138K–217K USD / year
Staff Software Engineer, Browser (New Products)
OtherRemote — United States
Published on 2026-11-10
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About this role
Build and evaluate browser-engine experiments for new applications of browser technology, including reliable programmatic interaction with web content. This hands-on individual contributor role focuses on engine-level implementation, performance and correctness measurement, and informing technical direction.
About the company
Mozilla builds open-source products and technologies, including Firefox, that prioritize privacy, security, and an open internet.
Stack
C++RustJavaScriptGeckoServoBlinkWebKit
What you'll do
- Design and implement experiments in browser-engine subsystems.
- Evaluate efficient, accurate ways to represent and expose browser state.
- Prototype engine capabilities for programmatic interaction with web content.
- Instrument and measure browser behavior for performance and correctness.
- Profile overhead and optimize changes based on reproducible measurements.
- Use AI coding tools and verify their output through debugging, tests, and measurement.
What we're looking for
- Deep hands-on expertise in at least one browser-engine subsystem and experience implementing substantial changes.
- Strong C++ or Rust skills and experience navigating large systems codebases.
- Practical knowledge of memory ownership, concurrency, object lifetimes, and performance debugging.
- Strong web-platform and compatibility knowledge across document structure, scripts, rendering, and interaction.
- Ability to investigate unfamiliar code, form hypotheses, build prototypes, and interpret results.
- Experience with profiling, tracing, regression tests, or conformance tests.
- Curiosity about AI agents and willingness to work with agent harnesses and coding tools.
Nice to have
- Contributions to a browser engine such as Gecko, Servo, Blink, or WebKit.
- Experience maintaining an open-source project.
- Technical leadership on a small new-product team.
- Experience with accessibility infrastructure, browser security, profiling, or automated agent-workflow evaluation.
Benefits
- Performance-based bonus plan.
- Medical, dental, and vision coverage.
- Retirement contributions with immediate vesting.
- Quarterly company wellness days and well-being stipend.
- Country-specific holidays and a birthday day off.
- One-time home-office stipend and annual professional-development budget.
- Paid parental leave.