Working Student – Quality & Data (m/f/d)

About JawBuddy JawBuddy helps people with jaw pain, teeth grinding and TMJ problems through a guided exercise app. Our app measures jaw movement through the phone camera using computer vision and AR, so users see their progress in real numbers. We are a small, funded health-tech team with paying customers in Germany. Next up: a B2B platform release in early 2027. The role You make sure our app and our numbers can be trusted, and you use AI to do it at a scale one person couldn't before. AI handles the repetitive checks; you handle what needs human judgment, like testing our camera features in the real world. • You work directly with our CTO and founding engineer (~12h) • Data quality (~5h) • Automation with AI (~3h) What you'll do • Test our computer vision in the real world • Test camera-based jaw tracking across devices, lighting, faces, glasses and beards • Find the conditions where measurements break, and help the team fix them • Own app quality • Own the release checklist for every iOS and Android build • Test accessibility, German texts, performance, slow networks and offline use • Write clear bug reports in Linear, with steps to reproduce and evidence • Keep test evidence documented, as our product requires • Keep our data trustworthy • Review the daily data-quality checks across Amplitude, AppsFlyer, RevenueCat and BigQuery, and investigate what they flag • Find out why two tools disagree, and get it fixed • Keep our tracking plan in sync with what the app actually sends • Automate with AI • Use AI tools to write automated tests (Maestro), generate test cases and run checks • Review what AI produces: you are the person who decides whether it is right What you bring • Enrolled student, available 15–20 hours a week for at least 12 months • Fluent in English (the app is in German; the team works in English) • Solid SQL • A structured, curious way of testing: you find the edge cases others miss • You already use AI tools (Claude, ChatGPT, Cursor or similar) in your daily work Nice to have • Test automation (Maestro, Detox, Appium) • Accessibility (WCAG, VoiceOver, TalkBack) • Product analytics (Amplitude, Mixpanel, GA4) or attribution (AppsFlyer) • dbt or Dataform, Git, Python • Interest in computer vision, health tech or medical device quality What we offer • Real ownership • You own the release checklist, and when you say a build isn't ready, we listen. • Work with AI from day one • You learn how to run quality at scale with AI, a skill few people have yet. • Rare experience • Computer vision, health data and quality in a health product, all in one role. • A path to full-time • After graduation, this role can grow into a Junior QA Engineer or Data Analyst position. • Mentorship • A weekly 1:1 with our CTO. • Fair pay • And hours that fit around your lectures and exams. How we hire • Send your CV. • A 30-minute call with our CTO. • A short paid trial: we send you a test build of the app, and you spend about 2 hours finding and reporting what's wrong. Use any AI tools you like. • A final conversation, and an offer within a week. Find Jobs in Germany on Arbeitnow