The Senior Systems Engineer - Traffic Management will build and extend traffic management systems, collaborating with various teams to enhance Cloudflare's global network operations.
Available Locations: London, UK or Lisbon, Portugal
Role Summary
The Traffic Management is responsible for the systems that dynamically route traffic flows into, through, and from Cloudflare's global network.
We don't just manage one company's traffic; they manage traffic for numerous products and millions of customers, from individual websites to major enterprises. This team is at the heart of Cloudflare's mission to make the internet faster, safer, and more reliable.
Role Responsibilities
As a member of the team you will build and extend various traffic management and supporting systems. You will work closely with Network Engineering, Product Engineering, Network Strategy, and other teams to collaborate on ambitious initiatives to make the best use of Cloudflare's global network.
You will participate in all stages of the software development lifecycle: from designing and documenting systems, to writing code and automated tests, to planning, managing, and monitoring production software deployments. You will work with a wide range of technologies and programming languages, including Go, Python, Rust, eBPF, ClickHouse, Salt, PostgreSQL, Prometheus, Kubernetes, and more. You will use AI-powered tools and systems as part of your daily workflow to analyze and extend codebases, introspect production systems and datasets, and accelerate problem-solving.
Our team at Cloudflare operates under a "Run What You Build" model. This means we are responsible for the health of our systems and actively participate in our team's on-call rotation as part of our operational duties.
Because you'll be solving problems of massive scale and significance, and shaping the future of reliability and performance on the Internet, you are a growth-oriented individual who enjoys being outside of your comfort zone. You are comfortable in a fast-paced but sensible work environment. You value curiosity and empathy and lead with these values.
Role Requirements
Must-Have Skills
Bonus Points
Role Summary
The Traffic Management is responsible for the systems that dynamically route traffic flows into, through, and from Cloudflare's global network.
We don't just manage one company's traffic; they manage traffic for numerous products and millions of customers, from individual websites to major enterprises. This team is at the heart of Cloudflare's mission to make the internet faster, safer, and more reliable.
Role Responsibilities
As a member of the team you will build and extend various traffic management and supporting systems. You will work closely with Network Engineering, Product Engineering, Network Strategy, and other teams to collaborate on ambitious initiatives to make the best use of Cloudflare's global network.
You will participate in all stages of the software development lifecycle: from designing and documenting systems, to writing code and automated tests, to planning, managing, and monitoring production software deployments. You will work with a wide range of technologies and programming languages, including Go, Python, Rust, eBPF, ClickHouse, Salt, PostgreSQL, Prometheus, Kubernetes, and more. You will use AI-powered tools and systems as part of your daily workflow to analyze and extend codebases, introspect production systems and datasets, and accelerate problem-solving.
Our team at Cloudflare operates under a "Run What You Build" model. This means we are responsible for the health of our systems and actively participate in our team's on-call rotation as part of our operational duties.
Because you'll be solving problems of massive scale and significance, and shaping the future of reliability and performance on the Internet, you are a growth-oriented individual who enjoys being outside of your comfort zone. You are comfortable in a fast-paced but sensible work environment. You value curiosity and empathy and lead with these values.
Role Requirements
Must-Have Skills
- Minimum of 6 years of engineering experience with networking and/or distributed systems.
- Systems-level programming experience in Go, Python, Rust, C, or C++.
- Strong knowledge of networking protocols in Layers 3 and 4 of the OSI Model.
- Knowledge of HTTP, TLS, and CDN networks.
- Experience in implementing secure and highly-available distributed systems.
- Strong ability to debug issues in complex systems.
- Strong collaboration and communication skills across teams and functions.
- Experience participating in an on-call rotation.
- Willingness to adopt and integrate AI tools and systems into your engineering workflow.
Bonus Points
- Experience building or developing capabilities in the domain of traffic engineering including automated load balancing and traffic prioritization.
- Knowledge of statistical-analysis techniques and control theory.
- Knowledge of TCP/IP and Internet routing.
- Experience building tools and APIs.
- Experience using AI-assisted development tools (e.g., code completion, codebase analysis, log/data exploration) in a professional setting.
Cloudflare Austin, Texas, USA Office
405 Comal St, Austin, TX, United States, 78702
Similar Jobs at Cloudflare
Cloud • Information Technology • Security • Software • Cybersecurity
Lead the implementation of a global payroll system (Workday to ADP) across 16 countries. Manage team, ensure data integrity, and coordinate cross-functional collaboration.
Top Skills:
AdpAi AutomationExcelGoogle SheetsWorkday
Cloud • Information Technology • Security • Software • Cybersecurity
The Business Development Representative focuses on generating sales pipeline by engaging with customers, delivering excellent experiences, and qualifying leads for Cloudflare's sales team.
Top Skills:
OutreachSalesforce
Cloud • Information Technology • Security • Software • Cybersecurity
The Sr. Website Data Analyst leads web analytics and data insights to improve user experiences, driving personalization and experimentation through deep analysis.
Top Skills:
Adobe AnalyticsBigQueryGoogle Analytics 4Looker StudioMarketoPythonRSalesforceSnowflakeSQLTableau
What you need to know about the Austin Tech Scene
Austin has a diverse and thriving tech ecosystem thanks to home-grown companies like Dell and major campuses for IBM, AMD and Apple. The state’s flagship university, the University of Texas at Austin, is known for its engineering school, and the city is known for its annual South by Southwest tech and media conference. Austin’s tech scene spans many verticals, but it’s particularly known for hardware, including semiconductors, as well as AI, biotechnology and cloud computing. And its food and music scene, low taxes and favorable climate has made the city a destination for tech workers from across the country.
Key Facts About Austin Tech
- Number of Tech Workers: 180,500; 13.7% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Dell, IBM, AMD, Apple, Alphabet
- Key Industries: Artificial intelligence, hardware, cloud computing, software, healthtech
- Funding Landscape: $4.5 billion in VC funding in 2024 (Pitchbook)
- Notable Investors: Live Oak Ventures, Austin Ventures, Hinge Capital, Gigafund, KdT Ventures, Next Coast Ventures, Silverton Partners
- Research Centers and Universities: University of Texas, Southwestern University, Texas State University, Center for Complex Quantum Systems, Oden Institute for Computational Engineering and Sciences, Texas Advanced Computing Center

