Jonatan Reiners
Architecture, the commercial mechanics underneath it, and how the work actually gets delivered — grounded in numbers I've worked, not waved at a slide.
Lift-and-shift the VDI estate. Don't replatform it.
A 2,400-seat estate, the full cost build-up, and the one case where replatforming actually earns its keep.
MAP funding, decoded: the formulas no one shows the SA
How the assess / mobilize / migrate credits actually compound — and the ~18% that quietly leaks out between phases.
Graviton cut the compute line 38%. Here's the part nobody mentions.
The migration was a weekend. The benchmark caveats — and the 38% that wasn't free — were the real work.
Where the architecture meets the SoW
Effort estimation when technical reality collides with a fixed price — and how I stop the gap from becoming my problem.
I scoped a fixed-price migration with Claude in the loop
Field notes: what it got right, where it padded the estimate by 1.4×, and the one prompt that fixed the number.
Sub-50ms on MSK: the broker tuning that moved the needle
Six knobs. Two mattered. Real p99: 141ms → 47ms, and why the other four were theatre.
Stop estimating migrations in story points. Estimate in dollars.
Story points hide the commercial risk. Here's the one-page estimate format I hand a deal team instead.
Fargate or Bottlerocket? A cost-and-ops call, not a religion.
The decision matrix I actually use, with the break-even at ~120 tasks where the math flips.