Engineering leader. Twenty years building systems where failure is expensive — sub-millisecond trading infrastructure, life-critical clinical workflows, and the metadata layer behind a product Apple shipped.
| 90+ trading venues | Exchange connectivity at IMC Financial Markets — FIX, MDP 3.0, iLink, ITCH, Pillar |
| Apple Music Classical | Built the 5M-recording classical metadata database at Primephonic, acquired by Apple in 2021 |
| 2 US patents | Emergency radiology workflow — closed-loop critical notification and escalation chains |
| 630+ securities | Goldman Sachs reconciliation platform, delivered in 4 months |
| 3 months | ETF market-making desk, zero to production |
Currently at ING, building FX swap market data systems for capital markets. Previously Flow Traders, Primephonic, IMC Financial Markets, Lakeland Healthcare, Nighthawk Radiology, and Rockwell Automation. Mentor at Cambridge.
nasdaq-itch-ouch — building a Nasdaq market driver in Java across nine parts: a working FIX session on QuickFIX/J, then SoupBinTCP, OUCH, ITCH over MoldUDP64, and a zero-allocation ring-buffer pipeline. Every part ships code that runs against a local venue simulator and a number that was measured rather than asserted.
jvm-latency-receipts — four reproducible ways JVM latency measurements mislead, with the full percentile distributions committed. A 200ms stall reported as a 5.8µs p99.9 by a naive harness and 202,244µs by a corrected one — same run, same stall, ~35,000× apart. Measuring correctly changes the answer by more than most of the things people benchmark.
CodeSpark Tech — AI products for work that can't fail: clinical quality, medical language, and human-risk governance for regulated operations.
dutch-asr-benchmarks — public evaluation receipts for Vlotspraak, our Dutch speech-recognition engine. 3.5% WER on Common Voice NL under the community benchmark's own NIST sclite tooling, against 4.3% for the previous best on the board. Ships with a same-model control run and a train-on-test contamination check, because a benchmark number without a receipt isn't a result.
Languages — Java, Kotlin, Python, C++
Low latency — LMAX Disruptor ring buffers, lock-free data structures, DPDK kernel bypass, NUMA-aware memory, zero-allocation hot paths, JVM and GC tuning
Platform — Spring Boot, Kubernetes, Docker, AWS, GCP, PostgreSQL, MongoDB
Domains — market data, order management, reconciliation, and exchange protocol integration across equities, options, ETFs, and FX
Leadership — CTO, VP Engineering, and Head of Technology roles in capital markets and regulated AI.
Advisory and specialist delivery — architecture review, three-to-six-month buildouts, embedded technical leadership.
Amsterdam, globally mobile. Engagement details at arindampaul.com/engage.
- The Architecture of Speed — ring buffers, the LMAX Disruptor pattern, exchange protocol implementation, and Java performance at microsecond scale
- Two Patents and Zero Patients Lost — closed-loop messaging and real-time escalation for critical radiology studies
- How a Rare Book Became Apple's Most Beautiful App — the Da Capo catalog and the architecture behind 5M+ classical recordings
Most recent: Why I Mentor at Cambridge (And What the Next Generation Teaches Me)
All posts at arindampaul.com/blog.