Principal AI Engineer

Location: Berlin, Germany (Hybrid)

Type: Full-time

Salary: up to €120,000

About U

sWe’re working with a fast-scaling AI company based in Berlin, on a mission to redefine how intelligent systems integrate into everyday business operations. Fresh off the back of a €10M Series A round led by top-tier investors, they are entering an ambitious phase of product expansion and R&D acceleration

.
Their team combines top talent from leading AI labs, startups, and global tech companies. They're building advanced AI infrastructure and applications that push the limits of performance, scalability, and interoperability, all while keeping ethics and usability at the cor

e.
If you’re looking for a role where you’ll shape core architecture, guide strategic decisions, and pioneer cutting-edge AI systems, this is

it.
The

RoleAs a Principal AI Engineer, you’ll lead the development of state-of-the-art AI systems, working closely with research, product, and engineering teams. You’ll design and deploy scalable machine learning pipelines, lead architecture for generative and retrieval systems, and mentor a team of talented engineers and applied scienti

sts.
This isn’t a maintenance role, it’s about inventing, optimizing, and operationalizing at scale. You’ll make key decisions on model selection, infrastructure, and system design that will define how our AI evolves over the next several y

ears.

Key Responsib

• ilitiesDesign and implement large-scale AI and ML systems — from model architecture to distributed training and deployment in prod
• uction.Collaborate with research teams to translate cutting-edge findings into robust, scalable applic
• ations.Architect and optimize data pipelines, ensuring efficient preprocessing, feature extraction, and real-time inf
• erence.Drive experimentation in foundation model adaptation, fine-tuning, and evaluation across multi-modal data (text, vision,
• audio).Mentor and lead senior engineers and applied scientists, fostering a culture of technical excellence and inno
• vation.Own performance, reliability, and scalability of AI models in prod
• uction.Partner with product leadership to align technical roadmap with business priorities and customer

needs.
Requ

• irements10+ years of experience in software engineering, with at least 5 years specialized in machine learning or AI
• systems.Proven experience designing and scaling ML infrastructure, model training, deployment, and monitoring in production envir
• onments.Deep expertise in Python, PyTorch/TensorFlow, and experience with distributed systems (Ray, Kubernetes, Spark
• , etc.).Track record of leading end-to-end AI system architecture, from data ingestion to inference
• serving.Strong grounding in ML theory, deep learning, and MLOps best pr
• actices.Experience working with large language models (LLMs) or multi-modal AI is highly de
• sirable.Previous experience at a startup or scale-up is a plus, you thrive in ambiguity and build with v

elocity.
Wh

• y Join UsBe part of a high-impact engineering team shaping the AI backbone of a rapidly growing European tech
• company.Collaborate with world-class researchers and e
• ngineers.Competitive compensation, stock options, and the chance to have a foundational impact on a product used
• globally.A modern, collaborative environment in the heart of Berlin, with flexibility and autonomy