AI Developer
Full Time / Freelance
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.
Salary: 54.000 – 61.000 DKK. (Depending on qualifications)
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.