Why it matters
Security bolted onto finished code is far more expensive to fix than security built into the process.
How a self-led small team implements it
Add security review as a stated stage in whatever dev process you already run — don't build a parallel SDLC.
What auditors expect to see
Development process documentation showing a security stage.
Track A.8.25 in your own Statement of Applicability — mark it applicable, log your justification, and link it to the risk that drove it.
Start your ISMS