Def Method

Def Method is a software engineering firm that helps organisations modernise complex software systems where mistakes are costly. It uses an assessment-first approach, focused on understanding risk before making changes, and its team works fully on-shore.

What Def Method offers

• System assessments — identifying where change is most likely to create operational, compliance or revenue risk.
• Legacy modernisation — updating complex Rails and other systems for AI-assisted development.
• Agile software development — building software with a test-centred, iterative approach.
• Engineering and product consulting — combining engineering, product management and design expertise.

Who it works with

It has worked with organisations including Orum, Paxos and Citi, and with GameChanger. Case studies cover revenue-critical reporting and derivatives pricing systems.

Key facts

• Team: fully on-shore
• Main framework: Rails