Closed an object-reference flaw and added authz tests; the pen-test re-run came back clean.
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A dependency deep in the stack carried a known vulnerability and we had no fast way to even tell where it was used. I built the inventory and the update path, then closed the loop, so the next disclosure was a patch rather than a fire drill.
Closed an object-reference flaw and added authz tests; the pen-test re-run came back clean.
The build was green but the product still broke in ways the tests never covered, because they checked what was easy rather than what mattered. I refocused the suite on the paths that actually carried risk and deleted the ceremony, so a passing build meant something again.
Quarantined and rewrote flaky suites; CI green rate went from 35% to 52%.
The protocol handled real value, so a bug meant someone's money rather than a rollback and an apology. I designed for safety first — narrow interfaces, invariants written down and enforced, and an audit trail that made the failure modes something we could reason about.
Reworked the sleep/wake cycle and IO; measured power draw dropped 20%.
Cut complexity until what's left is obvious — then ship it.
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Practical bits
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