Quality & Data Intern (mfd) – Mandatory Internship Prácticas

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.

We offer this role in exactly two ways:

• Mandatory internship at an EU university: you are enrolled at a university in the EU and your study regulations require an internship. You send us a document from your university that confirms this. Start as soon as possible.

• Prácticas at a Spanish university: you are enrolled at a university in Spain and the internship runs through your universitys internship agreement (prácticas extracurriculares with a convenio) full-time or alongside your studies. Start from December 2026.

We cant offer working-student contracts voluntary internships or freelance work.

You make sure our app and our numbers can be trusted and you use AI to do it at a scale one person couldnt 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.

• About 60 % app and computer vision quality: real-world testing releases accessibility performance

• About 25 % data quality: making sure analytics data is complete and correct

• About 15 % automation with AI: building automated tests and checks and reviewing what they find

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

• Enrolled at an EU university with a mandatory internship in your study regulations or at a Spanish university that signs a convenio for prácticas

• Available 20 to 40 hours a week remote as your university allows

• 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

• 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

• Compensation: 300 per month

• Real ownership: you own the release checklist and when you say a build isnt 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

• Mentorship: a weekly 1:1 with our CTO

• Hours that fit your studies: 20 to 40 hours a week as your university requires

1. Send your CV and your university document (internship requirement or confirmation that your university can sign a convenio).

2. A 30-minute call with our team.

3. A short trial task: we send you a test build of the app and you spend about 2 hours finding and reporting whats wrong. Use any AI tools you like.

4. A final conversation and an offer within a week.

• Type: mandatory internship (EU university) or prácticas (Spanish university)

• Hours: 2040 per week depending on your university

• Location: remote within the EU

• Compensation: 300 per month

• Start: as soon as possible; prácticas in Spain from December 2026