Join a team where strategy meets creativity, and design drives real change. 

With Gneis, you’re not just joining a team. You’re stepping into a collective where we value execution, adaptability, and the beauty of transformation. Our mission is to spark change, ignite growth, and carve a path for lasting digital impact. 

In addition, you’ll have the opportunity to join our partner track – for those who want to shape not only our work, but our future. 

The Role

We’re looking for an AI Developer with hands-on experience in prompt engineering and Large Language Models (LLMs) to join our growing team. You’ll be part of an ambitious team working across disciplines to design, test, and deliver AI-powered solutions that make a real impact for products and users.

What you’ll be doing 

• Developing and optimizing prompt flows for different LLM use cases (across both open-source and closed models).

• Experimenting with fine-tuning approaches and parameter control (e.g., temperature, top-p).

• Building pipelines that integrate LLM outputs into product environments, such as SaaS tools.

• Collaborating closely with product and design teams to ensure AI-powered features deliver great user experiences.

• Evaluating and benchmarking model performance across providers (OpenAI, Claude, Mistral, etc.).

What You Bring 

• A deep understanding of LLM architecture and language modeling.

• The ability to write effective, testable, and measurable prompts.

• Hands-on experience with tools such as LangChain, OpenAI API, Hugging Face, or similar.

• Knowledge of data cleaning and context construction.

• An experimental mindset with a understanding of the value of rapid iteration and continuous improvement.

• (Bonus) Experience with embeddings, vector databases, and retrieval-augmented generation (RAG).

What We Offer

• A strategic digital agency that combines business understanding, design, and tech. 

• An ambitious team that values speed, substance, and a collaborative spirit. 

• The chance to influence projects from first spark to final product. 

• A grounded environment – just real people who care about good work. 

• The opportunity become a partner at an ambitious and growing agency. 

• We are flexible with working hours and remote work, but we expect you to be primarily physically present at the office, as we are in a formative phase of building the company. 

Start: As soon as possible.

About Gneis Agency

At Gneis Agency, we understand that the world of business and digital opportunities is constantly shifting – much like the geological processes that form gneiss rock. Our agency stands as a testament to the power of transformation — turning the raw materials of a brand, vision and business goals into beautifully structured, highly effective strategies and digital products. 

We are 6 people – but expanding.

HQ in Copenhagen, Bredgade.