YouNeed is a real-time communication app designed to connect users through messaging, voice, and video calls. The focus of the application was to provide a smooth and reliable communication experience, even in scenarios with varying network conditions.
On the technical side, the app was built using UIKit for clean and responsive user interfaces. Networking was handled through a custom URLSession wrapper, giving better control over requests, error handling, and performance. Core Data was used as the main persistence layer to support local caching and offline access.
Real-time messaging and updates were implemented using a WebSocket wrapper built on Starscream, enabling low- latency, two-way communication. WebRTC was used to power high-quality video calls, while SIP handled audio call signaling.

Compassana is a secure, patient-centric healthcare iOS app that gives users streamlined digital access to Switzerland’s complex healthcare ecosystem, empowering them to manage medications, store health documents, book appointments, communicate securely with providers, and track treatment paths across care teams and insurers. I led development of core iOS functionality using modern Swift patterns, ensuring seamless handling of sensitive health data, secure authentication flows, and intuitive navigation across multiple healthcare management features. This work enhanced data privacy compliance, improved overall user engagement with health workflows, and contributed to a reliable, integrated mobile experience for patients navigating fragmented care systems.

BVG Fahrinfo is the official mobile application for Berlin’s public transit system, providing users with route planning, real-time schedules, and integrated digital ticketing for buses, trams, U-Bahn, S-Bahn, and regional trains. I led the ticketing module within a modular architecture, owning design and implementation of secure ticket purchase flows, SwiftUI-based interfaces, and robust backend integrations. This work delivered a modern and maintainable codebase with secure payment processing (including SEPA) and OpenID-based user authentication, improving transaction reliability, UX consistency, and long-term scalability of the app.

Baboon Delivery is an on-demand food and courier delivery platform providing users with real-time order tracking and location-based services. I owned core iOS features including live delivery tracking, map integrations, and real-time updates using background location services. My work improved tracking accuracy, network resilience, and overall app stability in high-traffic scenarios.

Where Are U is an emergency assistance application that allows users to quickly request help in critical situations. The app connects users directly with their local 112 Public Safety Answering Point (PSAP), enabling communication with Public Security Officers, Fire Departments, and Medical Aid services.
By leveraging location awareness, the application helps emergency services accurately identify the user’s area and respond more efficiently during emergencies.

Trek Ride Club is a fitness and cycling app designed to deliver accurate ride tracking, real-time navigation, and enhanced social engagement for riders. I led the development of core iOS features including GPS-based ride recording (CoreLocation), BLE integration with external sensors (CoreBluetooth) for heart rate, cadence, and speed, and map-centric visualization with real-time position and route display. My work enabled reliable turn-by-turn navigation, seamless export of ride data in FIT format for compatibility with external fitness platforms, and social features (likes, comments, following), significantly improving user engagement, accuracy of tracking data, and interoperability with other fitness ecosystems.

Tilt Runner is a 2D iOS game developed in Swift using SpriteKit, designed as a sandbox project to explore advanced mobile game development concepts beyond day-to-day production work.
The game leverages Core Motion to process real-time device motion data (accelerometer/gyroscope) and map it to physics-based ball movement within a SpriteKit scene. Gameplay is driven by SpriteKit’s physics engine, including collision detection, gravity vectors, and dynamic body interactions.