Senior Java Engineer · Low-latency systems · New York
I'm a senior Java engineer in New York, working on low-latency trading infrastructure and high-throughput post-trade systems. I spent a decade at Barclays building post-trade platforms for securities settlement and payments, and earlier roles at Credit Suisse, Bank of America, Morgan Stanley, Markit, and Citigroup. I'm currently building NitroJ — an institutional FSI compute platform.
This site is where I write about that work. Posts fall into two categories. Technical notebooks are long-form pieces working through specific engineering problems — deterministic execution, zero-GC Java, lock-free concurrency, mechanical sympathy. Industry notes are shorter pieces about capital markets technology and the parts of the field that don't get written about often enough.
Two ideas run through everything here. Do one thing, and do that one thing perfectly — not out of narrow-mindedness, but as a discipline of finding the true boundary, isolating it, and owning every microsecond of its latency budget. And: question whether the problem needs solving — or just removing.
I also take on a small number of independent consulting engagements through Rüishi Lab.
Multi-venue execution, fee-net venue scoring, and what best execution actually requires.
Deterministic straight-through processing, kernel-bypass networking, and what production-grade actually means.
Mechanical sympathy, CPU cache optimization, and JVM tuning for trading systems.
Rüishi Lab is my independent consulting practice for low-latency systems and capital markets infrastructure — audits, embedded engagements, and advisory retainers. Narrow on purpose.
Institutional HFT matching engine. Zero-GC, lock-free, Aeron-based messaging.
Multi-exchange market data infrastructure. Netty WebSocket clients, SBE and FlatBuffers serialization.