[cornellwright]

A lot of people recommended practicing coding problems. Along with this, I would add practice talking to people you don't know.

Go to networking events and meet-ups. Offer to give mock interviews to people more junior than you. Have coffee with founders to give them feedback on their ideas. Anything that puts you in unstructured conversation with strangers will make you more comfortable and confident in an interview. You get better at reading people and start to see things from both sides.

Being a software engineer often mainly only requires communicating with a mostly unchanging group of people. Interviewing well requires being able to communicate efficiently with someone you just met. During an interview if you can direct less time and mental energy at just communicating you'll have more for demonstrating that you'll be able to do the job.