Data Scientist - LLMs

About the role

As a Data Scientist , you will join the AI Models team at VTEX CX Platform , a business unit of VTEX. You will be responsible for researching, developing, and improving machine learning models that power our conversational agents and multi-agent systems. You are driven by curiosity and impact, transforming complex data into tangible improvements in user experience and product performance.

Responsibilities

• Research, design, and implement machine learning models to improve the performance of conversational agents and multi-agent systems.
• Analyze large datasets to extract insights that guide model improvements and product decisions.
• Work closely with engineers and product managers to bring AI models from prototype to production.
• Continuously evaluate model performance and iterate based on real-world usage and feedback.
• Perform exploratory data analysis (EDA) to uncover hidden structures, anomalies, and relationships in data, informing hypothesis generation and experimental design for conversational AI systems.

Requirements

• Strong foundation in Statistics.
• Proficiency in Python.
• Experience using Git for code version control.
• Hands-on experience with scikit-learn, pandas, and other data-related frameworks.
• Knowledge of Deep Learning.
• Experience with cloud platforms (AWS) for storage, pipelines, and deployment.
• Monitoring performance, drift, and data quality in production.
• Critical thinking, curiosity, and proactive problem-solving.
• Clear communication (oral, written, and visual) and collaborative teamwork.
• Familiarity with GenAI/LLMs (prompt engineering, fine-tuning, hallucination evaluation).
• Bachelor's degree in Computer Science, Engineering, Statistics, Mathematics, or related fields.
• About VTEX
• At VTEX, you will work in a challenge-driven environment and collaborate with amazing peers. If you are powerful individually, join us, and we will be unstoppable together.
• About VTEX CX Platform
• VTEX CX Platform is a business unit of VTEX dedicated to enterprise customer experience solutions powered by artificial intelligence, designed for brands and retailers.
• With the VTEX CX Platform, we redefine sales and post-sales journeys through hyperautomation and the smart integration of data into conversational channels, delivering faster, more personalized, and more efficient experiences for consumers.

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