In recent years, artificial intelligence has dramatically reshaped the landscape of software development by democratizing the coding process. This evolution has been largely driven by “vibe coding,” a novel method allowing individuals without traditional technical backgrounds to create functional code through interaction with AI systems. This paradigm shift has not only made programming more accessible but has also sparked a conversation about the broader implications for the industry.

Despite the benefits, the increased accessibility brought by AI has introduced new security challenges. Joe Sullivan, a seasoned expert who has served as the chief security officer at notable companies like Cloudflare, Facebook, and Uber, emphasizes that application security has become a pressing issue. Over the past two decades, the pace of development has surged, resulting in large volumes of code being deployed without thorough scrutiny. This rapid deployment raises questions about the safety and durability of the software being produced.

Sullivan highlights the accelerated nature of the development process, noting that AI allows projects to move from concept to live product faster than ever before. This speed, while advantageous in many respects, necessitates a reevaluation of existing security protocols to ensure that new software is both safe and reliable. As AI continues to play a larger role in development, the task of maintaining robust application security becomes increasingly complex.

Speaking at Nullcon Berlin 2025, Sullivan elaborated on the shifting roles within security teams due to AI’s influence. By automating mundane tasks, AI allows security professionals to focus on more strategic elements of their roles. This shift has fueled a growing demand for application security engineers across various sectors. Sullivan also stressed the importance for security experts to adopt a builder mindset, urging them to embrace the changes AI brings to their field.

With a background as a federal prosecutor and extensive experience in executive roles, Sullivan brings a unique perspective to the conversation around AI and security. His career, including the co-founding of the Computer Hacking and Intellectual Property Unit at the U.S. Department of Justice, informs his insights on the evolving landscape of software development and the critical role of security in this new era.