One week with no response is normal, not a red flag. Send a short second note that restates your interest, asks whether there is an update on timeline, and adds one piece of fresh context: a relevant article, a brief project update, or a thought connected to something raised in the interview.
Lead with what's new, not with the nudge. "Still very interested in the [Role] position. I noticed [Company] announced [recent news] this week and it reinforced why I want to be part of this team" works because it gives the interviewer a real reason to reply. "I wanted to check in to see if there are any updates" does not.
Hunter's State of Email Outreach shows that adding just one additional follow-up after the initial message nearly doubles total replies (+106%). Two follow-ups beyond the initial thank-you is a reasonable limit. After that, the timeline is outside your control.
If the reply comes back as "we're still deciding," a short reply confirming your continued interest is enough: "Thanks for the update. I'm still very interested and happy to answer any other questions as you work through the decision." Keep it brief.
If you have a competing offer with a deadline, say so directly. "I've received another offer with a decision deadline of [Date] and want to make sure I have the full picture before I respond." That's not pressure; it's information they need. Most hiring teams will fast-track a decision or at least tell you honestly where you stand.