Marshmallow

Applied Scientist, AI

Marshmallow

full-time

Posted on:

Origin:  • 🇬🇧 United Kingdom

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Job Level

Mid-LevelSenior

Tech Stack

SQL

About the role

  • Lead the design, development, and implementation of customer-facing AI agent solutions
  • Develop and refine conversational AI models to achieve human-equivalent performance in complex customer interactions
  • Establish and maintain robust evaluation frameworks and monitoring systems to ensure AI quality, compliance, and regulatory standards
  • Drive experimentation and iterative improvement cycles to enhance AI agent capabilities and customer experience
  • Own the end-to-end lifecycle of AI agent deployments, including prompt design, context management, and troubleshooting to optimise conversational flow
  • Collaborate closely with cross-functional teams across Product, Operations, Finance, and senior leadership, acting as a technical bridge

Requirements

  • Proven experience working with customer-facing generative AI or conversational AI solutions
  • Strong background in data science with hands-on experience deploying and evaluating machine learning or AI models, particularly large language models (LLMs)
  • Deep understanding of prompt engineering, LLM evaluation, and agentic AI systems
  • Experience working with or integrating third-party AI platforms (e.g., Sierra) and collaborating with external technology partners
  • Solid SQL skills for data querying and analysis to support model evaluation and experimentation frameworks
  • Excellent communication skills with the ability to translate complex technical concepts to non-technical stakeholders and senior leadership
  • Comfortable navigating ambiguity and designing thoughtful experimentation frameworks to iterate and improve AI-driven customer journeys