Client stories
Evidence from the work
Comments reference specific engagements—assessments, incident pattern reviews, capacity sessions, and quarterly checkups.
“They traced our evening lag spike to a single consumer path that retried against a slow warehouse API. The report ranked that fix above the partition changes we had already booked, which saved a wasted sprint. I still wish the first kickoff had been an hour longer—we spent the second day clarifying naming—but the findings were specific enough to act on the same week.”
“We had three outages that looked unrelated on paper. The review showed the same poison-message loop under different alert names. After we added a dead-letter step, the pager quieted on that class of failure.”
“Before a holiday campaign we sat through their capacity sessions and left with a written abort rule. When volume hit early, we paused one producer path on purpose instead of improvising. That alone justified the booking.”
“The quarterly scorecard is short—sometimes shorter than our internal status email—but it catches lag creep we stop noticing because it grows slowly. Last quarter they flagged retry growth on a stream we thought was healthy.”
“I appreciated that they spoke with our on-call rotation, not only the architects. The remediation list named people we could actually assign, which is rarer than it should be.”
Extended note: evening lag on a retail fulfillment stream
A Busan retail logistics platform booked a Throughput & Failure Assessment after three consecutive evenings of lag that cleared only after manual consumer restarts. Internal opinion split between “need more partitions” and “warehouse API is slow.”
During the observation window we paired lag with processing rate and retry counts. Lag climbed while processing flatlined; retries concentrated on one handler calling the warehouse status endpoint. Partition imbalance was present but secondary.
The findings report ranked a timeout and dead-letter change ahead of the partition expansion already scheduled. After that fix shipped, evening restarts stopped for the following four weeks of peak traffic. The team still expanded partitions later for headroom, but as a planned capacity move rather than an emergency response.