Staff Software Engineer, Browser – New Products

This is a fully remote position, open to applicants in Canada.

📋 Description

• Design and execute experiments within browser engine subsystems.

• Explore how internal data structures and execution behaviors influence performance, accuracy, and developer-tool interfaces.

• Assess methods for efficiently and accurately representing and exposing browser state.

• Recognize trade-offs including information loss, implementation complexity, and compatibility with dynamic web content.

• Create prototypes of engine capabilities that facilitate reliable programmatic interactions with web content.

• Investigate the impact of document structure, layout, navigation, and event handling on correctness and performance.

• Instrument browser behavior and analyze changes against repeatable tasks.

• Measure performance and correctness, isolate the effects of each change, and document both unsuccessful and successful experiments.

• Confirm that improvements persist beyond prototype-development workloads.

• Profile the overhead incurred by new capabilities and pursue enhancements supported by measurement.

• Utilize AI tools to expedite coding and analysis, ensuring output is verified through debugging, testing, and measurement.

• Collaborate closely with the team’s technical lead as an active individual contributor.

⛳️ Requirements

• In-depth hands-on knowledge of at least one browser engine subsystem, such as DOM and Web APIs, layout and rendering, accessibility, JavaScript runtimes, or networking and process architecture.

• Strong expertise in C++ or Rust.

• Experience in navigating a large systems codebase.

• Practical understanding of memory ownership, concurrency, object lifetimes, and performance debugging.

• Ability to develop JavaScript and scripting tools necessary for exercising and measuring work.

• Proven capability to investigate unfamiliar code, formulate a precise hypothesis, create a useful prototype, and interpret the results.

• Strong grasp of web platform behavior and compatibility.

• Experience with profiling, tracing, regression tests, or conformance tests.

• A curiosity about AI agents and a readiness to work directly with agent harnesses and coding tools.

• Contributions to Gecko, Servo, Blink, WebKit, or another browser engine (preferred).

• Experience in maintaining an open-source project (preferred).

• Technical leadership experience in a small team building a new product (preferred).

• Experience with accessibility infrastructure, browser security, profiling, or automated evaluation of agent workflows (preferred).

🏝️ Benefits

• Generous performance-based bonus plans for all eligible employees - we celebrate our success as one team.

• Comprehensive medical, dental, and vision insurance.

• Generous retirement contributions with 100% immediate vesting (regardless of your contribution).

• Quarterly all-company wellness days where everyone takes a collective pause.

• Country-specific holidays plus an additional day off for your birthday.

• One-time home office stipend.

• Annual budget for professional development.

• Quarterly well-being stipend.

• Significant paid parental leave.

• Employee referral bonus program.

• Additional benefits (life/AD&D, disability, EAP, etc. - varies by country).