Flexion Robotics

Flexion Robotics AG is a Zurich-based robotics software company developing an autonomy stack for humanoid robots that spans command, control, manipulation and locomotion across different hardware platforms and tasks. Rather than building robot bodies, the company positions itself as the intelligence layer that runs on third-party machines, using simulation and reinforcement learning so that behaviors transfer to real-world deployment with minimal human involvement.

The stack is organized in three layers. A command layer uses language models for common-sense reasoning: it ingests tasks described in natural language, decomposes them into subtasks and supplies environment understanding and grounding. A motion layer is built around a vision-language-action model trained primarily on synthetic data and fine-tuned for real-world edge cases; given images, 3D perception and an LLM-produced instruction, it proposes short-horizon, collision-aware local trajectories. A control layer provides transformer-based, low-latency whole-body control with a modular skill library for rapidly composing new behaviors. The company argues this modular design avoids brittle end-to-end monoliths and improves generalization by keeping interfaces clean and testable, and follows an asymmetric data strategy that relies on simulation and synthetic data wherever possible while selectively adding real data to close specific gaps.

The company operates from Affolternstrasse 42 in Zurich and 1004 Treat Avenue in San Francisco, and is hiring across AI engineering, product and forward-deployed engineering roles in both locations.