We are looking for a Fullstack Engineer with experience in LLMs to help build and ship production-grade software and workflows for clients in the US and Europe.

You’ll work across the stack – from frontend to backend and model integration – collaborating closely with product leads and other engineers to turn ideas into working systems.

This is a remote-first role, though candidates based in Vienna can also work with us in person if preferred.

• Design, develop, and deploy LLM-powered applications, including but not limited to fine-tuned models and retrieval-augmented generation (RAG) pipelines, while exploring innovative ways to enhance AI-driven workflows


• Build and maintain scalable fullstack applications using a Python or JavaScript-based stack (Node.js, React, etc.), along with applications for advanced data processing, data handling and model integration


• Prototype and refine agentic workflows using n8n and similar low-code/no-code platforms to quickly validate solutions first

• 2+ years of experience as a fullstack developer, with a strong background in JavaScript-based and Python-based technologies


• 1+ years of deep understanding of LLMs, fine-tuning, vector databases and retrieval-augmented generation (RAG), along with a strong overall interest in the AI space to stay on top of developments


• Understanding of data science principles, including data preprocessing and model evaluation


• Strong problem-solving skills and the ability to work independently


• Fluency in English

• Flexible working hours


• Remote setup or optional in-person work in Vienna, Austria


• Insight into cutting-edge AI and automation projects

Why join Waterglass?

• Opportunity to go beyond building agentic software applications – play a central role in creating AI-driven business ventures from scratch, combining technology, strategy and execution


• Work with cutting-edge AI technologies that have real-world applications, solving complex problems for both our own ventures and international clients across the US and Europe


• Join a small and fast-moving team with expertise in product, growth, and finance, where your contributions directly shape the direction of new AI-powered businesses