· Launched a parcel waybill generating system, helping 15K+ merchants print waybills and deliver goods· Programmed to generate organized waybill IDs (batch/serial numbers, tail labels, etc) with 99.9% accuracy, achieving idempotence, atomic operations and fault recovery mechanism with TDDL/Tair (K-V cache)· Built infrastructure of order-info datasources realizing service isolation and data synchronization among multiple region units (US/CN/SG/RU) with Spring/SpringBoot/RocketMQ/HSF(RPC), supporting 10+ business lines· Released the extended version to be used by the whole Global Order Tracking team (120+ people)

· Engineered navigation features (obtaining directions, exploring nearby, etc) for voice assistants in Python· Constructed modules to recognize 100+ patterns and extract user information including starting and end points/transportation/personal preferences, by analyzing sentences and keywords using NLTK and spaCy· Implemented interaction functionality by multiple rounds of dialogue with users, generating responses intelligently and refining intents; improved user experience and increased 8% of the system accuracy