Senior SRE - Networks

Fastly, Inc.; Greater London; Hybrid; GBP 120,000 - 160,000; Full time

Job summary

Fastly, Inc. is seeking an experienced Senior SRE focused on Networks to grow and operate the edge cloud platform’s global footprint. You will respond to traffic incidents, lead edge cases, and contribute to code and automation that improve network reliability.

You’ll collaborate with cross‑functional teams to shape roadmaps, mentor colleagues on routing concepts, and ensure performance targets for end users worldwide, in a hybrid London/UK role.

Qualifications

• Experience with TCP/IP, BGP, Anycast and DNS in large networks.
• Automation and coding in Python or similar.
• Exposure to Tier 1 providers, IXPs and cloud platforms.
• Ability to analyze traffic patterns with flow-based tools.
• Proficient in monitoring/observability tools (Grafana, Prometheus, Splunk).
• Knowledge of DevOps practices and CI/CD pipelines; Linux administration.
• Strong documentation skills and cross-functional collaboration.

Responsibilities

• Build, operate, and maintain Fastly’s global network footprint.
• Lead network incidents and optimize edge-case recovery strategies.
• Develop automation to improve network operations and tooling.
• Monitor performance with a focus on end-user experience.
• Collaborate with engineering to shape roadmaps and software solutions.
• Mentor teammates on global routing and anycast environments.

Skills

TCP/IP

BGP

Anycast

DNS

Python

Cloud platforms

CI/CD

Linux/Unix

Network telemetry

Tools

Grafana

Prometheus

Splunk

Job description

Fastly helps people stay better connected with the things they love. Fastly’s edge cloud platform enables customers to create great digital experiences quickly, securely, and reliably by processing, serving, and securing our customers’ applications as close to their end-users as possible — at the edge of the Internet. The platform is designed to take advantage of the modern internet, to be programmable, and to support agile software development. Fastly’s customers include many of the world’s most prominent companies, including GitHub, Yelp, Paramount, and JetBlue. We're building a more trustworthy Internet. Come join us.

Senior SRE - Networks

Fastly’s Technical Operations (TechOps) team is responsible for building & operating the infrastructure that powers the Fastly Edge Cloud Platform. We oversee an extensive global network that spans 6 continents with over 100 points of presence and 578 Tbps of connected capacity. Our platform serves a significant portion of the content delivered to internet consumers across the planet, with customers ranging from online media streaming services to e-commerce, to open source projects, nonprofits and more. We take this responsibility seriously! We’re looking for an experienced SRE with strong focus on Networks, SRE principals and knowledge of the internet who can bring engineering best practices, operational rigour, and automation skills to help craft the future of Fastly’s network and directly contribute to making the internet better.

What You’ll Do:

• Build, operate, and maintain the continually growing global network footprint of Fastly’s Edge Cloud Platform.
• Response to significant traffic incidents and lead network incidents, resolving edge cases and failure scenarios with your expertise in IP routing, particularly BGP.
• Write code that is performant, maintainable, clear, and concise and contribute to code reviews, improving the codebase and other team processes Partner in the development and iteration of tools and automation systems that improve how we operate and build the network.
• Innovate new methods for monitoring network performance, focusing on the end-user experience, and proactively address potential issues.
• Continual deep-dive of performance-based analytics and close involvement with partner teams to maintain a performant global network.
• Advocate for the operational stability of the network by identifying opportunities and partnering with engineering teams to shape their roadmaps and software solutions.
• Mentor team members on the complexities of global routing, especially in an anycast-heavy environment.

What We’re Looking For:

• Experience in the protocols and practices that make up the fabric of the global internet, including TCP/IP, BGP, Anycast and DNS.
• Experience in Automation and coding using languages like Python, or similar.
• Proficiency in Tier 1 Internet service providers, Internet exchanges and cloud providers.
• Ability to analyze internet traffic patterns across multiple dimensions using flow-based tools.
• Experience working with alerting, monitoring and visibility tools (such as Graphite/Grafana, Prometheus, or Splunk).
• Knowledge across cloud hosting solutions (i.e., GCP, AWS and Azure).
• Knowledge of DevOps practices and CI / CD pipelines (ie. Git, Jenkins, Ansible).
• Understanding of Linux/Unix systems administration and network stack optimisation.
• Adept at knowledge sharing and creating comprehensive documentation to empower teams.
• Able to collaborate with cross-functional teams to shape the technical roadmap, prioritizing initiatives to optimize automation tooling and the network.
• We’ll be super impressed if you have experience in any of these: Experience writing production-level code using VCL or GO Experience in network telemetry including instrumenting infrastructure and collecting, processing, storing and analyzing data Experience working with geographically dispersed teams: previous remote work preferred

Work Hours: This position will require you to work during scheduled hours from 0800 - 1700. This position will require you to be available during core business hours. It may also require occasional nights and weekends as necessary to support any on-call coverage.

Work Location(s) & Travel Requirements: Fastly currently embraces a largely hybrid model for most roles which allows employees flexibility to split their time between the office and home. This position may require travel as required by your role or requested by your manager. This position has one opening and can be hired in the following locations: London (Hybrid) UK, Remote

Benefits:

We care about you. Fastly works hard to create a positive environment for our employees, and we think your life outside of work is important too. We support our teams with great benefits that start on the first day of your employment with Fastly. Curious about our offerings? We offer a comprehensive benefits package designed to meet your needs. Our offerings may vary depending on the country where you…