Endava has transformed into an agentic organization by adopting Codex, allowing small teams to deliver massive value in condensed timeframes. Joe Dunleavy, regional CTO, reports quality has "gone up exponentially" as they moved from producing code to overseeing Codex-generated work.

Codex changes how senior and junior engineers collaborate. Senior architects articulate requirements that become accessible information for junior developers. Junior team members can now produce senior-level outputs, with Codex guiding best practices and architectural decisions normally reserved for experienced engineers.

The time compression benefits are substantial. What previously took weeks of analysis and design now happens as a unified process. In one case, reviewing thousands of contract pages was reduced from weeks to two one-hour meetings, producing a usable specification. Teams now generate documentation live in client sessions, accelerating communication.

Endava's key lessons: codify senior expertise, treat Codex as a desktop agent across the entire workflow, and start with non-coding tasks. The approach magnifies every skill level while maintaining quality output.