{"id":920737,"url":"https://alion.io/job/capco-trading-systems-integration-engineer","title":"Trading Systems Integration Engineer - FIX 4.4 Expert","company":{"id":1444,"name":"Capco","domain":"capco.com","url":"https://alion.io/company/capco-poland","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":77,"open_postings":128,"ghost_share":0.023,"stale_share":0.859,"repost_share":0.039,"time_to_fill_p50_days":42,"computed_at":"2026-11-04T06:34:25Z"}},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":57000,"max_usd":94000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":129},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Git","optional":false},{"name":"Java","optional":false},{"name":"Node JS","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"TypeScript","optional":false},{"name":"Apache Kafka","optional":true},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-09-14T15:01:07Z","employer_posted_date":"2026-10-05","last_verified_at":"2026-11-04T10:06:40Z","board_verified":true,"closed_at":null,"days_open":50,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":50},"description":"CAPCO POLAND \n*We are looking for Poland based candidate. \nAt 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.\nBuild resilient integration and workflow solutions at the intersection of capital markets, modern technology and digital assets.\nThe Role\nAs 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.\nDesign 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.. \nWhat You’ll Do\nDesign and develop custom middleware and workflow-orchestration services\nBuild REST/API-based integrations with internal and third-party platforms\nImplement transaction and workflow state management, including multi-step processing across systems\nDevelop orchestration logic for Pre-Trade Gateway, DvP/settlement and downstream integration flows\nImplement validation, routing, reservation/earmark and transaction-processing logic\nDevelop adapters and integration services for external platforms and market-infrastructure systems\nImplement idempotency, retry, queueing, replay and recovery patterns for resilient transaction processing\nImplement asynchronous/event-driven processing where required by detailed architecture\nBuild robust exception handling, error classification and operational status management\nImplement audit logging, monitoring and traceability across end-to-end workflows\nDevelop data mappings, transformation and canonical integration models\nSupport authentication, authorization, API security and enterprise security requirements\nDevelop automated unit/component tests and support SIT/E2E testing\nTroubleshoot complex cross-system integration and production issues\nSupport CI/CD, deployment, configuration and production-readiness activities\nProduce technical documentation and support knowledge transfer/handover\nDevelop and maintain FIX 4.4 message flows and routing logic connecting the existing exchange environment with the DLT/tokenized order flow\nImplement FIX message mapping, validation, routing, acknowledgements, execution reports, rejects and error handling for tokenized order flows\nWhat We’re Looking For\nStrong hands-on experience developing enterprise integration / middleware applications\nStrong hands-on experience with FIX 4.4, including message structures, tags, session management, routing, order lifecycle messages and execution reporting\nExperience integrating FIX 4.4-based exchange order flows with API/middleware-based downstream systems, including DLT or other non-traditional market infrastructure.\nStrong development experience in Java / Spring Boot, .NET/C#, Node.js/TypeScript or comparable enterprise technology stack\nStrong FIX 4.4, REST API and service-integration experience\nExperience implementing workflow/orchestration or transaction-processing applications\nExperience with asynchronous processing, messaging and event-driven patterns such as Kafka, MQ or equivalent\nStrong understanding of distributed-system patterns including idempotency, re-tries, timeouts, circuit breakers, concurrency and failure recovery\nExperience with relational databases and persistent transaction/state management\nExperience integrating with third-party/vendor APIs\nExperience with secure enterprise application development, authentication/authorization and audit logging\nExperience with Git, CI/CD, automated testing and modern deployment practices\nStrong troubleshooting skills across distributed applications and interfaces\nDomain & Industry Experience\nFinancial services integration experience, particularly capital markets, payments, trading or settlement\nExperience with financial-market messaging standards\nExperience developing transaction orchestration in regulated/high-availability environments\nExposure to blockchain/DLT, digital assets, smart assets or custody platforms is preferred\nWe offer a flexible collaboration model based on a B2B contract, with the opportunity to work on diverse projects.\nRecruitment Process:\nHR Interview with the recruiter\nTechnical Interview\nClient Interview \nFeedback and 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