Senior Java Developer

Senior Java Developer – B2B Contract (Poland)Greenfield Trading PlatformRole: Senior Java DeveloperType: B2B ContractRate: High‑end market rateDuration: Long‑term, multiple extensions expectedLocation: Warsaw (hybrid)Industry: Financial Services A leading financial institution is expanding its engineering capability in Poland as part of a major strategic platform build. This role has multiple headcount, offering long‑term stability, complex engineering challenges, and direct involvement in shaping a new enterprise‑wide system. Platform OverviewYou’ll be contributing to a greenfield platform that will sit between the UI layer and multiple backend systems across the bank. The first major use case is a consolidated trade blotter covering FX Cash, Options, Commodities and Interest Rates, with production launch targeted this year and ongoing feature expansion planned. Tech stack & direction:JavaSpringOracleMessaging layer: Kafka or SolaceMicroservices architectureReactive programming patternsRole OverviewYou’ll work within the platform engineering function, contributing to backend services, messaging architecture, and integration patterns. The role is hands‑on, delivery‑focused, and suited to engineers who enjoy solving complex problems in high‑impact environments. Consultants Must Have:Core Java expertise - concurrency, collections, practical coding abilityMessaging technologies (Kafka or Solace)Microservices & reactive programmingSolution design around messaging and system integrationFinancial markets knowledge