Senior Resilience Engineer

Job Description

A financial company is seeking a Senior Resilience Engineer to ensure the reliability, scalability, and robustness of its applications and platform. This role combines structured resiliency testing with chaos engineering principles to proactively uncover weaknesses and strengthen the product against failures. The position operates in a hybrid work model and requires candidates to be based in Kraków.

What this role involves:

• Designing and implementing structured resiliency test patterns targeting Java services.
• Developing fault injection mechanisms to evaluate system behavior under failure conditions.
• Collaborating with SRE, Infrastructure, and observability teams to enhance visibility, fault tolerance, and recovery strategies.
• Implementing self-healing mechanisms to improve system resilience and minimize downtime.
• Defining and tracking resiliency KPIs, ensuring continuous monitoring and reporting of system performance under failure conditions.
• Participating in postmortems and providing actionable insights to strengthen application reliability.
• Partnering with developers to establish and enforce best practices for fault tolerance and resilient architecture design.

Requirements:

• Strong experience in Java development.
• Deep understanding of JVM internals and failure modes.
• Experience with resilience libraries (e.g., Resilience4j).
• Familiarity with distributed systems and microservices failure patterns.
• Experience with testing frameworks (e.g., JUnit, Testcontainers, WireMock).
• Exposure to chaos engineering practices and tooling.
• Deep understanding of high-availability architectures, disaster recovery, and fault injection techniques.
• Familiarity with containerized environments (Docker, Kubernetes) and observability tools (preferably Prometheus & Grafana).
• Excellent analytical and troubleshooting skills.

The role offers:

• Opportunity to work in a hybrid work model.