NEMO-4-PAYPAL: Leveraging NVIDIA's Nemo Framework for empowering PayPal's Commerce Agent

Sudhanshu Garg; Andrew Wang; Chaitanya Kulkarni; Ali Sahami; Farhad Farahani; Sean Yun-Shiuan Chuang; Jian Wan; Srinivasan Manoharan; Uma Kona; Nitin Sharma; Linsey Pang; Prakhar Mehrotra; Jessica Clark; Mark Moyou

arXiv · 2512.21578

NEMO-4-PAYPAL: Leveraging NVIDIA's Nemo Framework for empowering PayPal's Commerce Agent

Sudhanshu Garg·Andrew Wang·Chaitanya Kulkarni·Ali Sahami·Farhad Farahani·Sean Yun-Shiuan Chuang·Jian Wan·Srinivasan Manoharan·Uma Kona·Nitin Sharma·Linsey Pang·Prakhar Mehrotra·Jessica Clark·Mark Moyou

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Abstract

We present the development and optimization of PayPal's Commerce Agent, powered by NEMO-4-PAYPAL, a multi-agent system designed to revolutionize agentic commerce on the PayPal platform. Through our strategic partnership with NVIDIA, we leveraged the NeMo Framework for LLM model fine-tuning to enhance agent performance. Specifically, we optimized the Search and Discovery agent by replacing our base model with a fine-tuned Nemotron small language model (SLM). We conducted comprehensive experiments using the llama3.1-nemotron-nano-8B-v1 architecture, training LoRA-based models through systematic hyperparameter sweeps across learning rates, optimizers (Adam, AdamW), cosine annealing schedules, and LoRA ranks. Our contributions include: (1) the first application of NVIDIA's NeMo Framework to commerce-specific agent optimization, (2) LLM powered fine-tuning strategy for retrieval-focused commerce tasks, (3) demonstration of significant improvements in latency and cost while maintaining agent quality, and (4) a scalable framework for multi-agent system optimization in production e-commerce environments. Our results demonstrate that the fine-tuned Nemotron SLM effectively resolves the key performance issue in the retrieval component, which represents over 50\% of total agent response time, while maintaining or enhancing overall system performance.

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Sudhanshu Garg, Andrew Wang, Chaitanya Kulkarni, Ali Sahami, Farhad Farahani, Sean Yun-Shiuan Chuang, Jian Wan, Srinivasan Manoharan, Uma Kona, Nitin Sharma, Linsey Pang, Prakhar Mehrotra, Jessica Clark, Mark Moyou. 2025-12-25. NEMO-4-PAYPAL: Leveraging NVIDIA's Nemo Framework for empowering PayPal's Commerce Agent. https://arxiv.org/abs/2512.21578

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