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Trading Systems Integration Engineer - FIX 4.4 Expert

Freelancehybrid5+ yrs📍 Poland - Warsaw, 🇵🇱 Poland🗣 English

Senior engineer designing capital markets integration and workflow orchestration systems.

Design and build middleware connecting trading platforms, blockchain infrastructure, and settlement systems using modern enterprise technologies. You'll implement resilient transaction processing, FIX messaging, workflow orchestration, and event-driven patterns in a financial services environment. This role requires deep expertise in integration architecture, distributed systems, and capital markets domain knowledge, suitable for senior engineers with experience in high-availability trading or payments infrastructure.

Tech stack
JavaSpring Boot.NETC#Node.jsTypeScriptKafkaFIX 4.4REST API
Rate
Not stated by the agency
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Found at a specialist agency · listed 15 September 2026 · InsideJobs links you to the original posting.