Senior Performance Engineer (APM)

DevOps

Senior Performance Engineer (APM)

DevOps
Emilii Plater 10, Warszawa

KUBO

Full-time
B2B
Senior
Remote
40.81 - 65.30 USD
Net per hour - B2B

Job description

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

Tech stack

    English

    C1

    Polish

    B2

    NGNIX

    advanced

    Apache

    regular

Office location

Published: 21.12.2025

About the company

KUBO

As KUBO, we are an award-winning provider of HR, software, and engineering services. Our mission is to support technology-driven industry leaders with staffing, recruitment, team leasing, and managed services. With offic...

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