Telecommunications|Product Engineering|Increase Efficiency

BT GroupSoftware development

Manual testing held back legacy updates. AI now writes 2M+ lines of code annually, automating routine tasks and complex upgrades.

Sep 17, 2025|4 months ago

Key results

Annual Code Lines
2M+
vs 2.5-3M human-written lines
Acceptance Rate
2x

The company

BT Group logo

BT Group

bt.com

Telecommunications and network services for UK and global markets.

IndustryTelecommunications
LocationLondon, England, United Kingdom
Employees50K-100K
Founded1846

Result highlights

  • 2M+ lines of code generated annually
  • 2x code acceptance rate with chat

The story

One of the United Kingdom's largest telecommunications providers, operating critical fixed and mobile networks where software permeates every product line.

Developers lost significant time manually searching for best practices and writing repetitive test code, causing critical legacy updates to fall by the wayside. The organization needed to accelerate development and maintain rigorous engineering standards without increasing headcount.

The company implemented Amazon Q Developer through a tailored adoption strategy that included hackathons and internal champions to drive engagement across business units. Developers use the system to generate unit tests, retrieve technical answers via chat, and automatically upgrade legacy code versions. The tool integrates into development workflows to handle routine coding tasks, allowing junior developers to manage complex issues earlier.

Scope & timeline

  • 2,000 active developers using AI

Quotes

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