designed cloud infrastructure architectures on GCP and AWS, structuring secure data flow matrices, API security compliance, and automated hosting. - Spearheaded DevOps automation by writing CircleCI and GitHub Actions pipelines, driving deployment release frequency up from a biweekly schedule to automated weekly production builds.

- Collaborated inside a distributed international engineering team (iOS, Backend, Embedded IoT) to build hardware configuration and firmware update features via CoreBluetooth/BLE. - Engineered a Multi-Module Architecture from scratch to decouple app features, eliminating code duplication and accelerating new feature implementation speeds. - Wrote and maintained a strict testing suite consisting of 200+ unit tests via JUnit and Mockito, ensuring high test coverage across core business logic modules. - Integrated KMM modules to safely share business logic components between the client's native Android and iOS ecosystems.

- Developed a real-time inspection, non-conformity reporting, and automated dashboard reporting engine for enterprise audit clients using MVP, SQLite, and Retrofit. - Engineered secure remote consultation video/voice calling and instant messaging integrations for an E-health application using Twilio services. - Optimized layout rendering, network caching profiles, and overall application memory usage to maximize customer retention across legacy hardware devices.