Staff / Principal Machine Learning Engineer, Serving - Switzerland

About the Position

Staff / Principal Machine Learning Engineer, Serving - Switzerland

Inworld is a research lab of top researchers and engineers, building the world’s top-ranked realtime voice models. Our models are the #1 ranked realtime voice models in the world and are used to power the largest consumer-facing AI applications across various categories. We’ve raised more than $125M from top-tier investors and have been recognized by CB Insights as one of the 100 most promising AI companies globally.

We are looking for a Staff / Principal Machine Learning Engineer to join our team in Switzerland. This role is fully remote within Switzerland.

Responsibilities

• Optimize realtime voice models for high performance and scalability.
• Develop and implement advanced inference techniques.
• Collaborate with cross-functional teams to ensure seamless integration and deployment of models.
• Contribute to the development of state-of-the-art AI applications.

Requirements

• Inference Optimization: Deep understanding of modern serving frameworks and techniques.
• Model Acceleration: Hands-on experience with quantization, distillation, caching strategies, continuous batching, paged attention, and speculative decoding.
• High-Performance Systems: Proficiency in C++, CUDA, Rust, or highly optimized Python.
• Distributed Systems & Scaling: Experience with Kubernetes, Ray, custom load balancing, multi-GPU/multi-node inference, and handling thousands of concurrent connections.
• Public work: Non-trivial systems programming projects, open-source contributions, or technical write-ups.
• Full-cycle ownership: Ability to take a model from research to production.
• Background: PhD in CS, Physics, Math, or equivalent practical experience.
• Professional fluency in English: Required for daily collaboration with US-based teams.

Who Thrives Here

• Comfortable with ambiguity and building your own roadmap.
• Bias for impact over theoretical optimizations.
• Obsessed with understanding the "why" behind every decision.
• Thrives on deep context and fundamental logic.

We Offer

• Remote work within Switzerland.
• Full-time, permanent employment.
• Employment via Employer of Record (EOR).
• Potential U.S. visa and relocation support for future relocation to the San Francisco Bay Area.

About the Company

Inworld is a leading AI research lab, recognized globally for our innovative realtime voice models. Our technology powers experiences for companies like NVIDIA, Microsoft Xbox, Niantic, and more. Join us to make a significant impact in the AI field.

Apply now to be part of our dynamic team!