LLM Applications Engineer

uncountable· Engineering
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🌍 Remote📍 New York, San Francisco, Munich or LondonFullTime💰 USD 130K–175K/yr

About this role

Thank you for your interest in Uncountable Engineering!

Description

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.

Primary Responsibility

Your primary responsibility is to design, build, and scale the LLM infrastructure and user-facing AI features of the Uncountable Web Platform. This is a hybrid role requiring a deep understanding of full-stack development and the unique challenges of deploying LLMs in production.

  • Infrastructure: Implement and optimize RAG (Retrieval-Augmented Generation) pipelines, vector databases, and prompt management systems.

  • Feature Development: Build intuitive, AI-driven UI components that allow scientists to query, analyze, and visualize complex experimental datasets.

  • Integration: Connect LLM capabilities with our core SQL databases and data analysis engines to ensure high-fidelity, grounded AI responses.

Salary Range: $130K–$175K + Equity

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.

Preferred Qualifications

  • 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.

Our Current Stack

  • Backend: Flask (Python), Postgres

  • Frontend: React (Typescript), Redux, Sass

Benefits

  • Competitive Salary and Equity

  • Health and Dental Insurance

  • 401K with Employer Contribution

What's next? Learn more about Interviewing at Uncountable

Learn more about our engineering team: Check out our blog

Frequently Asked Questions

What is the salary for the LLM Applications Engineer role at uncountable?
The listed salary for this LLM Applications Engineer position at uncountable is USD 130K–175K/yr. This is a remote FullTime role.
Is the LLM Applications Engineer job at uncountable remote?
Yes, this LLM Applications Engineer position at uncountable is remote, with team members based in New York, San Francisco, Munich or London. You can work from home or anywhere in the supported regions.
Is the LLM Applications Engineer role at uncountable full-time or part-time?
This is listed as a FullTime position. It is posted as a LLM Applications Engineer role in the Engineering department at uncountable.
Which team or department does the LLM Applications Engineer at uncountable belong to?
This LLM Applications Engineer position is part of the Engineering department at uncountable. See the full job description for more information about the team structure and responsibilities.
How do I apply for the LLM Applications Engineer position at uncountable?
Click the "Apply Now" button on this page. You will be redirected to uncountable's official application portal hosted on ashby where you can submit your application directly.
When was the LLM Applications Engineer job at uncountable posted?
This LLM Applications Engineer position at uncountable was posted on Jan 19, 2026. Apply as soon as possible — early applications are often reviewed first.
LLM Applications Engineer
uncountable · 💰 USD 130K–175K/yr
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