Software Engineer, CUA Control

Simular is a company focused on AI-driven automation, and they are seeking a Software Engineer to work on the control layer of their systems. The role involves developing low-level computer control mechanisms and ensuring reliable interactions across various operating systems.

What you'll do:

• Work on the low-level computer control stack: mouse/keyboard injection, screen capture, coordinate mapping, input simulation
• Implement UI element detection using accessibility APIs (AXUIElement, UI Automation), DOM/a11y trees, and visual grounding
• Help build the abstraction layer that lets our agent operate across OS platforms and application types
• Tackle reliability problems: element targeting under UI changes, window occlusion, resolution scaling, cross-app focus management
• Contribute to feedback loops: how does the agent know its action worked? How does it recover when something unexpected happens?
• Work closely with the model and planning team on the interface between intent and execution

What they're looking for:

• You've built OS-level input automation (CGEvent, SendInput, xdotool, or similar)
• You understand accessibility frameworks - AXUIElement on macOS, UI Automation on Windows, AT-SPI on Linux
• You've dealt with flaky element selectors, timing issues, resolution-dependent coordinates
• You think carefully about reliability and edge cases
• You've worked with tools like Playwright, Appium, PyAutoGUI, Hammerspoon, or similar
• Experience with screen reader internals
• Remote desktop protocols (RDP/VNC)
• Game automation
• LLM agent tool-use systems
• Mobile device automation (iOS UIAutomation / XCTest, Android UIAutomator / Accessibility)