Senior Fullstack Engineer (100% remote Worldwide)

Tether is pioneering a global financial revolution. You'll work across the JavaScript and TypeScript layer of our local AI stack (QVAC), contributing to both user-facing applications (mobile or desktop) and the platform layer that bridges C++ inference engines with the app ecosystem.

Responsibilities: Own React (Expo/Electron) app development with clean, modular architecture. Build UI using modern React stack (TypeScript, RN Navigation, Zustand/Recoil/Jotai). Implement local first / local only apps. Integrate mobile apps with distributed systems, local inference, and p2p layers. Implement REST/WebSockets, async flows, and secure data storage. Build native modules (iOS/Android) when needed. Write reliable code: unit tests, E2E tests (Maestro/Appium/Playwright).

Requirements: 5+ years of experience in Fullstack development. Expert-level proficiency in Node.js/JavaScript for backend development and React frontend framework. Experience with performant data handling on constrained devices (SQLite). Proven experience building and scaling distributed systems or event-driven architectures. Experience with Docker and Kubernetes. Experience with real-time data streaming and RPC implementations.

Nice to have: Experience with peer-to-peer technologies (Hyperswarm, libp2p, WebRTC). Familiarity with AI/ML inference APIs. Knowledge of GPU resource management and ML framework infrastructure. Understanding of WebAssembly or edge computing paradigms.