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Będziesz pracować nad systemami, w których niezawodność, spójność danych i bezpieczeństwo operacji finansowych mają realne znaczenie. Jeśli dobrze czujesz się w Javie, Spring Boot, Kafce i architekturze event-driven, a jednocześnie lubisz mierzyć się z modernizacją legacy — ta rola może być dla Ciebie.\nPraca zdalna 100 % \nStawka do 155 zł netto + VAT za godzinę na B2B\nStack: Java 25 · Spring Boot 3.5 · Spring Cloud · Apache Kafka · PostgreSQL · Docker · Kubernetes · Gradle/Maven · SonarQube · Harbor\n🚀 Na czym będziesz pracować?\nrozwijać mikroserwisy odpowiedzialne za płatności i portfel prepaid merchantów — konta, salda, obciążenia, uznania i historię transakcji,\n\nbudować obsługę płatności, doładowań i zwrotów oraz integracje z zewnętrznymi operatorami płatności,\n\nrozwijać procesy fakturowania i integrację z SAP,\n\ntworzyć systemy generowania i dostarczania raportów dla merchantów,\n\nprojektować i rozwijać integracje REST API / Kafka oraz procesy asynchroniczne,\n\nuczestniczyć w migracji starszych serwisów do Clean / Hexagonal Architecture,\n\ntworzyć ADR-y i dokumentację architektoniczną,\n\npisać i rozwijać testy jednostkowe, integracyjne oraz kontraktowe,\n\npracować z Helm, GitLab CI i środowiskami GitOps,\n\nbrać udział w code review, estymacjach oraz wspierać systemy produkcyjne w ramach on-call.\n\nMust have:\nmin. 5 lat komercyjnego doświadczenia w Javie,\n\nbardzo dobra znajomość Java 17+ i Spring Boot,\n\npraktyczne doświadczenie produkcyjne z Apache Kafka,\n\ndobra znajomość SQL, PostgreSQL, migracji baz danych i transakcji,\n\ndoświadczenie w testach jednostkowych i integracyjnych, w tym Testcontainers,\n\nznajomość testów kontraktowych,\n\npraktyczna znajomość Clean Architecture / Hexagonal Architecture oraz DDD,\n\ndoświadczenie z Docker, Kubernetes i CI/CD,\n\numiejętność projektowania REST API / OpenAPI,\n\nznajomość Gradle lub Maven.\n\nMile widziane:\ndoświadczenie w payments, fintech, księgowości lub fakturowaniu,\n\nAvro + Schema Registry,\n\nSpock/Groovy, Spring Cloud Contract,\n\nOpenTelemetry, Prometheus, Grafana, ELK,\n\nHelm, GitOps, ArgoCD lub 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