Senior Systems Engineer, Browser Isolation

Available Locations: Austin, TX (US), Lisbon (Portugal), London (UK)

About the team

Cloudflare Browser Isolation runs web content in remote browsers, helping protect users from threats while preserving a responsive browsing experience. Our team builds the Chromium-based browsing engine, remote rendering and streaming technology, and distributed services that manage browser sessions across Cloudflare’s global network.

You will work at the intersection of systems programming, distributed systems, and security. Engineers contribute across the product, collaborating on browser changes, service orchestration, observability, and build infrastructure.

Scope and growth

At this level, you will be accountable for outcomes across a problem area that may span several components. You will establish technical direction, make uncertainty and trade-offs explicit, and help other engineers succeed while remaining hands-on. This is an individual-contributor role; people-management experience is not required.

Technologies we use

• Browser engine: Chromium and C++.
• Systems programming: Rust.
• Distributed services and orchestration: Go, TypeScript, Cloudflare Workers, Nomad, and Consul.
• Remote rendering and streaming: WebRTC and Skia.
• Browser client: TypeScript, WebAssembly, and WebGL.

What you will do

• Lead complex, multi-component initiatives from problem definition and design through implementation, staged rollout, and measurable production outcomes.
• Design and implement changes in our Chromium-based C++ browser and the distributed services and systems components supporting remote browsing, working across Go, Rust, and TypeScript.
• Make and explain architectural trade-offs across latency, availability, resource efficiency, security boundaries, and operational complexity.
• Investigate difficult cross-layer failures and performance bottlenecks, distinguishing browser, host, network, and control-plane causes.
• Improve resilience, capacity management, observability, and release safety; define success metrics and validate results.
• Coordinate work with partner teams, surface dependencies and risks early, and guide delivery through ambiguity.
• Mentor engineers and raise the quality of code reviews, design reviews, testing, documentation, and operational practices.
• Participate in the team’s production on-call rotation after onboarding, lead technical incident investigations as needed, and drive durable corrective actions.

This role may require flexibility to be on-call outside of standard working hours to address technical issues as needed.

Desirable Skills, Knowledge, and Experience

• Strong production C++ proficiency, including memory and resource ownership, concurrency, and debugging in substantial codebases.
• A track record of independently leading complex systems or distributed-service improvements across multiple components, from an unclear problem to a reliable production outcome.
• Strong Linux/UNIX and networking fundamentals, with experience diagnosing correctness, latency, and resource-consumption issues using profiling and operational evidence.
• Experience designing and operating distributed systems, with sound judgment about service boundaries, data partitioning, consistency, timeouts and retries, backpressure, capacity limits, and recovery from partial failures.
• Experience designing safe rollout and recovery strategies and maintaining production software over its lifecycle.
• Ability to communicate trade-offs clearly, align stakeholders, mentor teammates, and improve engineering practices through constructive feedback.
• A willingness to work across C++, Rust, Go, and TypeScript and learn unfamiliar parts of the stack.

Bonus Points

These are preferred qualifications, not prerequisites. Prior Browser Isolation or Cloudflare experience is not required.

• Browser engines, Chromium, browser sandboxing, or security-sensitive systems.
• Low-latency streaming, graphics, remote computing, or other real-time systems.
• Container and workload orchestration, including Nomad or Kubernetes, and service discovery.
• Experience using Rust for systems programming or distributed services.
• Go or TypeScript; WebRTC, Skia, WebAssembly, or WebGL.
• Production observability, capacity planning, incident response, or build and release infrastructure.

Compensation

For Portugal based hires: Estimated annual salary is between €66,000 - €91,000.

The final offer will be inclusive of time exemption, in alignment with the applicable law and collective bargaining agreements.

Benefits

Cloudflare offers a complete package of benefits and programs to support you and your family. Our benefits programs can help you pay health care expenses, support caregiving, build capital for the future and make life a little easier and fun! The below is a description of our benefits for employees in the United States, and benefits may vary for employees based outside the U.S.

Health & Welfare Benefits

• Medical/Rx Insurance
• Dental Insurance
• Vision Insurance
• Flexible Spending Accounts
• Commuter Spending Accounts
• Fertility & Family Forming Benefits
• On-demand mental health support and Employee Assistance Program
• Global Travel Medical Insurance

Financial Benefits

• Short and Long Term Disability Insurance
• Life & Accident Insurance
• 401(k) Retirement Savings Plan
• Employee Stock Participation Plan

Time Off

• Flexible paid time off covering vacation and sick leave
• Leave programs, including parental, pregnancy health, medical, and bereavement leave

What Makes Cloudflare Special?

Please note that applicants who progress to the offer stage of the interview process may be asked to attend an in-person interview within one of the Cloudflare Offices or Cloudflare Hubs. More details about this will be available at that stage of the interview process.

This position may require access to information protected under U.S. export control laws, including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license.

Cloudflare is proud to be an equal opportunity employer. We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness. All qualified applicants will be considered for employment without regard to their, or any other person's, perceived or actual race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, age, physical or mental disability, medical condition, family care status, or any other basis protected by law.