AI BriefingRakuten Doubles Incident Recovery Speed by Adopting Codex
Key point
Rakuten adopted OpenAI's **Codex** to cut mean time to recovery (MTTR) by 50% and boost project build speed by up to 4x.
Details
Global innovation company Rakuten has adopted OpenAI's coding agent Codex across its software development and operations to maximize engineering efficiency. Rakuten leverages Codex according to three core priorities: speed, safety, and autonomy.
First, Rakuten cut mean time to recovery (MTTR) by about 50%. Engineers combined Codex with monitoring workflows based on KQL (Azure's log and telemetry query system) to quickly identify root causes and receive suggested fixes when incidents occur, doubling recovery speed.
Second, Rakuten integrated Codex into its CI/CD pipeline to strengthen security and quality. Codex has learned Rakuten's internal coding standards and automatically performs code reviews and vulnerability checks. This has built guardrails that ensure safe deployment while increasing development speed.
Finally, Rakuten is pursuing "AI-nization" to increase project autonomy. By carrying out projects from ambiguous specifications all the way to actual implementation, Codex has shortened work that previously took quarters down to weeks, improving build speed by up to 3-4x.
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