Frontend Engineer, Core Platform

Quick Facts

• Role: Frontend Engineer (Core Platform)
• Focus: Building analyst-facing UIs for agentic AI experiences
• Work mode: On-site in Arlington, Virginia (not remote/hybrid)

Description

Own the frontend experience analysts use every day by building a fast and readable React + TypeScript application. Develop conversation and streaming interfaces, workflow and knowledge-graph visualization, and a resilient frontend architecture that works the same in commercial cloud and disconnected, classified networks.

Responsibilities

• Build conversation and streaming interfaces for agent output (tool calls, citations, confidence, timeout/reconnect recovery).
• Create workflow and knowledge-graph views that keep dense analytical data legible.
• Own frontend architecture: state management, data fetching, API contract integration, and patterns that endure frequent change.
• Implement shared components and a design system to ensure consistent feature behavior.
• Deliver measured performance and accessibility, using profiling rather than assumptions.
• Write component, integration, and end-to-end tests covering the specification.
• Ensure builds work disconnected with no reliance on external CDNs, fonts, or third-party services.

Requirements

• Real depth shipping production frontend software in React and TypeScript (ability to show what you owned).
• Experience building interfaces for real-time/streaming data such as WebSockets or server-sent events.
• Deep component design, state management, and render performance with examples of profiled and fixed issues.
• Clean, well-tested code including component and end-to-end tests.
• Enough backend fluency to read and shape API contracts (Python is a plus).
• Comfortable taking a loose ask and turning it into a working interface.
• Willingness to work on site in Arlington, Virginia.

Benefits

• Health, dental, and vision insurance (99% premiums covered; 100% for dependents)
• Optional HSA plan and Health Reimbursement Account
• Life insurance ($150,000) plus AD&D
• 401(k) with 100% match on first 6% and immediate vesting
• Wellhub Gold, unlimited PTO, paid federal holidays and winter break days
• Supportive leave of absence program (military, medical events, parental leave)
• Daily in-office meals and snacks, commuter benefits, company phone plan, and a company-paid iPhone