From Hedge Engine to a Reliable State Engine
How hedge engine reliability exposed the need for a controllable deterministic state engine.
Stories
Building StateVec, one engineering decision at a time.
Long-form notes on why StateVec exists, where common engine patterns hit their limits, and how exchange-style workloads shaped identity and indexes.
Where the Common Service Pattern Hits Its Limit
What the standard service pattern gives you, and where it strains under critical state.
The Hard Part of a Matching Engine Is Consistent State
Why exchange-grade matching engines are hard because of stable, recoverable consistency, not only raw performance.
When Publication Became a Projector
How a SQL record-delta explorer led to readonly projectors, verified publication, and a cleaner effect boundary.
SysId, UK, and Indexes: The Exchange Test Case
How a trading exchange test case shaped the design of identity, uniqueness, and prefix indexes.