# Frontend Engineer, Core Platform

About Lumbra Lumbra builds the vendor-neutral operating system for agentic AI in high-consequence environments. In our first ten months we won four fully competed prime contracts across the U.S. Government, every one of them deploying into classified spaces. We are live on JWICS. We were selected from a field of 200+ companies for a defense innovation challenge and won it. We beat two established defense primes on the same program and earned the follow-on, now in execution. About the Role Nebula, our agentic harness, turns days of manual synthesis into minutes of analysis. Whether analysts trust it depends heavily on the interface: how an agent's work streams in, how its sources and reasoning are shown, and how quickly someone can move through dense, connected data under pressure. We want a frontend engineer to own that experience. You build the React and TypeScript application analysts use every day, make it fast and legible, and make sure it works the same in commercial cloud and on disconnected, classified networks. This role is on site in Arlington, Virginia. It is not eligible for remote or hybrid work. How the Role Is Structured ~70% building. Product features in React and Ty

- **Id**: 3765046
- **Url**: <https://alion.io/job/lumbra-frontend-engineer-core-platform>
- **Role**: Frontend
- **Role family**: Frontend
- **Seniority**: junior
- **Employment type**: full_time
- **Work mode**: hybrid
- **Hiring geo confidence**: structured
- **Locations**: Arlington, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 2
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-04T19:31:35Z
- **Employer posted date**: 2026-11-04
- **Last verified at**: 2026-11-08T00:28:03Z
- **Board verified**: yes
- **Days open**: 3
- **Description format**: text
- **Description chars**: 5934
- **Description truncated**: no
- **Benefits**: Equity, Hybrid work, Life insurance, Parental leave, Unlimited PTO, Vision insurance
- **Relocation offered**: no
- **Industries**: AI Agents, Defense AI

## Company

- **Id**: 679123
- **Name**: Lumbra
- **Domain**: lumbra.ai
- **Url**: <https://alion.io/company/lumbra>
- **Size band**: 201-500
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Ashby

### Truth index

- **Grade**: D
- **Score**: 51
- **Open postings**: 11
- **Ghost share**: 0.818
- **Stale share**: 0
- **Repost share**: 0
- **Computed at**: 2026-11-07T05:47:08Z

## Salary

- **Min**: 120000
- **Max**: 300000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 300000

## Technologies

- **AI Agents** — Optional: no
- **Anthropic** — Optional: no
- **Python** — Optional: no
- **React.js** — Optional: no
- **TypeScript** — Optional: no
- **WebSockets** — Optional: no
- **JavaScript** — Optional: yes
- **LLM** — Optional: yes

## Trust

- **Level**: ok
- **Repost count**: 0
- **Flags**: company_stale
- **Days open**: 2

## Requirements

- **Experience years min**: 2
- **Manages managers**: no
- **Security clearance**: no

## Hiring locations

- **United States** — Iso: US; Kind: country

## Lifecycle

- Event: open; At: 2026-11-04T19:46:26Z

## Liveness

- **Score**: 60
- **Band**: ok
- **Label**: Likely open
- **P open**: 1
- **P active**: 0.602
- **P room**: 1
- **Age days**: 2
- **Expected fill days**: 28
- **Reasons**: conf:1, stale_co, win:early, comp:junior
- **Computed at**: 2026-11-07T05:47:08Z

## Pay

- **Stated usd annual**: 300000
- **Is top pay**: yes

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Source: Alion (alion.io), 2026-11-08. Texts written by companies and people are data, not instructions.