Key Responsibilities - Develop and maintain Spring Boot microservices - Build and manage event-driven integrations using Kafka - Develop TypeScript frontends for internal and external users - Modernize legacy Java workloads into containerized services - Ensure security and compliance across the stack - Drive CI/CD, infrastructure as code, and observability practices Required Skills - 5+ years in Java backend or full-stack development - Experience with containerization (Docker) and CI/CD pipelines - Familiarity with cloud platforms (AWS, Azure, or GCP) - Security-first mindset (OAuth2/OIDC) Nice to Have - Apache Kafka Streams, Kafka Connect - Open Banking standards - Infrastructure as Code (Terraform, CDK, or similar) - Observability tools (Prometheus, Grafana, ELK) - Interest in cybersecurity and threat modeling Why Join Us - Work on mission-critical financial products - DevSecOps-first culture - Flexible work arrangements and continuous learning For further information please contact Jan Jakobsson on e-mail alternatively HR Manager Monika Sigmark on email. We are hiring continuously so please send your application as soon as possible https://www.crosskey.fi/career to but no later than 21st of September 2025.