Founder mentor for one-on-one calls (native Serbian)

Students at Startup Akademija can ask for a call when they are stuck on their own startup. We are looking for people who have built something real to take those calls. This is an ongoing part-time role. A student sends a topic and possible times, you confirm, you read their notes, and you hold a focused video call. You ask hard questions rather than write their plan for them, and you never promise investment or success. Deliverable per call: the call held, plus three lines on what was decided and the next step. Done well means the student leaves with one clear action and comes back with evidence. Must know (mandatory): native Serbian; founder or early-employee experience in a startup; customer discovery and validating ideas; Zoom or Google Meet. Nice to have: mentoring at an accelerator; marketing or B2B sales; AI product development.