Full Stack 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 Full Stack Engineer at Phinomenon, you'll partner with frontend, backend, and AI teams to build robust, scalable services and connected UIs for our AI-native browser. From designing microservices to crafting front-facing features, you'll ensure smooth, efficient, and clever user experiences that harness AI models behind the scenes.

• Design, build and maintain RESTful/GraphQL services and databases (SQL/NoSQL)
• Develop user-facing UIs using React/TypeScript and integrate them with backend logic
• Ensure clean, maintainable code across the stack
• Write and maintain API documentation and client SDKs
• Build CI/CD pipelines, including testing, deployments, monitoring, and maintenance
• Debug and profile across server and client platforms to optimize performance
• Collaborate across teams — product, design, AI, and infra — to ship user-centric features

• 4+ years in full-stack or backend-driven development roles
• Strong backend experience (Node.js/Go/Python/Java) with frameworks and API design
• Proficient in front-end frameworks (React, Vue, Angular) and TypeScript/JavaScript
• Database skills: schema design, querying, indexing, caching for relational or NoSQL systems
• Experience building and testing REST/GraphQL endpoints
• Skilled in writing automated tests (unit/integration/end-to-end)
• Experience with containerization (Docker/K8s), cloud platforms, and CI/CD tooling
• Solid debugging, code profiling, and performance tuning
• Comfortable with remote teamwork, code reviews, and mentorship

• Experience working directly on Chromium source or browser-engine integrations
• Built AI-powered services or applications, especially with LLMs/ML-backends
• Knowledge of microservices, event-driven architectures, or streaming systems
• Familiarity with observability (Prometheus, Grafana, OpenTelemetry)
• Open-source contributions or developer tooling/SDK experience