February will be the first full year at this company as full time employee.

I've updated so many legacy projects, optimized a lot of workflows as well as built new tools to improve efficiency and remove unnecessarily duplicate projects (sometimes literally only 3 variables were different between multiple projects)

My one co-worker taught himself enough code to do the job but doesn't think like a programmer though he is asking me for help and advice to improve what he does since ive proven i know a little. my other direct co-worker I'm practically teaching a Programming 100 course to them

My direct manager at one point said he was so happy he took a chance on me even though I didn't interview well

I like my job, I find it so much better than my last job which was horribly toxic, and more fun than my first 'real' job as a night shift help desk for basically a warehouse environment.

But I feel under paid sometimes for how much i do and all ive improved in my first year, I have my first yearly review coming up. I'm hoping to get a decent raise for all ive done and I want to somehow go over everything with the HR person to justify it. But I have no idea how to talk about my dev work to them in a way a non technical person could understand. I'm also not sure how the review process will work. Like will my manager be there. Or is it just me and HR, is there a paper I'll be sent to fill before hand,