LLM Applications Engineer

UncountableSan Francisco, NY
Hybrid

About The Position

Uncountable is seeking experienced engineers to lead the transformation of our platform into an AI-first R&D ecosystem. We are building the next generation of tools that empower scientists at Fortune 500 companies to accelerate discovery through Generative AI. As an LLM Applications Engineer, you will be the architect of our LLM infrastructure. You won't just be building interfaces; you will be designing the retrieval systems, agentic workflows, and data pipelines that bridge the gap between complex experimental data and actionable AI insights. Your work will directly modernize how the world’s leading researchers interact with their data.

Requirements

  • 2+ years of software development experience with a focus on full-stack web applications.
  • Proven experience with LLM orchestration frameworks (e.g., LangChain, LlamaIndex, or Haystack).
  • Proficiency in Python and JavaScript/TypeScript: Ability to work across the AI backend and the React frontend.
  • Solid Engineering Fundamentals: Experience with API design, asynchronous processing, and performance optimization.

Nice To Haves

  • B.S. in Computer Science or a related technical field.
  • Experience with LLM Evaluation: Knowledge of how to measure and mitigate "hallucinations" in a scientific/technical context.
  • Familiarity with SQL: Specifically optimizing queries that serve as the context for LLM prompts.
  • Product Mindset: A passion for creating "LLM-first" user experiences that feel seamless rather than bolted-on.

Responsibilities

  • Design, build, and scale the LLM infrastructure and user-facing AI features of the Uncountable Web Platform.
  • Implement and optimize RAG (Retrieval-Augmented Generation) pipelines, vector databases, and prompt management systems.
  • Build intuitive, AI-driven UI components that allow scientists to query, analyze, and visualize complex experimental datasets.
  • Connect LLM capabilities with our core SQL databases and data analysis engines to ensure high-fidelity, grounded AI responses.

Benefits

  • Competitive Salary and Equity
  • Health and Dental Insurance
  • 401K with Employer Contribution
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