In Cyclad, we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. We are seeking an experienced Senior Backend Developer to join a remote development team. The role focuses on designing and building core backend services for ORA, enabling secure cloud integration with SEF using KMIP and Barbican. Project information: Type of project: IT services Office location: Warszawa Work mode: Remote Budget: 160-180 PLN net /h - b2b Project length: Long-term Only candidates with citizenship in the European Union and residence in Poland Start date: ASAP (depending on the candidate's availability) Project scope: Design and implement backend services for ORA core, integrating with KMS via KMIP for services such as Barbican and Ceph Develop and maintain Kubernetes-based infrastructure, including Custom Resource Definitions (CRDs), operators, and controllers Build secure communication layers leveraging TLS and advanced data encryption techniques Collaborate with architecture and infrastructure teams to ensure seamless integration across management layers Implement unit and integration tests to ensure code quality and reliability Contribute to system design decisions and provide technical leadership for backend architecture Requirements: Strong backend development experience in Java, Golang, or Python Solid understanding of cryptography, e.g., TLS, data encryption Hands-on experience with Kubernetes, including infrastructure and management layers Experience with OpenStack Experience in unit and integration testing for backend services Ability to work on complex distributed systems and core services Strong logical thinking, independence, and problem-solving skills Fluent in English (minimum C1) We offer: Remote working model Full-time job agreement based on b2b Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible Multisport card (also for an accompanying person) Life insurance