Overview
Amazon CloudFront is looking for an experienced Software Development Engineer to join our Routing Dataplane team in Dublin, Ireland. CloudFront is one of the world's largest content delivery networks. Working on systems with global scale is a daily part of the job. We build reliable, scalable, low‑cost systems that serve an ever‑growing customer base and continuously ship features that drive innovation in the CDN market.
This role sits at the intersection of distributed systems, networking, and performance engineering. You will work on systems that operate at global scale, processing millions of requests per second and delivering content with high availability, low latency, and strong security guarantees. Your responsibilities will include building and optimizing critical dataplane components such as layer‑4 packet processing, TCP/IP stack enhancements, DDoS detection and mitigation, and anycast‑based routing systems.
Key Job Responsibilities
Design and build high‑performance networking systems that operate in the CloudFront edge network
Develop and optimize layer‑4 packet processing pipelines for ultra‑low latency and high throughput
Enhance TCP/IP stack behavior for performance, congestion control, and resilience at scale
Build systems for real‑time DDoS detection, mitigation, and traffic shaping
Design and evolve anycast routing strategies to improve global traffic distribution and availability
Own critical dataplane services end‑to‑end: design, implementation, deployment, and operations
Analyze large‑scale network telemetry to identify performance bottlenecks and failure modes
Drive operational excellence, including monitoring, alerting, and rapid incident response
Contribute to architectural decisions that influence global traffic engineering strategies
Day in the Life
You will work on systems that operate at massive global scale, solving complex problems in networking, distributed systems, and real‑time traffic engineering. You will analyze network telemetry data to find and fix performance bottlenecks, ship improvements to packet processing pipelines, and collaborate with teams across AWS to influence how content is delivered, secured, and optimized across the internet.
Basic Qualifications
Experience as a mentor, tech lead or leading an engineering team
Bachelor's degree in computer science or equivalent
Professional, non‑internship software development experience, or embedded development in C/C++
Experience with networking fundamentals or Internet protocols such as TCP/IP, UDP, SSL, DNS, HTTP/S, or equivalent
Experience building complex software systems successfully delivered to customers
Knowledge of Linux or Unix systems administration
Preferred Qualifications
Experience with major internet routing protocols, specifically BGP and OSPF
Experience using scripting languages such as Python, Perl, or Linux Bash
Experience debugging, diagnosing, and troubleshooting complex, production software issues
Deep experience with packet processing frameworks (e.g., eBPF, XDP, DPDK, or kernel networking stack)
Experience with DDoS detection/mitigation systems or traffic filtering at scale
Experience optimizing systems for CPU, memory, and network efficiency
Familiarity with observability systems and large‑scale telemetry pipelines
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