Senior Systems Engineer, Browser Isolation

Cloudflare

. Lead complex, multi-component initiatives from problem definition and design through implementation, staged rollout, and measurable production outcomes .

Posted 10/14/2026full-timeLisbon • PortugalSenior💰 €66,000 - €91,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates strong proficiency in C++ and experience with distributed systems, focusing on architectural trade-offs and performance optimization. Capable of leading complex initiatives, mentoring engineers, and improving engineering practices while ensuring production reliability and safety.

Highest-signal resume keywords

C++ ProficiencyDistributed Systems DesignLinux/UNIX FundamentalsPerformance DiagnosisMentoring Engineers

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C++GoRustTypeScriptDistributed SystemsMemory ManagementConcurrencyDebuggingProfilingOperational Evidence

Soft Skills

CommunicationStakeholder AlignmentConstructive FeedbackMentoringProblem-Solving

Tools & Technologies

ChromiumCloudflare Browser Isolation

Industry Keywords

Systems ProgrammingService BoundariesData PartitioningCapacity ManagementRelease Safety

Tech Stack

Tools & technologies

Distributed SystemsLinuxRustTypeScriptUnixC++Go

About the role

Key responsibilities & impact

Lead complex, multi-component initiatives from problem definition and design through implementation, staged rollout, and measurable production outcomes
Design and implement changes in the Chromium-based C++ browser and 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 across browser, host, network, and control-plane components
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 production on-call rotation after onboarding, lead technical incident investigations as needed, and drive durable corrective actions
Work at the intersection of systems programming, distributed systems, and security for Cloudflare Browser Isolation

Requirements

What you’ll need

Strong production C++ proficiency, including memory and resource ownership, concurrency, and debugging in substantial codebases
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
Experience diagnosing correctness, latency, and resource-consumption issues using profiling and operational evidence
Experience designing and operating distributed systems
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
Willingness to work across C++, Rust, Go, and TypeScript and learn unfamiliar parts of the stack
May require authorization to receive software or technology controlled under U.S. export laws without sponsorship for an export license

Benefits

Comp & perks

Equity plan participation
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
Short and Long Term Disability Insurance
Life & Accident Insurance
401(k) Retirement Savings Plan
Employee Stock Participation Plan
Flexible paid time off covering vacation and sick leave
Leave programs, including parental, pregnancy health, medical, and bereavement leave