Full stack web developer

We're building a platfrom for automated online intreviews.
The web application provisons intreviews desinged by the employer thru their account access. Then, the employer can watch the recorded videos of candadites at their convenient time.
The system will show the questions one at a time to candidates and give them 30 seconds to think before they should start the recoding and ansering the question.
After the session of multiple questions, the invireview is finished.
The recoded videos will be aggregated and saved, and appear on the emplyer's account.