Performance Engineer

We are looking for a Senior Performance Engineer to own the performance posture of Gcore’s Edge Network — from defining testing strategy and observability, to shipping latency improvements at fleet scale. You will operate at the intersection of systems engineering, network infrastructure, and developer experience, enabling teams to move fast without breaking performance.

What you’ll do:

• Define and continuously evolve the performance testing strategy. Ensure test workloads mirror production traffic patterns, regression suites remain green, and alerts are acted upon with documented runbooks. 
• Instrument the edge fleet for deep observability — latency histograms, resource saturation signals, and tracing pipelines — so performance regressions surface before they reach end users. 
• Design and enforce staged (A/B, canary) rollout processes for performance-sensitive changes. Own the feedback loop between test environments and production. 
• Identify and drive systemic throughput, latency, and efficiency improvements across the edge network — from kernel tuning and eBPF offloads to traffic shaping and caching strategy. 
• Continuously raise the bar on configuration management, agentic workflows, and automated performance gates. Reduce toil; increase signal-to-noise in performance data. 
• Guide ops, dev, and support engineers through technical direction, runbooks, and shared test environments. Raise the performance literacy of the broader engineering org. 
• Partner with Product, R&D, Network, Security, and Support teams to ship performance-aware features. Serve as a subject-matter expert during performance-related incidents and drive post-incident improvements. 

What We Are Looking For:

• Deep expertise in Linux/Unix environments — kernel internals, process scheduling, memory management, and I/O subsystems. 

• Proficiency with performance profiling and tracing tools: eBPF (bpftrace, libbpf), perf, gdb, strace, flamegraphs, and related tooling. 

• Strong scripting and automation skills — Python, Bash, and infrastructure-as-code (Ansible, Terraform, or equivalent). 

• Solid understanding of networking fundamentals: TCP/IP, HTTP/2–3, TLS, load balancing, and traffic engineering. 

• Experience with cloud platforms (AWS, Azure, GCP) and hybrid/bare-metal edge infrastructure. 

• Hands-on experience with agentic coding workflows and AI-assisted engineering toolchains. 

• Excellent communication skills — able to translate low-level performance findings into business impact for diverse audiences. 

Nice-to-have:

• Puppet, Prometheus, Grafana, VictoriaMetrics / Victoria Logs 

• BGP and related routing protocols 

• Programming in C, Go, Rust, or Python 

• eBPF program authorship 

• Kernel bypass networking (DPDK / XDP) 

• Web security and DDoS mitigation practices 

• AI/ML in production systems 

• Edge / CDN architecture 

Benefits

At Gcore, we want you to do your best work and enjoy the journey. Our benefits are designed to support your growth, well-being, and life beyond work: 

• Competitive compensation 
• Flexible working hours and hybrid or remote options, depending on your role 
• Work from anywhere in the world for up to 45 days per year 
• Private medical insurance for you and your family* 
• Extra paid vacation and sick leave days* 
• Support for life’s important moments and celebrations 
• Language courses to help you connect and grow 
• Modern, welcoming offices with snacks, drinks, and entertainment* 
• Team sports and social activities* 

*Benefits may vary depending on your location. 

Equal Opportunity Employer 

We provide equal opportunity to all applicants without regard to race, color, religion, sex, sexual orientation, age, gender identity, gender expression, national origin, disability, or any other legally protected characteristics.