Ensar Sarajčić

Working on open source projects and providing software development services as a freelancer.

Projects:

• Simple Mobile Tools: Worked as a paid contributor to SimpleMobileTools suite of open source Android applications. Made contributions to all applications in the suite in the form of new features, improvements and refactoring and updating the application to newest Android standards. Continued to contribute privately to new FOSS fork named Fossify, since the original suite of applications was sold off.
• VoIP project with Povio: Helped with stability improvements for a VoIP application with Povio. Reduced crash rate, user complaints and improved log and error data collection process.
• Vector.dev contributor
• contracts on Upwork

Worked as a Java Developer in an AI startup, doing research and development, on both internal closed source project and open source projects.

Part of a core application team, guiding Android application architecture and helping establish common practices and patterns, as well as developing common functionalities.

Using free time to work on open source projects.

Worked on Android application with video and audio conferencing features, involved in planning and organizing future work and mentoring new team members.

Worked on:

• development of .NET microservices of an enterprise scale application
• migration from legacy monolithic applications to microservices developed in both Java and .NET
• leading a team developing Python Flask backend application processing large data sets collected via scraping and REST APIs

Worked on:

• migrating a large Android application to Kotlin, rewriting bluetooth library to Kotlin
• developing a different Android application and guiding development of an iOS application, integrating with bluetooth beacons
• leading a team developing Spring application, as well as Android and iOS SDKs providing integration with digital identity verification
• leading development of a Python Flask backend application processing large data sets collected via scraping and REST APIs
• prototyping advanced features for Android application, including analysis using AI

Worked on in-house white-label projects. Worked on completely setting up and starting two separate projects, featuring full offline support, video playback and bluetooth beacons integration.

Worked in a big agile team on an Android application integrating with REST API, as well as with an IoT device using BLE and utilizing both REST API and BLE to communicate with device. For purpose of the project, complete BLE library was developed and used on two different applications. Besides developing application, also acted as Android development team lead on the project, involved in planning and organizing future work.

First encounter with Android development and first real project. Worked in a small agile team on Android application which besides the REST API communication was utilizing bluetooth beacons for presence detection.