Algorithm Engineer

iOS Algorithm Engineer (CoreMotion / Physics) We are a sports technology startup building an Apple Watch app for sports training. We have a functioning app that records raw accelerometer and gyroscope data. We need a specialist in Signal Processing and CoreMotion to help us tune the algorithm. Engagement Type: Short-Term Contract / Moonlighting Friendly Time Commitment: Estimated ~10-15 hours total. Schedule: Flexible. This work can be completed on evenings or weekends. We focus on the deliverable (the algorithm), not the hours. Location: 100% Remote. The Mission: We are tracking a specific arm movement (throws). We have the raw data logs (CSV). Your job is to analyze this data and provide the logic/code to: Accurately count "Reps" (Throws). Distinguish between a real throw and "Noise" (e.g., dropping the arm, walking, picking up a ball). Handle the drift/noise inherent in MEMS sensors. What We Have: Existing WatchOS app that logs data (User Acceleration, Rotation Rate, Gravity) at 50-100Hz. Dataset of "Clean Throws" vs. "Noise" (CSV format). A lead iOS engineer (Swift) ready to implement your logic. What We Need From You: The Algorithm: You don't need to build the UI. We need the mathematical logic (or Python/Swift function) that takes the raw inputs and returns a "Success" count. Drift Correction: Experience using Complementary Filters, Kalman Filters, or Sensor Fusion to clean up the data. Requirements: Deep experience with Apple's CoreMotion framework. Strong background in Vector Math and Physics. Experience with Human Activity Recognition (HAR) or Gesture Recognition. Ability to work fast This project focuses on generic signal processing math (physics/vectors) and does not require using proprietary IP from your current employer. We are happy to sign a customized IP agreement to ensure you are protected. Skills Algorithm Development watchOS Swift (Programming Language) Core ML Signal Processing Mathematics

Created: 2026-04-02