C/C++ Engineer

Phinomenon is built by browser and cloud veterans — our founders behind FydeOS (a Chromium-based OS trusted by millions) and QingCloud (one of China's earliest API-first IaaS platforms founded in 2012). Fresh off a healthy, eight‑figure Series A raise, we've got the cash runway one needs to dream big without panicking about next week's payroll. With folks working from San Francisco, London, Beijing, Shanghai and Shenzhen, we're proudly global and friendly to your time zone, with overlapping hours so we can all actually talk. We ship fast and ship hard — but burnout is so last decade, so we bake in wellness stipends, mandatory recharge days and flexible schedules, because great code comes from healthy lives. If you want to build the nextgen browser that actually, you know, gets you — while still enjoying your evenings and maintaining upright posture — welcome home.

As a C/C++ Engineer at Phinomenon, you'll work directly with the Chromium source code, contributing to rendering pipelines, performance optimisations, and AI model integrations. You'll collaborate with browser, AI, and infrastructure teams to push features from code to execution, ensuring our browser is fast, reliable, and scalable at every level.

• Contribute to Chromium internals — rendering engine, IPC, networking, and memory management
• Integrate AI-powered components and protocol hooks within Chromium's existing architecture
• Optimize code paths for performance, latency, and resource usage at scale
• Debug cross-platform issues across Windows, Linux, macOS
• Participate in code reviews, refactorings, and maintaining test coverage
• Collaborate closely with QA to automate testing and build continuous integration pipelines
• Help land build integrations, packaging, sandboxing, and platform compliance

• 4+ years professional experience in modern C++ with strong system-level coding
• Deep understanding of multi-process architecture, IPC, memory management, and concurrency
• Experience with performance profiling, debugging (gdb/lldb/Perf), and CI tools
• Comfortable with cross-platform development across Windows, macOS, and Linux
• Self-driven, detail-oriented, and skilled in collaborating in a remote-first team

• Proven experience navigating and modifying the Chromium (or Blink/WebKit) codebase
• Background in building browsers, extensions, or Electron apps
• Familiarity with AI/ML model integrations or inference engines in native code
• Knowledge of networking protocols (TCP/UDP/QUIC) or custom protocol stacks
• Exposure to sandboxing, security hardening, or custom build systems