Hybrid Senior Performance Engineer

Posted last month

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About the role

  • Performance Engineer managing performance engineering for endpoint security products. Collaborating with R&D to deliver actionable performance insights and improvements across release cycles.

Responsibilities

  • Own and run performance regression for each release
  • Define performance test strategy for new features with R&D
  • Investigate performance degradations end-to-end using logs, profiling, and tracing
  • Analyze performance impact across kernel/driver-level and user-mode components
  • Create high-signal bug reports
  • Contribute to our internal performance testing framework (C/Rust/Go)
  • Build and maintain Grafana dashboards and performance reports
  • Assist Support with performance-related escalations
  • Prepare and maintain performance test environments across Windows / Linux / macOS
  • Deploy and operate test builds/agent versions in the lab

Requirements

  • 5+ years in Performance Engineering, QA Automation, Software Engineering, Support Engineering, or similar technical roles
  • Proven experience investigating performance problems end-to-end
  • Strong Windows practical skills: services/drivers, logs, process/thread inspection, diagnostics, and system tooling
  • Ability to work close to OS boundaries (user-mode vs kernel/driver-level behavior)
  • Hands-on experience with Windows Performance Toolkit / ETW investigations
  • Working knowledge of networking fundamentals (DNS, TLS/certificates, endpoints, basic connectivity troubleshooting)
  • Understanding of HTTP/HTTPS fundamentals and REST API basics
  • Strong scripting ability (Python, Bash, PowerShell)
  • Experience using AI tools to accelerate engineering/QA workflows
  • Ability to read code and reason about performance implications
  • Hands-on experience deploying/debugging complex software in a lab environment
  • Clear written and verbal communication skills in English (Upper-Intermediate+)
  • Ability to work independently in a small team with high ownership and minimal supervision.

Benefits

  • Professional development opportunities
  • Health insurance

Job title

Senior Performance Engineer

Job type

Experience level

Senior

Salary

Not specified

Degree requirement

Bachelor's Degree

Location requirements

HybridBulgaria

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