Taking over a B2B SaaS that others wrote

Starting point

A B2B platform in logistics was running for paying customers. Others had written it; anyone who wanted to change something had no specification, only the running system and the videos of the first acceptance test.

What we did

First a complete system assessment: dependencies, known vulnerabilities and update needs measured, not estimated, every number with its date and command. We captured the system's behaviour as automated tests, derived from exactly those acceptance videos. Then stabilisation and hardening while the system kept running.

Result

We took the platform over after the assessment and now run it entirely.

What remains

The tests are the specification that was missing before. Any further renewal is done in fixed-price stages, and each stage is signed off against this behaviour.

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