# Frontend Engineer, Core Platform at Lumbra

- Company: Lumbra
- What the company does: The operating system for agentic AI in high-consequence environments. Backed by Costanoa Ventures.
- Company website: https://lumbra.ai
- Type: Startups
- Level: Mid level
- Location: Arlington
- Work setup: On-site
- Pay: $120K to $300K base salary per year (USD)
- Posted: 2026-11-04
- Apply by: 2026-12-19
- Apply: https://jobs.ashbyhq.com/lumbra/f773d5e5-b76a-4cad-a563-ff30e4ae464a?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/lumbra-frontend-engineer-core-platform/

## 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. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Real depth shipping production front-end software in React and TypeScript. We care about what you have owned and the depth of your experience, not a year count, engineers with 2+ years who have owned meaningful front-end systems are welcome
- Experience building interfaces for real-time or streaming data, such as WebSockets or server-sent events, including the state model behind them
- Real depth in component design, state management, and render performance, with examples of problems you profiled and fixed
- Clean, well-tested code, including component and end-to-end tests
- Enough backend fluency to read and shape API contracts, Python is a plus
- Comfort taking a loose ask and turning it into a working interface without a finished design

Tags: Software Engineer

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/lumbra-frontend-engineer-core-platform/