Retool / Javascript data visualisation expert needed

We have a complex pricing dashboard in retool that needs some rework, we have the specifications from our client along with a working dashboard today with API, endpoints and javascript transformations, we need the dashboard reset into a new set of requirements. Unfortunately our existing engineer is unwell and we need someone to step in, we estimate it would take our existing engineer 5-8 hours to complete this, so we expect a new engineer to deliver this in 10-16 hours as there is a learning curve etc. this is a fixed fee with payment upon completion of the specifications, there will be 1x interview and the work must be completed by 15th June PM UK time