Responsibilities
- Develop and optimize AI-driven conversational customer service models for high-volume, complex e-commerce interactions.
- Apply LLM post-training techniques such as instruction tuning, reinforcement learning from human feedback, continual learning, fine-tuning, and distillation.
- Construct specialized training datasets and benchmarks for policy clarification, dispute resolution, and multi-turn complaint handling.
- Develop multilingual customer support, machine translation, and cross-lingual dialogue capabilities.
- Create automated dispute-resolution and policy-adaptive AI systems that verify transaction details and support platform compliance.
- Define response-quality metrics and use A/B testing and iterative optimization to improve AI-generated interactions.
- Build AI-powered seller assistance tools for customer inquiries, store operations, and dispute resolution.
- Optimize model compression, quantization, inference, distributed training, and edge deployment for scalable, low-latency service.
Requirements
- Bachelor’s degree or higher in computer science, computer engineering, statistics, applied mathematics, data science, or a related discipline.
- At least 3 years of related work experience.
- Experience fine-tuning, distilling, or applying reinforcement learning to large language models for conversational AI applications.
- Proficiency in multilingual NLP, machine translation, and cross-lingual dialogue modeling.
- Preferred: understanding of e-commerce policies, dispute-resolution workflows, and merchant-buyer interactions.
- Preferred: knowledge of AI agents, retrieval-augmented generation, mixture-of-experts models, sparse attention, reinforcement learning, and inference-time scaling.
- Preferred: experience with distributed model training, low-latency inference, and edge AI for large-scale applications.
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About ByteDance
ByteDance is a global incubator of platforms at the cutting edge of commerce, content, entertainment and enterprise services - over 2.5bn people interact with ByteDance products including TikTok. Creation is the core of ByteDance's purpose. Our products are built to help imaginations thrive. This is doubly true of the teams that make our innovations possible. Together, we inspire creativity and enrich life - a mission we aim towards achieving every day. At ByteDance, we create together and grow together. That's how we drive impact - for ourselves, our company, and the users we serve. We are committed to building a safe, healthy and positive online environment for all our users. We have over 110,000 employees based in more than 30 countries globally. Join us.