Senior Java Engineer - Cloud-Native Backend Development 100% (f/m/d) - (Contract through our external payroll partner with immediate start for 12 months with possible extension)

At Julius Baer, we celebrate and value the individual qualities you bring, enabling you to be impactful, to be entrepreneurial, to be empowered, and to create value beyond wealth. Let’s shape the future of wealth management together. We are seeking a highly skilled Senior Java Engineer to lead the design and development of a critical cloud-native backend system as part of a strategic initiative to modernise a large-scale legacy application.

• Lead a complete re-architecture using modern Java technologies, primarily Spring Boot
• Build scalable, resilient services from the ground up
• Develop and operate high-throughput, distributed systems in a cloud environment
• Leverage cutting-edge practices, including AI-assisted development tools, to accelerate delivery without compromising quality
• Apply deep expertise in enterprise-grade Java backends, cloud platforms, and performance optimisation
• Act as a technical leader in complex transformation programmes

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• 8+ years of experience in server-side Java development, ideally within financial or other regulated, high-performance domains
• Deep proficiency in Java 21+ and the Spring ecosystem (Spring Boot, Spring Data, Spring Security, Spring Cloud)
• Expertise in designing high-throughput, low-latency systems using asynchronous processing, message brokers (Kafka, RabbitMQ), and caching (Redis, Caffeine)
• Experience with workflow and BPMN frameworks (Flowable, Camunda) or streaming/analytics platforms (TIBCO StreamBase, Spotfire)
• Hands-on experience building, operating, and refactoring cloud-native microservices on AWS, Azure, or GCP, including migrating monolithic systems
• Proficiency with containers (Docker), orchestration (Kubernetes), service mesh, and cloud storage and services
• Experience designing and consuming RESTful APIs and gRPC services, including protocol buffers, streaming, and polyglot integration
• Expertise in securing APIs and services using OAuth2, JWT, TLS, and identity providers
• Proficiency in application observability using Micrometer and OpenTelemetry for metrics, distributed tracing, and contextual logging
• Practical exposure to AI-assisted development workflows and integrating generative AI tools into IDEs and code reviews
• Experience working within the Markets and/or Trading business domain would be preferred
• Strong problem-solving mindset with the ability to articulate technical trade-offs to peers and stakeholders
• Proactive collaborator in agile, cross-functional teams, experienced in mentoring junior engineers
• Business-fluent English (C1/2) We are looking forward to receiving your full job application through our online application tool. Further interesting job opportunities can be found on our Career site . Is this not quite what you are looking for? Set up a job alert by creating a candidate account here .