FIX Protocol is the global standard for institutional-grade broker connectivity. We build FIX API integrations for direct broker connections, low-latency execution systems and prime brokerage integrations — for firms that have outgrown retail platform limitations and need the speed, reliability and control of direct market access.
The Financial Information eXchange (FIX) Protocol is the universal messaging standard for institutional financial market connectivity worldwide. For proprietary trading firms, hedge funds, family offices, and high-volume quantitative desks that have outgrown the latency bottlenecks, order rate limits, and architectural constraints of retail trading platforms, FIX API integration delivers unfiltered direct market access (DMA) with deterministic microsecond order execution.
We engineer enterprise-grade FIX Protocol integrations — connecting proprietary execution algorithms, order management systems (OMS), and custom Python engines directly to Tier-1 prime brokers, institutional liquidity pools, and ECN exchanges. Every FIX engine incorporates bi-directional session heartbeat recovery, sequenced message validation, sub-millisecond execution routing, and real-time pre-trade risk controls — delivered production-ready with 100% full source code ownership, zero recurring licensing fees, and zero vendor lock-in.
From custom FIX engine connectivity and prime brokerage integration to ultra-low latency execution engines and institutional order management systems — delivered with complete source code ownership.
We build automated trading systems across all major retail and institutional environments. Explore our specialized development capabilities across other platforms.
Institutional connectivity. Deterministic low-latency routing. Delivered with complete source code ownership.
[Client Case Study Placeholder — To be supplied by client before final deployment] A systematic quantitative hedge fund required a bespoke FIX 4.4 execution engine to route multi-million dollar FX and equity orders to three Tier-1 prime brokers simultaneously. The architecture required strict sub-millisecond execution handling, zero message drops, automated sequence gap recovery, and a dedicated Drop-Copy session for live risk compliance monitoring.
Engineered a high-performance FIX 4.4 messaging engine with asynchronous memory-mapped ring buffers, multi-session management, and sub-100 microsecond pre-trade risk validation gates. Implemented automated heartbeat recovery, bi-directional gap fill handling, and real-time trade drop-copy streaming to internal regulatory databases.
Successfully deployed in production collocated near broker cross-connects. Achieved 99.999% gateway uptime, deterministic latency profiles under high market volatility, and passed all Tier-1 broker certification testing within 3 weeks.
Answers to the most common questions about our FIX Protocol connectivity, prime broker integrations, and institutional trading engineering services.
Production architectures, platform comparisons and step-by-step implementation guides from our quantitative engineering team.
Technical deep-dive into copier architecture, latency bottlenecks, order replication, and risk management in multi-account deployments.
A practical developer comparison between MT4 and MT5 covering execution models, multi-currency backtesting, 64-bit performance, and platform migration.
Learn how to automate charting strategies using webhook bridges, JSON alert payloads, and resilient algorithmic execution engines.
Whether you need a single broker connection or a complete institutional execution infrastructure — tell us what you're building. We'll scope it, design it and deliver it to production standard. Most projects start within 5 business days.
Or email info@psi-square.net · Phone +44 (0) 20 3872 7195 · We reply within 24 hours · NDA available on request
