zrma — engineer and builder
explore selected workSELECTED WORK / 2026
A project list is not enough.
The work is organized by what grounds each claim: judgment earned in production, or a public system whose behavior can be inspected.
EXPERIENCE-BACKED ESSAYS
Judgment earned in production.
These essays begin with recurring decisions from real systems. Employer details stay private; the tradeoffs, rejected options, and transferable reasoning do not.
- MATCHING SYSTEMSWhat a Matchmaking Score RepresentsFour years of matchmaking work changed what I meant by score: skill was one input alongside wait time, latency, compatibility, composition, preference, and what happened after the match.
- PLATFORM OPERATIONSThe Cluster Looked Healthy by the Time We Could See ItIn an air-gapped on-premises environment, a Kubernetes restart storm had subsided by the time access became available. Reconstructing the missing window mattered more than fixing the cluster that was now in front of us.
- PRODUCT LIFECYCLEWhat It Took to Turn a Research PoC into a ProductThe PoC already worked. Productizing it meant expanding the part of the system we could change repeatedly—then making those changes clear enough for another operator to take over.
PUBLIC SYSTEM CASE STUDIES
Claims that can be inspected.
These pieces use public repositories as executable arguments. They distinguish what the implementation demonstrates from what remains an experiment.
- LOCAL-FIRST SYSTEMRustory: What Local-First Costs Under Partial FailureKeeping shell history local is the easy promise; deletion, offline peers, relay-only paths, and installed-shell behavior are the real design.
- ALGORITHM LABSema: An Executable Reconstruction of Match CompositionA public laboratory for disjoint proposal batches, temporal fairness, deterministic replay, and honest approximation.
- DEVELOPER TOOLINGjjcat: Safety UX for Mutable Version-Control HistoryWhy a Jujutsu desktop client should bind intent to exact repository state before making history mutation convenient.