Sr. Software Dev Engineer, Amazon CloudFront (Routing Dataplane)

Do you wonder what happens in the milliseconds between a user clicking play and content appearing on their screen? Do you want to build the systems that make that possible — at global scale, processing millions of requests per second?

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 our ever-growing customer base. We are constantly shipping features that drive innovation in the
CDN market. The environment is fast-paced, collaborative, and full of hard problems worth solving.

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. You will build and optimize critical dataplane components including 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

A 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.

Diverse Experiences
AWS values diverse experiences. Even if you do not meet all of the preferred qualifications and skills listed in the job description, we encourage candidates to apply. If your career is just starting, hasn’t followed a traditional path, or includes alternative experiences, don’t let it stop you from applying.

Why AWS?
Amazon Web Services (AWS) is the world’s most comprehensive and broadly adopted cloud platform. We pioneered cloud computing and never stopped innovating — that’s why customers from the most successful startups to Global 500 companies trust our robust suite of products and services to power their businesses.

Inclusive Team Culture
Here at AWS, it’s in our nature to learn and be curious. Our employee-led affinity groups foster a culture of inclusion that empower us to be proud of our differences. Ongoing events and learning experiences, including our Conversations on Race and Ethnicity (CORE) and AmazeCon (diversity) conferences, inspire us to never stop embracing our uniqueness.

Mentorship & Career Growth
We’re continuously raising our performance bar as we strive to become Earth’s Best Employer. That’s why you’ll find endless knowledge-sharing, mentorship and other career-advancing resources here to help you develop into a better-rounded professional.

Work/Life Balance
We value work-life harmony. Achieving success at work should never come at the expense of sacrifices at home, which is why we strive for flexibility as part of our working culture. When we feel supported in the workplace and at home, there’s nothing we can’t achieve.

Basic Qualifications

- Experience as a mentor, tech lead or leading an engineering team
- Bachelor's degree in computer science or equivalent
- Experience in professional, non-internship software development, or experience in embedded development in C/C++
- Experience working with networking fundamentals or Internet protocols such as TCP/IP, UDP, SSL, DNS, HTTP/S, or equivalent
- Experience building complex software systems that have been successfully delivered to customers
- Knowledge of Linux or Unix systems administration

Preferred Qualifications

- Experience in major internet routing protocols, specifically BGP and OSPF
- Experience using scripting languages, such as Python, Perl, 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

Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We value your passion to discover, invent, simplify and build. Protecting your privacy and the security of your data is a longstanding top priority for Amazon. Please consult our Privacy Notice (https://www.amazon.jobs/en/privacy_page) to know more about how we collect, use and transfer the personal data of our candidates.

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.

Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.