Algorithm Engineer, TikTok E-Commerce (Conversational AI)

What you'll do

• Build and optimize AI customer-service models for inquiries, complaints, refunds, disputes, and logistics.
• Apply LLM post-training and construct specialized training data; improve response quality through evaluation and A/B testing.
• Develop multilingual support and translation, and optimize model compression, inference, and deployment at scale.

What they ask for

• Bachelor and above in computer science, computer engineering, statistics, applied mathematics, data science, or a related discipline.
• Experience fine-tuning, distilling, or applying reinforcement learning to large language models for conversational AI.
• Proficiency in multilingual NLP, machine translation, and cross-lingual dialogue modeling.

Nice to have

• Understanding of e-commerce policies, dispute workflows, and merchant-buyer interactions.
• Knowledge of AI agents, retrieval augmented generation, mixture of experts, sparse attention, reinforcement learning, inference time scaling, distributed model training, low-latency inference, or edge AI.

Tools

LLMs, NLP, RLHF, A/B testing, retrieval augmented generation, mixture of experts, sparse attention, edge AI

AI focus

Builds multilingual e-commerce customer-service and seller-assistance AI, using LLM post-training, specialized datasets, automated dispute resolution, response evaluation, translation, and efficient deployment.