Senior React/JavaScript UI Developer

Concept Plus is a mission-focused technology solutions provider that transforms IT concepts into impactful solutions for federal agencies. Headquartered in Fairfax, VA, we bring the agility, responsiveness, and customer intimacy of a small business combined with the quality and infrastructure of a larger firm.

Recognized as an award-winning Oracle partner, we have delivered innovative solutions across Defense, Intelligence, Civilian, Health IT, and Tribal sectors. Our highly certified experts build systems that drive efficiency, accelerate modernization, and ensure mission outcomes with certainty.

We offer competitive pay, comprehensive health, dental, and vision insurance, paid life insurance, paid time off, 11 paid holidays, performance bonuses, tuition reimbursement, unlimited training, and the opportunity to thrive in a collaborative, flexible, and innovative environment.

Concept Plus is seeking a Senior React/JavaScript UI Developer to support an enterprise-scale application operating in secure client environments, including Denied, Degraded, Intermittent, and Limited (DDIL) communication conditions. This role requires deep expertise in React, Vue, Node.js, Progressive Web Applications (PWAs), and Electron-based desktop application development, along with a strong understanding of secure coding, DevSecOps pipelines, and Zero Trust architectures. You will design, build, and optimize user-facing capability for client program while supporting Tier 1–3 enhancements, defect resolution, and integration activities in a multi-vendor Agile environment.

What you'll do

• Produce and update front‑end development checklists, UI standards, and operational guides.
• Develop, optimize, and maintain complex UI components using React (hooks, context, lifecycle methods, advanced state patterns).
• Build and maintain Vue components and assist with application migration or dual‑fra