site improvements on the framework, yii2

Necessary site improvements on the framework, yii2 version 2.0.12.2. compliance with all accepted standards.
Current tasks:
1. Translate site to a new domain
2. To make up 3 new pages (design is ready) and implement them in the current site
3. Implementation of new functionality (global improvement)

You are required to:
1. Good knowledge of this engine. Coding without crutches.
2. Efficiency (with us fast payment)

The value set from the bulldozer – will consider your suggestions.
I understand that you need to evaluate the site. Ready to throw off data when interest in the task.