Despite the recruiter's claims, it seems Immunefi's true aim is to find a full-stack developer with system design expertise who fits within their senior role budget.
This was a common tactic during that period of limited hiring. The initial online test, with its focus on specific technologies like Next.js (a very specific, outdated version), TS and Node.js, creates an impersonal experience, filtering out talented candidates who might lack knowledge of specific tools/versions of those tools but possess strong conceptual understanding.
This approach highlights a potential immaturity in the company's hiring process, potentially causing them to overlook valuable talent based on minor details.