The path to becoming a NeurIPS reviewer has always seemed straightforward: publish at a top conference, build a reputation, wait for an invitation. But this student's experience, receiving a reviewer offer without a single NeurIPS, ICML, or ICLR publication, suggests the system is more flexible than most assume. Our take is simple: if you are waiting for an official application portal, you are likely missing the point. The process is not a form you fill out; it is a network you build into.
This matters because it changes how you should think about your own career trajectory in machine learning. The student in question had submitted to journals, not flagship conferences, yet still earned a reviewer slot. That tells us the community values demonstrated competence over brand-name venues. Someone on the program committee must have known their work, recognized its quality, and nominated them. The practical takeaway is that your energy is better spent on producing solid research and sharing it, through preprints, workshops, or thoughtful peer reviews, than on hunting for a formal application link that does not exist.
The original question about where to apply reveals a common misunderstanding. Conferences like NeurIPS do not run open calls for reviewers in the way that job boards do. Selection happens through a combination of past publication history, program committee recommendations, and direct outreach from area chairs. If you have never received an invitation, the gap is rarely a bureaucratic one. It is a visibility gap. You can close that gap by engaging with the community: review for smaller venues, volunteer as a meta-reviewer, or contribute to open-source evaluation efforts. Each of those actions puts your name in front of people who later make reviewer assignments.
What this means for you in concrete terms: stop waiting for an email that may never come. Instead, identify one workshop or journal you respect, offer to review for it, and do the work thoroughly. Write reviews that are specific, constructive, and fair. Those reviews become your portfolio. When the next NeurIPS cycle begins, the people who remember your name will be the ones deciding who gets invited. That is how the system actually works, and it is a path open to anyone willing to start building it.