If you want to code extra hard then pick up side projects and improve your life. Doing extra work for your employer won't do anything for you beyond raising exp

If you want to code extra hard then pick up side projects and improve your life. Doing extra work for your employer won't do anything for you beyond raising expectations for you to do more work and thus an elevated standard by which you will be judged. You're not getting a raise worth worrying about by going above and beyond. Be present, helpful, and do the target and nothing more.