# Senior Software Engineer, AI/LLM

**Company:** [Bubble](https://hotfix.jobs/companies/bubble-goods)
**Location:** New York, NY
**Role:** ML Engineering
**Salary:** $201k – $261k/yr
**Experience:** 2+ years
**Skills:** LLMs, Python, TypeScript, Hugging Face, LangChain, RAG, Transformer Models, Agentic AI, Embeddings, Vector Search
**Posted:** 2025-10-23

> Builds and optimizes LLM-driven features, agentic workflows, and proprietary AI models for Bubble's visual app development platform. Requires Master's/PhD + 2+ years or 5+ years ML/software experience with transformers, RAG, and AI tools.

## Job Description

## Responsibilities
- Improve LLM reasoning & retrieval techniques to enhance Bubble's AI-powered development tools.
- Design and build agentic workflows to enable multi-step AI-driven app generation.
- Fine-tune & optimize LLMs for AI-assisted app-building workflows.
- Build and optimize proprietary AI models trained on domain-specific datasets.
- Work closely with the AI team to scale AI research into production.
- Optimize LLM performance and accuracy when interpreting and modifying applications.

## Requirements
- Master's or PhD in AI, ML, NLP, or related field + **2+ years** industry experience with LLMs, AI model optimization, NLP pipelines **OR** **5+ years** as ML or Software Engineer.
- Strong experience with **transformer models**, **retrieval-augmented generation (RAG)**, dataset curation.
- Experience with **agentic AI workflows**, chatbot-style LLM interactions.
- Understanding of **embeddings**, **vector search**, AI model evaluation.
- Proficient in **Python**, **Typescript**, **Hugging Face**, **LangChain**, Mastra.

## Tech Stack
- Frontend: **Typescript**, **SolidJS**
- Backend: **Typescript**, **Node.js**
- AI/ML: **Python**, LLM APIs (**OpenAI**, **Anthropic**), **LangChain**
- Infrastructure: **AWS**, **CDK/Terraform**, **ECS**, **Redis**, **Postgres**

## Compensation & Benefits
- Salary: **$201,000 - $261,000**
- Comprehensive health coverage, 401(k) matching, wellness stipends, flexible PTO, sabbatical program (~$20K additional value)

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