Frontend Engineer Full Time

To be considered for this role, please apply directly through LinkedIn. We're unable to review applications sent by email.Rilian is building Caspian, an event-driven agentic platform that powers next-generation AI and defense applications, designed for environments where access control and resilience matter. This role is on the team building Meridian, our canvas workspace. It's an infinite, agent-driven surface where an operator works alongside agents on a shared board of live, interactive content. It's the surface where the platform stops being an API and becomes something a person works in. We're looking for a Senior Frontend Engineer to help own and grow it. Rendering performance on a canvas that mixes ordinary DOM with WebGL-backed content, at boards large enough that naive approaches fall over. The interaction model for working with agents on the canvas, which is as much new design as it is engineering.js (App Router) and React 19 in TypeScript. Pixi.js for WebGL, ArcGIS for maps. Six or more years building production frontends, with real depth in React and TypeScript. You should know how React actually behaves, not just how to use it. Performance work you've done yourself. Pixi, Three, raw WebGL, or a 2D canvas app you took seriously. Clear writing. GIS or mapping work Event sourcing, CRDTs, or collaborative editingAI-native product surfaces Defense, regulated, or otherwise access-controlled environments You care about how software feels to use, and you'll do unglamorous performance work to get there. To be considered for this role, please apply directly through LinkedIn. We're unable to review applications sent by email.