LLM Applications Engineer
At a glance
Mid-level AI Engineering role at Uncountable Inc. New York, San Francisco, Munich or London · full-time · $125,000–$160,000 base.
aimlroles summary, based on the employer's posting.
What you'll do
- Build AI features that let scientists question, inspect and visualize complex experimental datasets
- Connect language models to SQL databases and analysis engines so their answers stay grounded in data
- Design and scale the systems behind retrieval, agent workflows and data pipelines for production AI
- Develop full-stack features across the platform’s AI services and user-facing interface
What you bring
- At least two years building full-stack web applications as a software developer
- Hands-on experience with an LLM orchestration framework such as LangChain, LlamaIndex or another listed option
- You can work in Python and JavaScript or TypeScript across backend services and the React interface
- You have worked on API design, asynchronous jobs and improving application performance
Who this fits
This mid-level, hybrid role suits an engineer comfortable working across AI backends and web interfaces. You’ll build production LLM systems and scientist-facing features.
From the employer
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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