Modify existing Yii2.0 software with existing + new functionality

We have existing test-based software for which you need to modify a part of it as per new specifications. You need to be good in Yii 2.0 as the entire software is coded in it. Along with, you must be good at: 1) Handling web speech API (Google free API’s to convert text to speech) 2) Using existing Yii code 3) Creating/handling mp3/wav files (student’s recordings) 4) Communication with our team Our main developer is facing health issues and will be limitedly available to support. The project needs to be delivered in the next 10-12 days, and there can be a bonus at the end and long term relationship. We should be available daily for the next 10 days and show us daily progress. More details will be shared to give you idea of what to make, but don’t bid if you can’t deliver/available for the next 10 days. You also need to coordinate with our second developer to transfer the logic/code to another instance. We will prefer to work with individuals. Don’t bid: 1) If not going to work directly on the project. 2) Can’t deliver in next 10-12 calendar days 3) Can’t accept payment after delivery. We will escrow 100% but will release on successful completion.