Senior AI Engineer

Description:

• Unzer is a leading European fintech company with a mission to simplify international payments for e-commerce and retail businesses.
• At Unzer, we are driven by the belief that customers should enjoy a seamless shopping experience, no matter where they choose to shop.
• We are a team of over 700 experts from 55 different nationalities, dedicated to creating a state-of-the-art unified commerce platform.
• Our goal is to enable businesses to delight their customers with a seamless payment experience.
• Whether you’re a tech enthusiast, payment expert, or a dedicated support professional, we are looking for individuals who are passionate about making a difference.
• Our offices: We are based across Austria, Denmark, Germany and Luxembourg with a HQ in Berlin.
• The AI Team advances intelligent automation through UnzerAI, our internal platform that helps employees, merchants, and partners discover and use information quickly and efficiently.

Requirements:

• 5+ years of Python experience focused on building robust, performant backend systems
• Hands-on with LLM frameworks (Hugging Face Transformers, LangChain) and vector databases (Pinecone, FAISS), plus experience fine-tuning models on custom data
• Solid understanding of prompt engineering techniques and retrieval-augmented generation workflows
• Proven track record deploying and operating scalable, secure services on AWS or equivalent cloud platforms
• Expertise with containerization and orchestration (Docker, Kubernetes) and serverless architectures
• Familiarity with MLOps tooling for model training, deployment, and monitoring (MLflow, Kubeflow, or similar)
• Skilled in CI/CD pipelines using GitHub Actions, Jenkins, or comparable tools
• Strong analytical mindset, excellent communication skills, and a natural ownership mentality, thriving in collaborative, fast-paced environments
• Please note that we will not sponsor your visa or relocation, and you must have a valid work permit to be eligible for this position.

Benefits:

• 🏡 Work from home up to 60% of the time. We want you to keep your work-life balance.
• 🚲 Mobility support, whether you choose a Bike or a Deutschland ticket - we’ve got you covered.
• 🫴 Explore counselling assistance, be it for professional or personal matters, through our associated platform.
• 💰 Pension scheme, we want to give back and help you secure your future.
• 🏖️ 15 days a year of workation from your desired destination within the EU.
• 🕟 Flexible working hours – you get to choose the schedule that works best for you!
• 📗 Learning budget of 1000 euros per year – you can develop your passions with us.
• 🎉 Enjoy some fun moments with your coworkers – we throw a company party once a year and host several team events!