后端/AI应用研发工程师-抖音支付（杭州）
Core
Build and optimize backend systems and AI applications for Douyin's payment ecosystem, ensuring stability during high-traffic events and exploring large model integrations.
Role type
Senior Backend/AI Application Engineer
Builds
Payment B/C-end modules (checkout, user platform, marketing, digital wallet), high-availability infrastructure, and AI-driven payment features
Domain
Fintech / E-commerce / Large Language Models
Deliverable
production ML models
Required skills
Java/Go/Python/C++, system architecture, database design, caching, message queues, distributed systems, high concurrency, AI application development, LLM architecture, PE engineering, data evaluation
Preferred skills
Service governance, capacity planning, Agent/RAG/LangChain implementation, 0-1 AI project setup
Responsibilities
Design and develop payment business modules, ensure system stability during major events, optimize system architecture and performance, explore and implement AI/LLM applications in payment scenarios
Seniority
Mid-level to Senior, hands-on IC