TASKS Within this position your focus will be on app development ranging from new feature development to continuous usability optimisations for our existing mobile apps: Fitrockr Hub: this app allows pairing and data synchronization of Garmin wearables with the Fitrockr Health Solutions platform. Fitrockr Fitness Challenges: this app allows pairing and data synchronization of various fitness wearables to participate in online fitness challenges. REQUIREMENTS Must have skills: Swift-based iOS development experience REST-based backend communication experience English or German language skills Work eligibility in Germany or student registered at a German university Optional skills: Use of external SDKs BENEFITS Work on and improve an innovative product in the health technology space. Flexible working times. Decide yourself when and where to work. 100% remote work, no need to travel to an office. Liaise and work together directly with the company founders. €15 / hour