Certifications can positively influence the hiring of ASP.NET developers by showing that a candidate has a solid understanding of the technology and has invested time in building their skills. While not always a deal-breaker, certifications like Microsoft Certified: ASP.NET Core Developer or similar add credibility, especially for junior or mid-level developers. For employers, it’s a quick way to gauge technical knowledge, though real-world experience and project work often carry more weight in the final decision.