Fullstack Engineer (Web3)

TL;DR

Fullstack Engineer (Web3): Developing and optimizing identity and security systems, including registration, login, and an in-house AI facial recognition product for KYC verification with an accent on high-concurrency inference services, FIDO2/Passkeys, and low-latency authentication flows. Focus on balancing security strength against completion rates, implementing biometric flows, and replacing third-party vendor solutions at scale.

Location: Remote (Hong Kong)

Company

Binance is a leading global blockchain ecosystem and the world's largest cryptocurrency exchange by trading volume and registered users.

What you will do

• Design and develop login, registration, and account security applications across web and mobile clients.
• Build an end-to-end in-house AI facial recognition product for KYC verification and liveness detection.
• Implement authentication capabilities including Passkeys, FIDO2 (WebAuthn), and biometric flows.
• Develop the Node.js server-side layer, including SSR, route-level guards, and a BFF (Backend-for-Frontend) layer.
• Collaborate with AI algorithm teams to integrate model capabilities into product frontend and backend.
• Optimize user flows using funnel and event data to reduce drop-offs in verification processes.

Requirements

• 3–8 years of frontend or fullstack engineering experience with consumer-facing products.
• Deep proficiency in React 18+, TypeScript, and production Node.js experience.
• Fluent in Mandarin for effective collaboration with China-based teams.
• Effective communication in English within a distributed, cross-timezone environment.
• Strong web fundamentals (HTML, CSS, browser rendering, networking, and performance optimization).
• Experience with modular architecture, unit/E2E testing, and CI/CD.

Nice to have

• Experience in AI/computer vision or identity authentication (OAuth 2.0, OIDC, JWT).
• Experience replacing third-party vendor solutions with in-house systems.
• Knowledge of AI model engineering (RAG systems, AI Agent architecture, or computer vision integration).
• Experience with Docker, Kubernetes, and CI/CD pipelines.
• Background in finance, payments, or high-security domains.

Culture & Benefits

• Work-from-home arrangement.
• Collaboration with world-class talent in a global organization with a flat structure.
• High degree of autonomy in an innovative and fast-paced environment.
• Competitive salary and corporate benefits.
• Continuous learning opportunities in a results-driven workplace.