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Added 3 mins ago
Front End Web Applications Developer (Mid-Level) (5664)
SMX
Charleston, WV
SMX is currently looking for a highly motivated Software Engineer - Front End Web Applications to contribute to the design, build, support, and implementation of the Budget and Spend (BAS)…
Added 3 mins ago
Front End Web Applications Developer (Junior) (5660)
SMX
Charleston, WV
SMX is currently looking for a highly motivated Software Engineer - Front End Web Application s to contribute to the design, build, support, and implementation of the Budget and Spend (BAS)…
Added 12 mins ago
LillyDirect Pharmacy Data Engineer
Lilly
Indianapolis, IN
As a Data Engineer for Master Data, you will be responsible for designing, developing, and maintaining the data solutions that ensure the availability, quality, and integrity of data for…
Added 14 mins ago
J
Sr. Systems Engineer – AI Gateway Platform
Jobgether
Remote, United States
- $125,000 to $180,000 USD / year
We are seeking an experienced Systems Engineer to own, scale, and secure an enterprise AI Gateway platform that enables reliable connectivity between AI workloads and critical business…
Added 28 mins ago
Staff Machine Learning Engineer - Edge AI
Samsara
Remote, United States
The Samsara AI team builds end-to-end AI solutions for our customers as well as core ML infrastructure for Samsara. As a Staff Machine Learning Engineer, you will be working with…
Added 29 mins ago
Autonomous Systems Project Engineer- Launched Effects
Integration Innovation, Inc. (i3)
Huntsville, AL
i3 is searching for an Autonomous Systems Project Engineer to serves as the technical innovator and engineering lead driving the development, integration, and flight-testing of…
Added 29 mins ago
Autonomous Systems Project Engineer
PPT Solutions, Inc.
Huntsville, AL
PPT Solutions is looking for an Autonomous Systems Project Engineer in the Launched Effects platforms!
Added 41 mins ago
Ford Racing Product Development Engineer
Ford Motor Company
Allen Park, MI
…are looking for a talented and highly motivated Body Exterior Engineer to join our Body Exterior Engineering…
Added 42 mins ago
Software Engineer Lead
Michigan State University Federal Credit Union
East Lansing, MI
Description The Software Engineering Lead is responsible for the design, development, implementation, and lifecycle ownership of MSUFCU's portfolio of software solutions. This can include…
Added 42 mins ago
Blue Cruise Core Integration Engineer
Ford Motor Company
Dearborn, MI
We bring engineering ideas to life. In Product Development, we make driving more exciting, enjoyable and sustainable. Ford’s Advanced Driver Assistance Systems (ADAS) team designs and…
Added 47 mins ago
J
Senior Software Back End Engineer
Jobgether
Remote, United States
- $122,275 to $165,431 USD / year
We are seeking an experienced Senior Software Back End Engineer to design, develop, and enhance reliable, scalable software solutions in a cloud-based environment. In this role, you will…
Added 1 hour ago
Engineering Manager - Property Management
TheGuarantors
New York, NY
The Engineering Manager, Property Management will lead the team that owns the core platform capabilities powering property management workflows across TheGuarantors including core property…
Added 1 hour ago
Senior Staff Software Engineer, Android & IoT
Jobgether
Remote, United States
This is a senior technical leadership opportunity for an experienced software engineer to shape the architecture and evolution of products that support large-scale connected device…
Added 2 hours ago
Senior Open Source Developer - TypeScript/Node/Angular/React/.NET
Kelly Services
Boston, MA
…development and community-driven innovation. You will help design and deliver new features, APIs, and modern platform capabilities while working closely with product, engineering, and open…
Added 2 hours ago
Lead Open Source Developer - TypeScript/Node/Angular/React/.NET
Kelly Services
Boston, MA
We are seeking a Lead Open Source Software Engineer to provide technical leadership across a growing suite of open source products and platforms. This role combines hands-on software…
Added 2 hours ago
Senior AI/ML Engineer - LLM & Agent Stack (Customer Facing)
TrueFoundry
NY · San Mateo, CA
You’ll design and own core components that enable enterprise customers to run production agentic AI safely and efficiently on TrueFoundry. This includes building robust orchestration for…
Added 3 hours ago
Production Team Lead
Illinois Tool Works Inc.
United States
Loma Systems® is a premier manufacturer of inspection equipment used to identify contaminants and product defects in the food and pharmaceutical industries. Established in the UK in the…
Added 4 hours ago
TT
Product Engineer
True Talent Solutions Partners
Palo Alto, CA
- $185,000 to $205,000 USD / year
- Design and run A/B tests, interpret results with analytics tools or SQL, and turn findings into product improvements.
Added 4 hours ago
M
Senior Hardware Engineer
Microsoft
WA · CA · OR · Redmond, WA · Mountain View, CA · Hillsboro, OR · Redmond · Mountain View · Hillsboro
- $119,800 to $261,000 USD / year
The SPPO (SCHIE Product and Procurement Optimization) team is seeking a Senior Hardware Engineer, Technical Program Manager to drive complex hardware initiatives. This role requires a…
Added 4 hours ago
Test Manager - Output/CCM/Document Management Systems
Jobgether
Remote, United States
The position may potentially be combined with a 50% Test Engineer assignment.
Added 4 hours ago
Senior Product Manager, Product Systems
Agoda
Chicago, IL
As Senior Product Manager, Product Systems, your product is how our product organization works. You'll design and build the systems, data and AI workflows behind our core loops: from idea…
Added 4 hours ago
Thin Film Engineer
Keysight Technologies, Inc.
Santa Rosa, CA
Keysight is at the forefront of technology innovation, delivering breakthroughs and trusted insights in electronic design, simulation, prototyping, test, manufacturing, and optimization.…
Added 4 hours ago
Technical Service Engineer I
Daifuku America Corporation
Reynoldsburg, OH
Added 4 hours ago
Engineer - Pump experienced (Aerospace)
PARKER HANNIFIN CORPORATION
Elyria, OH
…parts, processes, or systems to develop new and/or improve core products. Develops and recommends solutions to well-defined engineering requirements, or for components or segments of a…
Added 4 hours ago
Engineer: Motor Control - experienced (Aerospace)
PARKER HANNIFIN CORPORATION
Elyria, OH
…parts, processes, or systems to develop new and/or improve core products. Develops and recommends solutions to well-defined engineering requirements, or for components or segments of a…

