JapanTechnology and telecom2025 – ongoing

DeNA

Company-wide rollout of the Devin AI software engineer

DeNA put Devin in front of about 2,000 employees and reported a legacy API migration finished in about a month

WorkingCompany's own claim

Problem

DeNA had legacy code and long manual checks in its development work. It wanted to find out whether an autonomous AI engineer could shorten them.

Approach

DeNA formed a strategic tie with Devin's maker Cognition AI in July 2025. It ran a staged rollout over about half a year: technical checks by core members, a beta close to real projects, then company-wide release. Devin Enterprise became available to about 2,000 staff on 4 March 2026, and more than 40 teams had started using it.

Results

6倍work efficiency gain in the headline, as reported from DeNA's announcement; the basis was not statedCompany's own claim[1]

2倍development speed of a new mobile app, per DeNA as reported by ITmediaCompany's own claim[1]

10分の1at most one-tenth of the previous time for specification checks, per DeNA as reported by ITmediaCompany's own claim[1]

Takeaway

DeNA reported gains on several tasks, but the figures are its own and come from different tasks, so they do not add up to one number.

Sources

DeNA、「Devin」を全社2000人超に導入「作業効率6倍」でレガシーコードを刷新
ITmedia16 Mar 2026News article

Source summaries

[1]ITmedia16 Mar 2026

ITmedia reported DeNA's announcement of a company-wide Devin Enterprise rollout to about 2,000 staff after a roughly six-month staged trial. It said more than 40 teams were using it and gave company figures such as 2x speed on a new app, one-tenth spec-check time, and a migration of an internal asset-management API from Perl to Go.

Full details are in the original sources.

Added 2 Nov 2026 · Updated 2 Nov 2026