Flutter JavaScript Developer MusicXML MIDI Sync Expert

📌 Job Title Flutter + JavaScript Developer (OSMD / MusicXML / MIDI Sync Expert) 🧩 Project Overview We are building a piano learning application that combines two synchronized views: 🎹 Falling Notes View (MIDI-based playback & visualization) 🎼 Sheet Music View (rendered using MusicXML via OpenSheetMusicDisplay) Our goal is to provide a smooth, professional learning experience where visual playback and sheet music are perfectly aligned. ⚠️ Current Challenge We are facing a synchronization issue: The sheet music cursor (OSMD cursor) is not accurately aligned with the actual note playback. Timing drift occurs between: MIDI playback (falling notes) OSMD-rendered sheet music cursor This leads to incorrect visual guidance for learners. We will provide a sample issue video (e.g., “Fur Elise”) to demonstrate the problem. 🎯 What We Need We are looking for a highly skilled developer who can: Diagnose and fix timing synchronization issues between: MIDI playback engine OSMD cursor positioning Ensure frame-accurate or near real-time sync Improve overall playback consistency and responsiveness 🛠 Required Skills Strong experience with: JavaScript / TypeScript Flutter (Dart) Hands-on experience with: OpenSheetMusicDisplay (OSMD) MusicXML MIDI parsing / playback Understanding of: Musical timing (ticks, tempo, measures, beats) Event scheduling / animation timing Debugging complex UI + audio sync issues ⭐️ Nice to Have (Big Bonus) Deep understanding of music notation (timing, ties, grace notes, tempo changes) Experience with: VexFlow Web Audio API Real-time rendering systems Prior work on music education apps 📦 Deliverables Accurate synchronization between: MIDI playback Falling notes OSMD cursor Clean, maintainable solution Documentation or explanation of the fix 💬 Additional Notes This is a non-trivial sync problem, so we’re looking for someone who can think beyond basic implementations. If you’ve solved similar issues before, please include examples. 📎 To Apply Please include: Relevant experience (OSMD / MIDI / music apps) Links to past work (if any) Brief explanation of how you would approach this problem