Senior Data Scientist / AI Consultant | Mercer

Strong Python engineering skills in production-like environments. Hands-on experience building LLM applications end-to-end (OpenAI, HF, LangChain, Mastra AI, etc.). Experience developing AI agents and prompt engineering. Experience integrating ML/LLM workflows into applications (API, endpoints, microservices). Familiarity with SQL and working with modern data platforms (Databricks). Comfortable working with evolving tech stacks and iterative prototypes. Ability to define, measure, and improve LLM/agent performance metrics. Experience working in agile, fast-paced, or startup-style environments.

Build and refine LLM-based classification and automation workflows. Develop AI agents using frameworks such as LangChain or Mastra AI. Design, test, and optimize prompts for accuracy and reliability. Define appropriate evaluation metrics and data quality standards. Integrate LLM/ML workflows into internal applications or services. Deploy solutions through APIs, cloud endpoints, or lightweight microservices. Work with Python in a shared codebase (Git). Query and manipulate data using SQL. Collaborate with systems using TypeScript / JavaScript (Mastra AI) when needed. Work with Databricks and MongoDB for data processing. Communicate clearly with technical and non-technical colleagues.