Senior Design Engineer (Founding Engineer) - TikTok
Core
Reshape design-to-engineering workflows, build AI design tooling, and drive technical direction for TikTok's Core app, Social, and Creation verticals.
Role type
Senior IC design engineer (founding engineer)
Builds
Internal AI tooling (agents, plugins, code-generation pipelines), production-quality design system components, and new workflow prototypes.
Domain
Social media / Mobile development / AI tooling
Deliverable
production ML models
Required skills
Full-stack engineering, mobile stack expertise (iOS/SwiftUI or Android/Kotlin/Compose), AI coding agents (Cursor, Claude Code), product thinking, complex problem solving, founding/early-team experience
Preferred skills
Design-engineering background, open source contributions, cross-platform frameworks (Lynx), social/creator product experience
Technologies
Swift, SwiftUI, Kotlin, Compose, Cursor, Claude Code, Lynx
Responsibilities
Partner with designers and engineers to identify and close handoff friction; run parallel feasibility tracks for new workflows; lead integration of design-delivered code into mainline codebase; architect and ship internal AI design tooling; partner on architecture and design system evolution.
Seniority
Senior, hands-on IC
