AI Engineering Intern (d/f/m)

Every year millions of people are either filing their taxes in fear or giving up on their tax refund altogether. We're working on fixing that. Our intuitive app enables anyone, regardless of education or background, to file their taxes with newfound confidence.

Spread across Germany, Spain and the UK, the team at Taxfix Group with its brands Taxfix, Steuerbot and TaxScouts, is a compassionate group of solution-finders. We speak our minds openly, and with over 400 professionals, including tax experts, developers, and IT security experts, we're rich in ideas and voices. The group has facilitated more than 3.5 billion euros in tax refunds for its customers since its founding in 2016.

As an AI Engineering Intern, you will explore cutting-edge AI techniques to support the development of intelligent features within our products. You’ll contribute to agentic AI systems, multi-agent orchestration frameworks, LLM-powered workflows, and model fine-tuning projects. This role offers the opportunity to apply advanced research and engineering skills to real-world product challenges, while working alongside experienced engineers and product teams.

•  Collaborate with Product Managers, Data Scientists, and AI Engineers to define use cases for LLMs and multi-agent orchestration.

• Research and prototype agentic AI approaches for reasoning, planning, and decision-making in user-facing tax workflows.

• Fine-tune foundation models (LLMs and domain-specific ML models) for personalized tax assistance.

• Develop and evaluate multi-agent architectures for handling complex tasks across Taxfix products.

• Apply data science methods to analyze structured and unstructured tax-related data, driving model improvements.

• Experiment with emerging frameworks for autonomous AI agents and evaluate their performance in production-like scenarios.

• Contribute to internal documentation, demos, and knowledge-sharing sessions to spread AI innovation across the company.

• Completed a Master’s degree in Computer Science, Data Science, Artificial Intelligence, or a related field.

• Solid foundation in machine learning, natural language processing, and large language models (LLMs).

• Hands on experience with agentic AI concepts, multi-agent orchestration, and autonomous systems.

• Hands-on experience with ML frameworks such as PyTorch, TensorFlow, or Hugging Face.

• Strong understanding of data science workflows, from preprocessing to model evaluation.

• Ability to work collaboratively in a fast-paced, cross-functional environment.

• Enthusiasm for solving real-world problems with AI, especially in areas that simplify people’s financial lives.

• Experience in fine-tuning LLMs for domain-specific tasks.

• Hands on experience with AutoGen, LangGraph, CrewAI, or similar multi-agent orchestration frameworks.

• Knowledge of MLOps principles (deployment, monitoring, and scaling AI models).

• Exposure to reinforcement learning or AI planning methods.

• A chance to do meaningful, people-centric work with an international team of passionate professionals.

• Holistic well-being and yoga.

• Public transport subsidy and internet cost reimbursment.

• A monthly allowance to spend on an extensive range of services that you can use and roll over as flexibly as you like.

• 30 annual vacation days and flexible working hours.

• Plenty of opportunities to socialise as a team. In addition to internal tech meetups, our international team hosts regular get-togethers—virtually and in person when possible.

• Have a four-legged friend in your life? We’re happy to have dogs join us in the office.

Excited? So are we. Learn more about Team Taxfix on our blog and get a glimpse of our culture.

At Taxfix, we believe that incredible things happen when you have a wealth of perspectives and experiences. We're proudly committed to equal employment and development opportunities no matter your gender, race, religion, age, sexual orientation, colour, disability, or place of origin. To help mitigate any potential unconscious biases, we ask that you refrain from including your picture, age, or marital status on your CV. Let your experiences speak for themselves.

Not sure if you meet all the requirements for this role? Please apply anyway. You might bring something special to the team that we hadn't considered previously.