Senior R&D Engineer
Core
Lead end-to-end performance measurement, analysis, and optimization for Proton VPN across clients, platforms, and global infrastructure.
Role type
Senior Performance Engineer (Networking/Systems)
Builds
Proton VPN service (fastest, most resilient, reliable)
Domain
Cybersecurity / Networking / Distributed Systems
Deliverable
production ML models | product features | dashboards & analysis | infrastructure
Required skills
Performance engineering, Systems QA, Network protocols (TCP/IP, UDP, TLS, WireGuard), Latency/throughput/stability analysis, Python, Network emulation/simulation, Monitoring/observability stacks, CI/CD pipelines
Preferred skills
Rust, C/C++, System development, Cross-platform development (Linux, macOS, Windows, Android, iOS)
Technologies
Python, tc/netem, iperf, IPTables/nfTables, Grafana, Prometheus, Loki
Responsibilities
Design and own performance framework defining metrics and KPIs; Develop distributed testing systems simulating real network conditions; Continuously measure and analyze performance across platforms and regions; Collaborate with backend, R&D, and client teams to optimize protocol handling and encryption; Create dashboards, reports, and automated alerts; Contribute to resilient connectivity strategies; Mentor others and drive data-driven performance culture
Seniority
Senior, hands-on IC
