"I love web development and it is an important part of my life"
I've many experience(9+ years) of AI projects(using Python, C, C++) and Web Developments(using PHP, Java Script, Html ,Angular JS, React JS, Vue JS, Node JS, Laravel, Wordpress) and loves implementing a general algorithmic approach.
I has 5 years of experience in data science and software engineering. My primary expertise is Python, with production experience in Java and C++. I has applied advanced machine learning techniques such as computer vision, product recommendation systems, network administrating, networking data, and classical data science to solve data-heavy projects.
Software does not work will force you to release money before your test.
He will try to get more money from you all the time.
He does not understand the project and will keep saying that was not in the inicial project, and you need to keep proving that it is. Will try to get you to work outside freelancer.
For him giving support is not resolving problems, he says it try's so that's support. Don't expect him to fix the software.
Don't trust him.