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LLM Applications Engineer

Uncountable

San Francisco, CAHybridFull-time$125–160K/yrPosted 5mo agoVerified open 4 days ago
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At a glance

Compensation
$125–160K/yr
Location
San Francisco, CAHybrid
Schedule
Full-time
Work Authorization
Not specified

Requirements

Credentials this posting asks for.

Bachelor's degree

Job overview

Uncountable is hiring a LLM Applications Engineer. Uncountable is seeking experienced engineers to lead the transformation of its platform into an AI‑first R&D ecosystem, building next‑generation tools that empower scientists at Fortune 500 companies to accelerate discovery through generative AI. The LLM Applications Engineer will architect LLM infrastructure, design retrieval systems, agentic workflows, and data pipelines that connect complex experimental data with actionable AI insights.

Key focus areas include Design and build LLM infrastructure and user‑facing AI features for the Uncountable Web Platform., Develop intuitive AI‑driven UI components that enable scientists to query, analyze, and visualize complex experimental datasets., and Integrate LLM capabilities with core SQL databases and data analysis engines to ensure high‑fidelity, grounded AI responses..

Successful candidates bring 2+ Years Of Software Development Experience With Focus On Full-Stack Web Applications. Important skills include RAG Pipelines, Vector Databases, Prompt Management Systems, AI-Driven UI Components, LLM Orchestration Frameworks, and LangChain. Preferred (not required): LLM Evaluation, SQL, Product Mindset, and Flask.

Skills & qualifications

RequiredNice to have

Skills

RAG PipelinesVector DatabasesPrompt Management SystemsAI-Driven UI ComponentsLLM Orchestration FrameworksLangChainLlamaIndexHaystackPythonJavaScriptTypeScriptAPI DesignAsynchronous ProcessingPerformance OptimizationLLM EvaluationSQLProduct MindsetFlaskPostgreSQLReactReduxSassFull-Stack Web Development

Qualifications

2+ Years Software Development ExperienceB.S. In Computer Science or Related Technical FieldExperience With LLM EvaluationFamiliarity With SQL

Benefits

Medical Insurance
Dental Insurance
401(k) Match

Full job description

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.

  • 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: $125K–$160K + 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

Agentic Coding

Development at Uncountable has changed dramatically due to the introduction of LLM's. Read more about our practices at:

https://engineering.uncountable.com/coding

We're excited for you to build the future of development with us.

What's next? Learn more about Interviewing at Uncountable

Learn more about our engineering team: Check out our blog

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