As a colleague (in a team of 8 seniors, each with 15-20+ years of experience) your work will be around reducing toil and building and supporting the automation and processes that enable us to reach 200 million users.
We have hundreds of builds running every day for over 1000 GitHub repositories (many open source) with languages like C++, Rust, Go, Python, JavaScript, Ruby, Kotlin, Bash/Shell, HCL and many more.
We ship fast and on multiple desktop and mobile platforms, architectures and distribution channels. Multiple CI systems and acceleration/optimization techniques are used to build the right thing and the thing right.
Our processes are light and we have no mandatory weekly meetings, 0 on-call, no need to be in an office (unless you really want to) and no strict core hours. Work is autonomous (collaborative at times), asynchronous, flexible.