Lead Backend Development Engineer

📋 Description Develop core Java backend for high-concurrency order processing and IM messaging engines. Evolve core distributed transaction engine; integrate AI shopping assistant via LLMs. Build scalable, maintainable backend services with clean Java code. Drive architecture improvements for performance, reliability, and data consistency. Collaborate across teams to shape technology strategy and delivery. 🎯 Requirements 3–5 years Java development; strong CS fundamentals; JVM memory, GC, concurrency. Spring Boot, Spring Cloud, MyBatis. Distributed transactions and state machines; financial-grade order/settlement. Netty, WebSocket, MQTT; millions of concurrent connections. RocketMQ/Kafka; MySQL tuning; Redis distributed locks. Preferred Qualifications Work Visa: HK TTPS or QMAS or eligible candidates preferred. AI Vision: LangChain, vector databases (Milvus, Pinecone) or RAG experience. 🎁 Benefits Study Growth Fund: professional development and continuous learning. Internal Events: team-building activities and workshops. Global Collaboration: diverse, international team worldwide. Career Advancement: growth opportunities within a rapidly expanding company. Internal Mobility: long-term development with internal opportunities.