Engineering notes

Why small senior teams still ship production systems

A note on what we keep finding, year after year, about how systems are actually built and what makes them stick around long-term — and the surprisingly small role that headcount plays in either direction.

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Why a small senior team

Most production systems we work on are not complicated for the sake of it. They are complicated because every layer has to be the team that knows the most about its neighbours — and that knowledge is the actual asset.

A small senior team can keep that knowledge live without writing it down. A larger team has to encode it. Encoding it is fine when the encoding is good. It is destructive when it is not.

Practical signals to look for

  • The engineer who wrote the code is still in the room when it breaks.
  • Runbooks are short, dated, and signed.
  • The next person hired knows the why before they know the how.
  • Estimates exist, surprises are tracked, and retros are written.

Senior engineers ship because they take ownership end-to-end. That is the only durable advantage.

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