Senior Software Engineer - Sheffield

- 6+ years building production backend systems (at least 3 years in high-scale or low-latency environments). - Proficiency in one or more: Java/Python/C++/Rust/Go - Strong preference for Java for control-plane/services. - Strong systems design skills: concurrency, memory management, performance tuning, API design, and distributed systems fundamentals. - Experience with DevOps at scale: CI/CD, automated testing, canarying, rollout/rollback, and configuration management. - IaC expertise (e.g., Terraform) and solid cloud infrastructure fundamentals. - Familiarity with DDoS or network security services and related attack/defense patterns. - Solid networking knowledge: TCP/IP, IPv4/IPv6, BGP fundamentals; DNS/DHCP understanding. - Observability experience (metrics, tracing, alerting) and operational excellence mindset. - Experience with anycast routing, traffic steering, and multi-region service readiness (preferred). - Exposure to SDN, programmable data planes, or hardware mitigation platforms (preferred). - Advanced telemetry/streaming pipelines for near-real-time detection (e.g., high-rate packet/flow analytics) (preferred). - Background in resilience engineering, chaos testing, and capacity planning at hyperscale (preferred). - Containerization/orchestration experience and secure service-to-service communication (mTLS, policy) (preferred). - Familiarity with zero trust principles, segmentation, and modern security architectures (preferred).