Das ist der Job
Our Mission
Aleph Alpha is one of the few companies in Europe doing serious foundation model pre-training.
Darum lohnt es sich
We’re growing our pre-training team and hiring someone to passionately work on data: defining what goes into our models, building the systems that source and prepare it, and ensuring our training team has the highest-quality data to push model capabilities forward.
Team culture
At Aleph Alpha, we foster a culture built on ownership, autonomy, and empowerment. Teams and individual contributors are trusted to take responsibility for their work and drive meaningful impact.
Our customers – in finance, manufacturing, public administration – need models that understand German, meet European regulatory requirements, and work reliably in high-stakes settings. We’re building that in Heidelberg.
We maintain a flat organizational structure with efficient, supportive management that enables quick decision-making, open communication, and a strong sense of shared purpose.
About the Role
As a Senior AI Engineer in Pre-training Data, you will work across the full stack of data preparation – from sourcing and acquisition to processing, filtering, and mixture design.
Some weeks you’ll be deep in data quality analysis, understanding what makes a corpus valuable and how its composition affects downstream performance on public and bespoke evaluation tasks. Other weeks you’ll be optimising large-scale processi
