I will code review your Ruby, Rails or JavaScript

Please note that code you provide must already be working. I do provide advice on developing new functionality or fixing existing bugs. I've have 10 years experience of working professionally as a developer. There is no limit on how much code you can provide me, but I will adapt my effort accordingly. If you give me a small piece of code, my advice can be deep and a specific. If you give me a large amount of code, my review will be more general. I can check areas such as coding style, object-oriented design, testing, security, performance, and scalability. I will provide my report as a document with specific advice. It will be around 500 words long. I will also provide links to relevant resources for further reading.