We build an AI movement analysis platform that extracts real performance data from smartphone video in real time. Our dataset spans 82,000 users across 190 countries, trained on real-world conditions, not labs. We are launching three product tracks in August 2026 and need a back-end engineer who can hold infrastructure together under real delivery pressure.

What you will own:

· The shared back-end infrastructure supporting our mobile app (B2C), our B2B solution, and the AI/ML layer

· Database design and performance as we scale across product tracks

· Authentication, API architecture, and the connections between front end, back end, and ML systems

· Reliability and maintainability: you will be one of two back-end engineers, so your work has direct impact

What we are looking for:

· 3–6 years back-end experience, with at least 2 years on mobile app back ends

· Strong foundations in API design, database modelling, and authentication

· Experience working alongside ML/AI teams

· Someone who communicates clearly, flags blockers early, and takes ownership

Nice to have:

· Experience with sports tech, health tech, or real-time data applications

· Startup experience: you know what it means to ship under pressure

What we offer:

· Direct impact: you will be close to product decisions, not buried in documents

· A technical team that uses modern tooling (Claude, Cursor, and our own AI layer)

· Hybrid setup in Braga with flexibility

· Competitive salary for the right profile

· Possibility of stock options as we grow

Salary range: 2,000 – 4,000

Stack: to be confirmed during the process. We will be upfront on the first call.