Lumbra

Frontend Engineer, Core Platform

Arlington, VA, United States

$120,000 to $300,000 USD / year

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Job details

Pay: $120,000 to $300,000 USD / year
Posting language: English
Posted: Nov 4, 2026

Original job description

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 TypeScript, from conversation interfaces to workflow and graph views.
~20% quality and performance. Testing, render performance, accessibility, and the shared components the rest of the team builds on.
~10% users and product. Working with Forward Deployed Engineers and analysts to turn feedback from the field into interface changes.

What You'll Own

Conversation and streaming interfaces for agent output, including tool calls, citations, confidence, and long-running work that has to recover cleanly from timeouts and reconnects.
Workflow and knowledge-graph visualization that keeps dense analytical data legible.
Front-end architecture: state management, data fetching, API contracts with the backend, and patterns that survive constant change.
Shared components and the design system in code, so new features look and behave consistently.
Performance and accessibility, measured rather than assumed. You profile before guessing and treat slowness as a defect.
Front-end testing: component, integration, and end-to-end tests that cover the spec rather than the implementation.
Builds that work disconnected, with no reliance on external CDNs, fonts, or services, so the same app runs inside air-gapped deployments.

You'll Work Alongside

CIA officers, MIT engineers, Special Operations combat veterans, and applied AI engineers from frontier labs including Anthropic and Google. You will make decisions that immediately affect national security. You will own part of a company early and when it matters.

What This Role Is Not

A pixel-pushing role. You shape the experience, not just implement mockups.
A role where performance is someone else's problem.
A backend role. You'll read and shape API contracts, but your depth is the front end.

Required Qualifications

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.
A humble, hands-on approach.
Willingness to work on site in Arlington, Virginia.

Preferred Qualifications

Experience building LLM or agent interfaces, including streaming output, tool-call visualization, and citation surfacing.
Experience with data visualization or graph exploration libraries.
Experience building or maintaining a design system.
Experience with accessibility (WCAG) in complex applications.
Experience building analytical, intelligence, financial, or developer-facing tools.
Experience shipping front ends into restricted or offline environments.
An active U.S. security clearance, or eligibility to obtain one.

Compensation

The base salary range for this role is $120,000 to $300,000, spanning our Engineer II and Senior Engineer levels. Where an offer lands depends on scope, autonomy, and technical capability, which we assess through the interview process rather than by years or title. Our ranges are a real guide, and we are flexible for the right person: if your experience clearly exceeds this role's scope, we will consider you at a higher level, with that level's range. Base salary is one part of total compensation, alongside equity and the benefits below.

What We Offer

Health, dental, and vision insurance. 99% of your premiums covered, and 100% of your dependents' premiums.
Optional HSA plan. Lower premium, HSA eligible, fully portable, self-directed or managed.
Health Reimbursement Account for qualified healthcare expenses.
Life insurance of $150,000 plus AD&D, 100% company paid.
401(k) with a 100% match on the first 6%, immediately vested. No cliff, no waiting period. Yours from day one.
Wellhub Gold. Everything from Gold's Gym to Lifetime, fully covered, plus [solidcore], F45, and hundreds of other studios.
Unlimited PTO. Real time off, not accrual-based. Take what you need, no counting required.
Every federal holiday, plus additional paid days off over the winter break.
Supportive leave of absence program, including time off for military service, medical events, and parental leave.
Breakfast, lunch, and endless snacks every day you are in the office.
Pre-tax commuter benefits.
Company phone plan. A new iPhone, fully company paid.

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