I typically work with a designer or design team, but I am happy to work off of existing brand guide too. Based on the visual input and your goals, I'll build out the desired behaviors, integrations, etc. with the project goals and constraints in mind. When the work is ready, you'll have time to review and approve it. I'm a developer who takes pride in my work. I pay close attention to detail, and I always consider maintainability and future iterations when writing code. This means that my code is easy to read, understand, and modify, which makes it easy for other developers to work on it in the future.

I include documentation on all changes I've made and any instructions needed for an engineer to be able to modify.