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Skyhigh Security Logo Skyhigh Security · IT - Software Development

Performance Testing SDET

Germany, Paderborn · Job Posted February 20, 2026
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Job Description

Skyhigh Security is looking for a performance-focused engineer who lives at the intersection of networking, security, and high-scale systems. You won't just be "running tests" - you will be breaking things, finding bottlenecks in complex enterprise environments, and helping us ensure our security solutions remain lightning-fast under heavy load.

Job Responsibility

  • Help building and simulating complex high-load scenarios to identify where our systems might bend and break, identify bottlenecks
  • Work closely with Dev teams during early stages of development
  • Monitoring, tuning, developing and maintaining performance tests, including internal test labs / environments (hardware / software)
  • Maintain and expand our Python-based regression frameworks and performance toolchains
  • Assist in product quality verifications

Requirements

  • 5+ years of hands-on engineering in software testing, specifically performance measurement and systems capacity testing (Cloud / Hybrid / On-Premise)
  • Very good understanding of Linux operating systems and techniques to identify bottlenecks quickly (e.g. CPU, RAM, I/O, etc.)
  • Experience with Kubernetes and Docker in a performance context
  • Solid grasp of TCP/IP, HTTP, HTTP/2, TLS, SSL, DNS, and Web Proxies
  • Familiarity with tools like tcpdump, network traces analysis
  • Strong Python skills
  • Ability to leverage AI for faster troubleshooting or prototyping while remaining critical of its output
  • Fluent English is required (German is a plus)
  • Good communication skills
  • Team player
  • Ability to work independently on deep-dive tasks
  • Open-minded and comfortable in a multicultural environment
  • Perseverance to find root causes
  • Ability to think out-of-the box

Nice to have

  • Familiarity with C/C++
  • German language skills

What we offer

  • Retirement Plans
  • Medical, Dental and Vision Coverage
  • Paid Time Off
  • Paid Parental Leave
  • Support for Community Involvement
  • Hybrid work model (good office / home-office days balance)
  • Professional, friendly environment
  • A culture that values learning
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