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Principal Support Engineer (L3, Edge Network) Miejsce pracy: Kraków Technologies we use Expected Grafana Kibana Splunk Optional Akamai Cloudflare Fastly CloudFront Python Bash Operating system Linux About the project We are currently looking for a Principal Support Engineer (L3, Edge Network). Working hours are Monday to Friday, 9:00 am to 6 pm, with the expectation of availability during critical incidents outside regular hours. Your responsibilities Act as the 3rd-level escalation point for complex technical issues related to CDN and Edge Network products. Diagnose and resolve advanced issues involving caching, DNS, routing, load balancing, SSL/TLS, and web security. Take ownership of high-severity incidents (P1/P2) and drive resolution in collaboration with Engineering, Network, and Operations teams. Asist with root cause analysis (RCA) and contribute to preventive measures to reduce incident recurrence. Analyze traffic patterns, cache efficiency, and node performance to optimize content delivery. Support production changes, maintenance windows, and software upgrades. Provide technical guidance and mentorship to L1 and L2 Support Engineers. Maintain and improve internal documentation, runbooks, and troubleshooting guides. Participate in post-incident reviews and continuous improvement initiatives. Our requirements 5 years of experience in Technical Support, Network Engineering, or Systems Engineering. Strong understanding of CDN and Edge Network concepts (caching, PoPs, traffic routing). Solid networking knowledge (TCP/IP, DNS, BGP, load balancing). Hands-on Linux/Unix administration and troubleshooting experience. Experience with monitoring and log analysis tools (Grafana, Kibana, Splunk, etc.). Ability to analyse complex incidents and work effectively under pressure. Strong communication skills in English (B2 or higher). Ownership mindset and strong problem-solving skills. Optional Experience with CDN providers (Akamai, Cloudflare, Fastly, CloudFront). Knowledge of DDoS mitigation, WAF, and Edge security concepts. Automation or scripting experience (Python, Bash). This is how we work on a project Continuous Deployment Continuous Integration What we offer 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. Benefits private medical care 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. Gcore Have you ever wondered why your favorite apps, social media content, and video games load in the blink of an eye? Its likely because of Gcore behind the scenes! Join a team that collaborates with industry giants like Intel, Dell, NVIDIA,, and Equinix to accelerate AI training, provide cutting-edge cloud services, and optimize content delivery. If you are passionate about transforming the internet and contributing to cutting-edge innovations, come join us at Gcore! We are over 550 professionals and currently looking for a Technical Support Engineer to join our team.