Senior API Engineer (Java)

• Prestigious position at one of the world’s largest banks
• Stable, long-term projects
• Competitive salary with a B2B contract
• Hybrid work (6 days per month from the office in Cracow)
• Private healthcare and multisport card
• Personal growth and development opportunities with the possibility to rotate between projects

Daily tasks

• Design and build APIs and microservices for the new payment engine
• Create architectural artefacts (low-level designs, data models, gap analysis)
• Ensure high availability, resilience, and performance, including JVM tuning
• Modernise the existing payment estate and drive cloud adoption
• Work with the DevOps team on CI/CD and infrastructure automation
• Provide technical guidance and mentoring to the team

Requirements

• 8+ years of experience with Java and as an API Engineer
• 5+ years in microservices-based back-end development (Spring Boot, caching, middleware, security/authentication)
• Hands-on experience with Kafka, Docker, Kubernetes, and service mesh
• Experience with monitoring and observability tools (e.g. Splunk, Grafana, Prometheus, Jaeger, OpenTelemetry)
• Cloud experience: VPC, firewalls, IAM, sizing and costing
• Solid knowledge of Linux, networking, and load balancing
• Excellent English
• A degree in Computer Science, Engineering, or a related field

Must have: Java, API, Microservices, Kafka, Cloud, Linux

Nice to have: Rust, SQL