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Senior Web Developer

Castelion • Allen, TX, US • published 2026-10-23 14:05:16.815110

Description

**Why Castelion, Why Now** Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages \- and we're building a world\-class team to turn bold ideas into real capability. This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company \- regardless of your function. **Senior Web Developer** ======================== Castelion is seeking a hands\-on Senior Web Developer to lead the architecture, development, and production readiness of the Seeker Team's internal web application. This role will unify existing tools for calibration, field testing, ML annotation and training, and Foxglove into a cohesive, intuitive product that engineers and analysts rely on throughout the day. As the application's technical owner, you will work directly with end users to understand their workflows, make large\-scale data accessible and responsive, and build reliable infrastructure that supports full\-rate hardware ...

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