Senior - AI Engineer, NLP

MoMo is the market leader in mobile payments in Vietnam. We strive to make all transactions fast, easy and joyful. We are looking for an experienced AI Engineer to join our growing Big Data & AI team. At MoMo, we make AI/Machine Learning the core component to almost every part of the product - product recommendation, personalization, conversational AI, eKYC, risk scoring, fraud detection, promotion targeting and financial services. As a Senior AI Engineer, you will play a leading role in developing our Customer Service Chatbot system, delivering intelligent and seamless support experiences to millions of users.

Mô tả công việc

• Design, build, and optimize LLM-powered chatbot systems for customer service at scale;
• Develop and implement RAG (Retrieval-Augmented Generation) pipelines, prompt engineering strategies, and agentic workflows for domain-specific performance;
• Architect conversation flows, intent handling, and dialogue management systems that handle complex multi-turn interactions;
• Build evaluation frameworks and monitoring systems to measure chatbot quality, detect hallucinations, and ensure response accuracy;
• Collaborate cross-functionally with product, customer service operations, and engineering teams to continuously improve chatbot capabilities;
• Write production-grade code and maintain robust, scalable AI systems serving millions of users;
• Stay current with LLM advancements and evaluate new models, techniques, and tools for potential adoption.

Yêu cầu công việc

• 5+ years of experience as an AI Engineer, with at least 2 years focused on LLM applications or conversational AI systems;
• Deep understanding of LLM architectures, capabilities, and limitations (GPT, Claude, LLaMA, etc.);
• Experience building chatbot or virtual assistant systems, particularly for customer service use cases;
• Fintech domain experience is a strong plus;
• Proficiency in RAG systems, vector databases, embedding models, and prompt engineering techniques;
• Strong software engineering skills in Python. Experience with LLM tooling (LangChain, LlamaIndex, etc.);
• Experience with system design for high-availability, low-latency services;
• Familiarity with evaluation methods for generative AI systems and conversation quality metrics.