--- title: "Trading Systems Integration Engineer - FIX 4.4 Expert" company: "Capco" company_url: "https://www.remjobs.works/companies/capco" url: "https://www.remjobs.works/job/capco-trading-systems-integration-engineer-fix-4-4-expert-cf3755e9-efac-4c3b-8fa4-4a6cc1a10eb3" apply_url: "https://job-boards.greenhouse.io/capco/jobs/8201240" workplace: onsite location: "Poland - Warsaw" employment_type: unspecified seniority: mid role: software-engineering region: europe date_posted: 2026-09-14T15:01:07.000Z first_seen_by_remjobs: 2026-09-15T16:21:24.077Z --- # Trading Systems Integration Engineer - FIX 4.4 Expert **Capco** · Poland - Warsaw Apply: https://job-boards.greenhouse.io/capco/jobs/8201240 ## About Capco Capco is a global management and technology consultancy dedicated to the financial services and energy industries. ## About the role **CAPCO POLAND ** ***We are looking for Poland based candidate. ** At **Capco Poland,** we’re not just another consultancy - we’re the spark behind digital transformation in the financial world. As a global leader in technology and management consulting, we thrive on helping clients tackle the toughest challenges across banking, payments, capital markets, wealth, and asset management. **Build resilient integration and workflow solutions at the intersection of capital markets, modern technology and digital assets.** **The Role** As a **Senior Integration & Workflow Engineer**, you’ll provide specialist engineering services focused on designing and developing custom integration and workflow-orchestration components connecting capital markets platforms, blockchain infrastructure and market infrastructure. Design and develop custom integration and workflow-orchestration components connecting capital markets entity’s platforms, Blockchain infrastructure and market infrastructure. The scope includes delivering resilient, secure and auditable services supporting pre-trade validation, transaction orchestration, settlement processing and downstream system integration.. **What You’ll Do** - Design and develop custom middleware and workflow-orchestration services - Build REST/API-based integrations with internal and third-party platforms - Implement transaction and workflow state management, including multi-step processing across systems - Develop orchestration logic for Pre-Trade Gateway, DvP/settlement and downstream integration flows - Implement validation, routing, reservation/earmark and transaction-processing logic - Develop adapters and integration services for external platforms and market-infrastructure systems - Implement idempotency, retry, queueing, replay and recovery patterns for resilient transaction processing - Implement asynchronous/event-driven processing where required by detailed architecture - Build robust exception handling, error classification and operational status management - Implement audit logging, monitoring and traceability across end-to-end workflows - Develop data mappings, transformation and canonical integration models - Support authentication, authorization, API security and enterprise security requirements - Develop automated unit/component tests and support SIT/E2E testing - Troubleshoot complex cross-system integration and production issues - Support CI/CD, deployment, configuration and production-readiness activities - Produce technical documentation and support knowledge transfer/handover - Develop and maintain FIX 4.4 message flows and routing logic connecting the existing exchange environment with the DLT/tokenized order flow - Implement FIX message mapping, validation, routing, acknowledgements, execution reports, rejects and error handling for tokenized order flows **What We’re Looking For** - Strong hands-on experience developing enterprise integration / middleware applications - Strong hands-on experience with FIX 4.4, including message structures, tags, session management, routing, order lifecycle messages and execution reporting - Experience integrating FIX 4.4-based exchange order flows with API/middleware-based downstream systems, including DLT or other non-traditional market infrastructure. - Strong development experience in Java / Spring Boot, .NET/C#, Node.js/TypeScript or comparable enterprise technology stack - Strong FIX 4.4, REST API and service-integration experience - Experience implementing workflow/orchestration or transaction-processing applications - Experience with asynchronous processing, messaging and event-driven patterns such as Kafka, MQ or equivalent - Strong understanding of distributed-system patterns including idempotency, re-tries, timeouts, circuit breakers, concurrency and failure recovery - Experience with relational databases and persistent transaction/state management - Experience integrating with third-party/vendor APIs - Experience with secure enterprise application development, authentication/authorization and audit logging - Experience with Git, CI/CD, automated testing and modern deployment practices - Strong troubleshooting skills across distributed applications and interfaces **Domain & Industry Experience** - Financial services integration experience, particularly capital markets, payments, trading or settlement - Experience with financial-market messaging standards - Experience developing transaction orchestration in regulated/high-availability environments - Exposure to blockchain/DLT, digital assets, smart assets or custody platforms is preferred **We offer a flexible collaboration model based on a B2B contract, with the opportunity to work on diverse projects.** **Recruitment Process:** 1. HR Interview with the recruiter 2. Technical Interview 3. Client Interview 4. Feedback and offer #LI-HYBRID --- Source: Capco's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/capco-trading-systems-integration-engineer-fix-4-4-expert-cf3755e9-efac-4c3b-8fa4-4a6cc1a10eb3