{"id":3966664,"url":"https://alion.io/job/itds-poland-expert-java-api-engineer-payment-processing","title":"Expert Java API Engineer – Payment Processing","company":{"id":879,"name":"ITDS Poland","domain":"itds.pl","url":"https://alion.io/company/itds","size_band":"501-1000","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kraków, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":30240,"max":36330,"currency":"PLN","period":"month","gross":null,"usd_annual":110664},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"Go","optional":false},{"name":"Grafana","optional":false},{"name":"IAM","optional":false},{"name":"Jaeger","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"Prometheus","optional":false},{"name":"Rust","optional":false},{"name":"Service Mesh","optional":false},{"name":"Splunk","optional":false},{"name":"Spring Boot","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-11-09T12:15:11Z","employer_posted_date":null,"last_verified_at":"2026-11-09T12:15:11Z","board_verified":false,"closed_at":null,"days_open":3,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":3},"description":"Unleash the future of payments — engineer resilient, cloud-ready platforms that power next-generation financial services!\nKrakow-based opportunity with hybrid work model.\nAs an Expert Java API Engineer, you will be working for our client in the financial services industry, helping deliver a future-state architecture for payment processing. You will build lean, reusable payment capabilities focused on high availability, resilience, modernization, and cloud adoption—enabling new products to reach customers faster, with greater quality and efficiency.\nYour main responsibilities:\nDeliver engineering expertise for future-state payment processing architecture.\nDesign, develop, test, debug, and document high-quality software and API solutions.\nBuild highly available and resilient payment processing services using modern microservice architectures.\nProduce architectural artefacts, technical alternatives, data models, and low-level designs.\nPartner with DevOps teams to enable automated infrastructure delivery, DevSecOps value streams, and CI/CD pipelines.\nProvide technical leadership, architecture guidance, mentoring, and consultation to development teams.\nIdentify and resolve complex architectural, development, technical, and business issues.\nSupport the modernization of the payment estate while ensuring compliance with relevant controls, standards, cybersecurity, and data privacy requirements.\nYou're ideal for this role if you have:\nA Bachelor’s degree in Computer Science, Engineering, or a related field.\n15+ years of applied experience as an API Engineer and 10+ years of software engineering experience.\n10+ years of programming experience in Java.\nExpert knowledge of distributed systems, microservices, and Spring Boot.\nStrong expertise in Docker, Kubernetes, service mesh, Kafka, and Kubernetes CNI.\nExperience with API design, application security, authentication, caching, middleware, and architectural documentation.\nExpertise in JVM tuning, diagnostics, troubleshooting, and performance optimization.\nPractical knowledge of cloud and DevOps technologies, including VPC/firewall, IAM, cloud sizing and costing, monitoring, and observability tools such as Splunk, Grafana, Prometheus, Jaeger, Kiali, and OpenTelemetry.\nIt is a strong plus if you have:\nExperience with Go and Rust programming languages.\nExpert-level SQL coding abilities.\nExperience working in a financial institution, ideally within payments.\nExperience with distributed databases.\nLanguage Required for the role: Fluent English, both written and verbal.\nEligibility for the role: Only candidates with an existing legal right to work in Europe will be considered for this role.\n#MAKEYourCareerBETTER\nInterested? 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