Senior AI Research Engineer

We are looking for a Senior AI Research Engineer to join our AI Research Team. In this role, you’ll push the boundaries of document understanding - training advanced models from the ground up and building research prototypes and solutions that directly shape our product capabilities.

You will operate at the crossroads of cutting-edge global research and Rossum’s in-house model development, directly influencing our long-term model strategy and technical roadmap as successful ideas rapidly roll into systems used by customers at scale.

You’ll join a team of experienced researchers and engineers, tightly coupled with Product and AI Platform Teams, working in a shared monorepo to ensure fast experimentation, continuous delivery, and real customer impact.

What You'll Do

You will be a key driver of Rossum’s document understanding strategy, owning end-to-end research initiatives while shaping the long-term evolution of our models and platforms.

Key responsibilities include:

• Lead research initiatives across deep learning, NLP, computer vision, and multimodal systems — operating at the intersection of global research and in-house innovation to turn promising ideas into Rossum’s proprietary, production-ready models.
• Design and run bold experiments with a hacker mindset, rapidly prototyping while considering deployment trade-offs to deliver impact into real products — optimizing for inference cost, latency, robustness, and reliability.
• Own large-scale NLP and vision training systems, including architecture design, distributed training, in-house benchmarks, aligning key metrics with product requirements.
• Leverage top-tier research infrastructure, including clusters of high-end GPUs and large-memory machines, to run ambitious experiments at real-world scale.
• Shape Rossum’s technical roadmap by identifying high-impact research directions and driving them from concept to customer impact.
• Mentor and influence others by guiding junior researchers and leading cross-team technical discussions while documenting insights and best practices.

Who You Are

We’re looking for a seasoned researcher who brings:

• 5+ years of experience in applied ML research, ML engineering, or deep learning–driven product development.
• Strong Python skills and hands-on experience with frameworks such as PyTorch or TensorFlow.
• Scientific rigor and strategic execution, with the ability to design strong experiments and turn research ideas into scalable, production-grade systems.
• Deep insight into training NLP and vision models, including architecture design, large-scale experimentation, and deployment trade-offs.
• Ownership and curiosity, staying close to global research while driving in-house innovation end to end.

What Success Looks Like

Within 3 months:

You’ve ramped up on Rossum’s research stack and data pipelines, built strong relationships with the AI Platform and Product teams, and shipped your first meaningful improvement to a production model or evaluation framework.

Within 6 months:

You’re leading multiple research efforts end to end — running well-designed experiments, improving training efficiency or reproducibility, and influencing which ideas move forward.

Within 12 months:

You’ve delivered a major research initiative with measurable gains in accuracy, latency, or cost, and you’re helping define the next year’s research agenda and technical priorities.

Why Join Us?

At Rossum.ai, we're on a mission to revolutionize business communication by harnessing the power of AI to make document processing effortless and intelligent.

• Real ownership and strategic impact over Rossum’s core AI systems and long-term model direction.
• Highly collaborative environment within the AI Research team and close partnership with the Product, Platform, and company founders, including the CTO.
• Exceptional compute infrastructure and proprietary architectures for large-scale experimentation.
• Global customer impact through technology used daily by companies around the world.
• Experiment-driven culture with pragmatic delivery and quarterly recognition for standout research contributions.
• Inspiring workspace and full tech setup in Karlín, including a 200 m² terrace with views of Prague Castle.

Ready to make an impact in your next role as a Senior AI Research Engineer? Apply now!