Senior Performance Engineer (APM)
Emilii Plater 10, Warszawa
KUBO
Do you enjoy digging deep into application performance until you find the real root cause? Would you like to working within the financial sector where your APM expertise truly makes a difference? If you like solving complex performance issues in modern distributed systems, apply today! Join a highly skilled team and take ownership of performance engineering at scale.
Key responsibilities
Analyze and optimize application performance using a major APM tool (Dynatrace, AppDynamics, or New Relic).
Investigate Java performance issues (JVM tuning, GC, thread and heap dumps).
Identify and resolve database bottlenecks, including slow query analysis.
Work with web and application servers (Apache, Nginx, Tomcat, JBoss) in complex architectures.
Cooperate with development and operations teams to prevent and solve performance incidents.
Perform deep, drill-down performance analysis and present findings in a clear and actionable way.
Ideal candidate profile
7+ years of experience in Performance Engineering, APM, or Senior SRE roles.
Expert hands-on experience with a leading APM platform (e.g. Dynatrace, AppDynamics or New Relic).
Strong understanding of Java application performance and debugging.
Proven experience analyzing database performance issues.
Solid knowledge of web (Apache, Nginx) and application server (Tomcat, JBoss) architecture
Strong communication skills and exceptional drill-down analysis and problem-solving skills.
Preferred: Cloud experience (AWS / Azure / GCP) and Kubernetes / Docker.
Preferred: Python or Shell scripting and familiarity with observability tools (Prometheus, Grafana, ELK Stack).
Conditions
Project duration: until 31.12.2026
Start date: January/February 2026
Work Model: Remote
Employment Type: B2B
Salary: based on your experience
Recruitment steps
• Initial call with a KUBO recruiter
• Interview with the client (75-90 minutes)
• Decision and feedback
Senior Performance Engineer (APM)
Senior Performance Engineer (APM)
Emilii Plater 10, Warszawa
KUBO