At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code.

Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.

Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up.

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.

You will establish technical direction, make uncertainty and trade-offs explicit, and help other engineers succeed while remaining hands‑on. Chromium and C++.

Systems programming: Rust. Go, TypeScript, Cloudflare Workers, Nomad, and Consul.

Remote rendering and streaming: TypeScript, WebAssembly, and WebGL. 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. 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.

Strong production C++ proficiency, including memory and resource ownership, concurrency, and debugging in substantial codebases.

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 Prior Browser

Isolation or Cloudflare experience is not required. Low‑latency streaming, graphics, remote computing, or other real‑time systems.

Experience using Rust for systems programming or distributed services. Go or TypeScript; Production observability, capacity planning, incident response, or build and release infrastructure. Estimated annual salary of 150,000 - 206,000 CAD Equity This role is eligible to participate in Cloudflare’s equity plan.

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! Medical/Rx Insurance Dental Insurance Flexible Spending Accounts Commuter Spending Accounts On‑demand mental health support and Employee Assistance Program Global Travel Medical Insurance Short and Long Term Disability Insurance ~ Life & Accident Insurance ~401(k) Retirement Savings Plan ~ Flexible paid time off covering vacation and sick leave Leave programs, including parental, pregnancy health, medical, and bereavement leave We’re not just a highly ambitious, large‑scale technology company.



We’re a highly ambitious, large‑scale technology company with a soul.

Fundamental to our mission to help build a better Internet is protecting the free and open Internet.

Project Galileo

Since 2014, we've equipped more than 2,400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks that would otherwise censor their work, technology already used by Cloudflare’s enterprise customers--at no cost.

Athenian Project In 2017, we created the Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free, so that their constituents have access to election information and voter registration. Since the project, we've provided services to more than 425 local government election websites in 33 states. We released 1.1.1.1 to help fix the foundation of the Internet by building a faster, more secure and privacy‑centric public DNS resolver.

This is available publicly for everyone to use - it is the first consumer‑focused service Cloudflare has ever released. Here’s the deal - we don’t store client IP addresses never, ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers.

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. S. export control laws, including the U.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.We are committed to providing equal employment chance 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. Cloudflare provides reasonable accommodations to qualified individuals with disabilities.

Examples of reasonable accommodations include, but are not limited to, changing the application process, providing documents in an alternate format, using a sign language interpreter, or using specialized equipment.

📌 Senior Systems Engineer, Browser Isolation (Toronto)
🏢 Cloudflare
📍 Toronto