I feel like I achieved almost everything I wanted as a frontend developer (even moved from just working with UI/react/etc to pure R&D, researching and working with browser api for innovarive/obscure tasks) and while backend looks interesting for me, I know that I will have to take a paycut if I would move there.
Becoming a team leader or moving to other management position looks more promising from salary and work enjoyment (for me) purposes, so what are my next steps are?
Is there any good reads, courses, videos, lectures etc I should know of? I work in small startup for the past year so I don't have anything to take example of nor I have any opportunity to lead a team (except one guy I'm mentoring)
For me, what has worked CONSISTENTLY are 3 things:
1. Take initiative: I can't stress this enough. If you act like a team lead, people will recognize you. And if they don't, you should consider whether this is somewhere you want to be. An organization that doesn't help build its talent, is not one where you will accomplish your personal growth objectives.
2. Speak to your Manager: Assuming you are doing #1, make sure that your manager(s) are aware of your career goals. You need to get "buyin" from others in the organization that are able to carve out this kind of role for you. They will also have good advice for you. Not every manager/team lead role is the same, so YMMV in this regard. It may be that there's a bigger need for a people manager vs a technical manager.
3. Stay at a company for 3+ years: The number might be different, but in my experience this is the point, after which you have been around enough time to have been involved in many different projects. Not only will you know a lot of the tech stack and it's limitations, you will also understand MUCH of the business itself. You'll have positioned yourself at the intersection of the business and the technology, and become an indispensable part of the organization.
One of the companies I worked at was a personal finance startup, and over the years I learned so much about saving, spending, credit, loans, income and investing IN ADDITION TO the technology we were building and everything that was powering it, that I was asked to be a part of nearly every discussion.