Jobs in the United States

25+ jobs

Save this search

Added just now
Manufacturing Electrical Engineer
SEDAA
Plano, TX
The Manufacturing Electrical Engineer II will support manufacturing operations through the development, maintenance, troubleshooting, and continuous improvement of electrical test systems,…
Added 1 min ago
Software Engineer II - Marketplace Efficiency (Bidding)
Indeed
Burlington, VT
As a Software Engineer II at Indeed, you will design and build software that powers shared platforms, services, and products used across the company. You'll work on systems that operate at…
Added 1 min ago
Power Engineer II
HPE
Sunnyvale, CA
HPE has an immediate need at its Sunnyvale, CA location for a Power Engineer. This position reports to the Manager of Power Systems Development, a subgroup of HPE’s Engineering Services…
Added 8 mins ago
MP
Electrical Engineer II
MESA POWER SOLUTIONS LLC
Evansville, WY
- $96,000 to $106,000 USD / year
Mesa Power Solutions is a fast-growing U.S. manufacturer delivering reliable, responsible power systems to industrial markets nationwide. We engineer and build advanced, sound-attenuated,…
Added 9 mins ago
Software Development Engineer II, Selling Partner Trust & Compliance
Amazon.com Services LLC
Seattle, WA
…buying on Amazon easier and safer in your first few weeks? As a Software Development Engineer on the Selling Partner Services team you will be actively working on systems and features that…
Added 11 mins ago
Systems Engineer II
RTX
United States
…environments? Raytheon is seeking a talented and motivated Systems Engineer II to join our team within the Systems Engineering and Test Capabilities (SETC) Discipline, supporting the LTAMDS…
Added 11 mins ago
Scrum Master –Software Engineer II
RTX
United States
Are you interested in joining a dynamic, growing professional organization? The Missile Defense Sensors (MDS) software department within Raytheon is looking for a Software Scrum Master (SM)…
Added 11 mins ago
Software Engineer II - AVI MIL FMS (Onsite)
RTX
United States
Collins Aerospace is currently seeking qualified candidates for Software Engineer II roles in our Military Avionics Flight Management department located in Cedar Rapids, Iowa. Teams are…
Added 14 mins ago
Software Engineer II - DevOps / Infrastructure (Onsite)
RTX
United States
Experience with common software development and management tools such as GitLab, Jira, Confluence, Coverity, Nexus, Artifactory, and Splunk.
Added 14 mins ago
Software Engineer II - Test Solutions Center
RTX
United States
The Software Engineer II - Test Solutions Center position is focused on the design, development, integration, and maintenance of software as a part of on-site factory support of systems to…
Added 16 mins ago
Cloud Infrastructure & Core Services DevOps Engineer
Booz Allen Hamilton_United States
North Charleston, SC · Washington, DC
Everyone is trying to “harness the cloud,” but not everyone knows how. As a DevOps engineer, you’re eager to build, manage, and secure a container platform that meets your client’s needs…
Added 16 mins ago
Cross Domain Network Engineer, Lead
Booz Allen Hamilton_United States
Washington, DC · McLean, VA · Reston, VA
…needs? Crafting the right network with the right equipment and software requires a combination of technical skill and careful planning. That’s why we need you, a network engineer who knows…
Added 17 mins ago
CS
Cloud Engineer II (Full Time) - United States
Cisco Systems, Inc.
Milpitas, CA
- Full-time
…Business Group, directly enabling Cisco’s strategic pivot to a software-first, recurring revenue model that secures the world’s most vital networks. You will join a high-performing,…
Added 17 mins ago
Software Engineer II - AI Platforms
US: Mastercard International Incor
Atlanta, GA
…Product Managers, and platform teams. This role is ideal for a software engineer with a strong foundation in backend or distributed systems who wants to apply those skills to scalable,…
Added 17 mins ago
Software Engineer II - AI Platforms
US: Mastercard International Incor
Atlanta, GA
…Product Managers, and platform teams. This role is ideal for a software engineer with a strong foundation in backend or distributed systems who wants to apply those skills to scalable,…
Added 17 mins ago
Software Engineer II
US: Mastercard Technologies, LLC
O'Fallon, MO
We are currently hiring a Software Engineer II, and the successful candidate will contribute to the design, development, testing, deployment, and support of enterprise applications while…
Added 21 mins ago
Full Stack Software Engineer II (Angular, Java)
Global Payment Holding Company
CINCINNATI, OH · ATLANTA, GA · DENVER, CO
Make your mark at one of the biggest names in payments. We’re looking for a Full Software Engineer II (Angular, Java) to join our ever-evolving software engineering team and help shape the…
Added 27 mins ago
Sr. RF/Microwave Engineer, Satellites (Starlink)
SpaceX
Redmond, WA
…allow users to connect within minutes of unboxing, and the software that brings it all together. We’ve only begun to scratch the surface of Starlink’s potential global impact and are…
Added 27 mins ago
Sr. Full Stack Engineer, Launch Software
SpaceX
Hawthorne, CA
The application software team is the central nervous system of SpaceX – we create mission critical applications that are used throughout SpaceX to accelerate launch vehicle production and…
Added 27 mins ago
Power Electronics Engineer - High Voltage (Starlink)
SpaceX
Redmond, WA
…allow users to connect within minutes of unboxing, and the software that brings it all together. We’ve only begun to scratch the surface of Starlink’s potential global impact and are…
Added 28 mins ago
Tool Integration Electrical Engineer I/II
TTI Consumer Power Tools, Inc.
Anderson, SC
The Tool Integration Electrical Engineer I/II will drive the embedded systems design and implementation for battery-powered outdoor equipment, with a focus on power electronics, motor…
Added 41 mins ago
JH
Senior Linux Systems Engineer
Johns Hopkins Applied Physics Laboratory
Laurel, MD
- $100,000 USD / year
At APL, our engineers don’t just keep systems running - we architect the resilient digital backbone powering high-performance computing (HPC) clusters, advanced research environments, and…
Added 41 mins ago
BB
Specialist II-IC Quality Assurance
BMO Bank N.A.
Tempe, AZ
- $129,290.1 USD / year
Requirements: Bachelor's degree in Computer Science, Computer Engineering, Information Systems or related field (willing to accept foreign education equivalent) plus four (4) years of…
Added 41 mins ago
BB
Specialist II-IC Quality Assurance
BMO Bank N.A.
Tempe, AZ
- $129,290.1 USD / year
Requirements: Bachelor's degree in Computer Science, Computer Engineering, Information Systems or related field (willing to accept foreign education equivalent) plus four (4) years of…
Added 41 mins ago
BB
Specialist II-IC Development
BMO Bank N.A.
Tempe, AZ
- $150,000 USD / year
BMO Bank N.A. seeks a Specialist II-IC Development to drive the overall software development lifecycle including working across functional teams to transform requirements into features.…

Lumbra

Frontend Engineer, Core Platform

Arlington, VA, United States

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

Apply About employer

Applications open in a new tab.

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.

Apply About employer

Report this job