Much of modern development involves memorizing non-fundamental, framework-specific commands. AI agents excel at handling this "wasted knowledge," allowing developers to offload the cognitive burden of recalling specific syntax and instead focus on the fundamental logic and architecture of the application.

AI tools are commoditizing the act of writing code (software development). The durable skill and key differentiator is now software engineering: architecting systems, creating great user experiences, and applying taste. Building something people want to use is the new challenge.

As AI agents handle the mechanics of code generation, the primary role of a developer is elevated. The new bottlenecks are not typing speed or syntax, but higher-level cognitive tasks: deciding what to build, designing system architecture, and curating the AI's work.

Contrary to the belief that AI levels the playing field, senior engineers extract more value from it. They leverage their experience to guide the AI, critically review its output as they would a junior hire's code, and correct its mistakes. This allows them to accelerate their workflow without blindly shipping low-quality code.

The traditional, decades-long path to becoming a senior engineer is no longer practical. Aspiring engineers should instead focus on mastering AI coding assistants. You can be highly effective by learning how to prompt, guide, and debug AI-generated code, bypassing the need for deep foundational knowledge.

While junior engineers quickly become AI power users, Glean sees that many productive senior engineers haven't adopted code-gen tools as heavily. Their core value lies in complex tasks like debugging, design, and troubleshooting—areas where current AI provides less leverage than in writing new code.

Technical executives who stopped coding due to time constraints and the cognitive overhead of modern frameworks are now actively contributing to their codebases again. AI agents handle the boilerplate and syntax, allowing them to focus on logic and product features, often working asynchronously between meetings.

AI coding tools are a massive force multiplier for senior engineers, acting like a team of capable-but-naive graduates. The engineer's role shifts to high-level architecture and course-correction, enabling them to build, ship, and maintain entire products without hiring a team.

The traditional definition of a developer, centered on mastering programming languages, is becoming obsolete. As AI agents handle code generation, the most valuable skills are now clarity of thought, understanding user needs, and designing robust systems, opening the field to new personas.