Senior Fullstack Engineer

O projekcie: 📍 Location: Warsaw or Kraków (hybrid - 2 days in the office per week) 📄 B2B: 170 - 200 PLN / h 🏦 Industry: Financial Services / Payments We are looking for a Senior Fullstack Engineer to join a team working on a large-scale payment platform used in enterprise environments. The platform enables fast, secure, and multi-channel financial operations. The role focuses on building and maintaining backend and frontend services, modernizing legacy systems, and improving automation and efficiency. You will work in an Agile, DevOps-aligned environment with experienced teams. What We Offer: - Work on a long-term, large-scale payment platform. - Real impact on architecture, processes, and modernisation of services. - Hybrid work model (Warsaw or Kraków). - Mature engineering environment with focus on automation and best practices. - Luxmed healthcare package and Multisport card. Wymagania: - Strong experience with Java 11+ (Java 17+ preferred). - Experience with Kubernetes and Git (required). - Fluency in navigating Unix-based systems and command-line interfaces. - Solid knowledge of SQL and relational databases (Oracle preferred). - Practical understanding of REST APIs and microservice architectures. - Knowledge of HTTP/Web technologies, JavaScript and React (preferred). - Experience working in DevOps teams (preferred). - Understanding of application monitoring (desirable). - Knowledge of Spring / Spring Boot (desirable). Codzienne zadania: - Develop and maintain services, microservices, and applications (backend and frontend) using Java 11/17/21 and ReactJS. - Modernize legacy systems, migrating from mainframe and IBM WebSphere to API/microservice-based architectures. - Reduce testing costs by implementing automated testing frameworks. - Improve Straight-Through-Processing (STP) efficiency in services. - Collaborate closely with DevOps and solution delivery teams.