Implement tracker blocking that stops hidden trackers on every site without slowing page loads.
Bring VPN and Personal Information Removal into the browser through the DuckDuckGo subscription.
Catch startup and responsiveness regressions automatically, so the browser stays fast as it grows.
We're DuckDuckGo, the online protection company on a mission to raise the standard of trust online. We're a remote-first team of 400+ that's been profitable since 2014, with annual revenue over $100m and a culture of trust, inclusivity, and empowered project management.
Design browser engine experiments to evaluate performance, correctness, and developer tooling.
Build engine-level prototypes for reliable programmatic interaction with dynamic web content.
Collaborate with the technical lead to assess trade-offs and shape new browser product direction.
Jobgether is an AI-powered job matching platform that connects candidates with hiring companies through skills-based screening. This role is posted on behalf of a partner company exploring browser technology with a small, technically focused team.
Write Web-Platform tests and Gecko mochitests to improve Session History coverage and correctness.
Fix test failures and bugs to improve Gecko correctness, working through code review with module owners.
Collaborate with the Firefox DOM Core team to improve the health of the Session History area.
Mozilla builds the Firefox browser and champions a healthy, open internet. It is a global, mission-driven organization known for its commitment to privacy and open source software.
You will develop and maintain a C++17 endpoint sensor across Windows, Linux and macOS, capturing telemetry while keeping system footprint minimal.
You will own engineering features end to end, work directly with customers on technical challenges, and deliver reliable, high-quality solutions.
You will use AI agents and frontier models daily to accelerate development and manage multiple major projects.
Smart Working connects skilled professionals with global teams and products for full-time, long-term remote roles. It is a remote-first company and one of the highest-rated workplaces on Glassdoor, focused on breaking down geographic barriers and supporting personal growth.
Own performance of Falcon JIT compiler for workloads, from analysis to implementation.
Design and implement optimizations in the middle end and back end, from inlining to vectorization.
Work in a distributed team of compiler experts and contribute to upstream LLVM.
Azul develops Java runtime platforms, including Azul Platform Prime with the Falcon JIT compiler. They operate as a distributed team of compiler experts focused on performance and production reliability.