Vasilis – Kotlin, AI-assisted coding, Android

A ticketing platform for buses and trains built for backend, iOS, Android and Web with a shared codebase.

• Led the development from scratch of Interbus for both backend and frontend.
• Built the platform using Kotlin Multiplatform technology.
• Used a shared codebase to target backend, iOS, Android and Web.

An upcoming ride hailing app.

• Led the refactoring of Karoot from a legacy project to a modern well structured architecture.
• Acted as team leader and core developer during the rewrite.

A white labeled multimodule app intended to replace multiple similar existing apps for a very large user base.

• Created a white labeled multimodule app from scratch.
• Replaced multiple similar existing apps owned by the same company.

A reservations platform designed for gyms. It allows gym members to book classes and participate in online training sessions via the app, while also giving gym owners a way to manage all aspects of their gym. Together, the three apps cover the full range of needs for both customers and gym owners.

• Led the Android development for all 3 apps offered by the company since its founding, and led the entire software team since 2023.
• Coordinated backend-frontend cooperation and made architectural-engineering decisions.
• Created and implemented the Android projects architecture.

An app used by supermarket employees to manage product stock and orders across thousands of stores.

• Engineered core features of the product stock management app.
• Developed an app used by supermarket employees to manage product stock and orders.

A market leader in premium services for truck and car fleets. The app allows users to plan long trips while factoring in refueling and recharging stations, and offers a loyalty point system for payments made using the company's fleet cards.

• Was one of 5 Android engineers on the team.
• Implemented a map filtering algorithm based on user preferences and zoom level that fetches gas/charging prices and renders them on a map.
• Improved the user preferences filtering system and added new features.