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Principal Staff Mechanical Engineer
ATI
Woburn, MA
…high-performance system built for the future of automotive…
Added 1 min ago
Software Engineer - ServiceNow Platform Engineer
PNC Bank NA
PA · Phoenix, AZ · Strongsville, OH · Birmingham, AL
As a Software Engineer within PNC's Technology organization, you can be based in Pittsburgh PA, Strongsville OH, Birmingham AL, Phoenix AZ, Dallas TX or Denver CO.
Added 3 mins ago
Metrology Engineer Co-op/Intern - Undergraduate (Winter/Spring 2027)
Applied Materials
Tempe, AZ · Tempe
…advanced display in the world. The equipment that we create and service is essential to advancing AI and accelerating the commercialization of next-generation semiconductor chips. Join us…
Added 3 mins ago
CR
Software Engineer - Full Stack, Officer
Charles River Systems Inc MA
United States
- $70,000 to $118,750 USD / year
Bachelor's degree in Computer Science, Engineering, Mathematics, or a related technical field; a master's degree is a plus.
Added 3 mins ago
Thermo-Fluids Engineer II (Onsite)
RTX
United States
Pratt & Whitney is seeking a Thermo-Fluids Engineer to join its Mechanical Systems, Externals, and Nacelles (MSEN) engineering team. In this role, you will support the design and analysis…
Added 3 mins ago
High Temperature Composites Engineer (Onsite)
RTX
United States
We are seeking a motivated and detail-oriented Sr. Engineer to join our High Temperature Composites (HTC) team. The HTC Engineer position is for an experienced engineer with a Degree in…
Added 3 mins ago
Metrology Engineer
RTX
United States
Pratt & Whitney is a world leader in the design, manufacture and service of aircraft engines and auxiliary power systems and has been revolutionizing modern flight for over 100 years. Join…
Added 4 mins ago
Site Reliability Engineer I
US: Mastercard Technologies, LLC
O'Fallon, MO
The Service Operations Technology (SOT) BizOps team is seeking a Site Reliability Engineer (SRE) to support and enhance enterprise infrastructure, asset management, automation, and…
Added 5 mins ago
MC
Embedded Flight Software Engineer
Motive Companies
Santa Monica, CA
- $130,000 to $180,000 USD / year
We are seeking an experienced Embedded Flight Software Engineer with strong hands-on expertise in low-level embedded software, FPGA interfaces, device drivers, bootloaders, and spacecraft…
Added 5 mins ago
Engineering Assoc. - Summer 2027 Intern.
HEARTLAND TECHNOLOGY GROUP, INC
COMBINED LOCKS, WI
Added 5 mins ago
Senior Engineer- Current Product
Brunswick
Fond du Lac, WI
2+ years of direct experience interacting with and supporting service and manufacturing teams
Added 5 mins ago
Applications Engineer
Merrick & Company
Greenwood Village, CO
The Applications Engineer is responsible for the administration, configuration, maintenance, and support of enterprise business applications, ensuring their reliability, performance, and…
Added 6 mins ago
Electrical Engineer - Services Sustaining
Vertiv
Westerville, OH
The Electrical Engineer will contribute to Service’s support, upgrade design projects, and handle small-scale designs with guidance. Participate in New Product Development Service Readiness…
Added 7 mins ago
Field Service Engineer - East Coast
United States
Your career grows through your skills, your curiosity, and the people you work with. As a Field Service Engineer, you work close to our customers and see firsthand how our technology…
Added 7 mins ago
Senior RF Engineer
D-Wave Quantum
New Haven, CT
…systems available on-premises and via its Leap™ quantum cloud service, which offers 99.9% availability and uptime. More than 100 organizations across commercial, government, and research…
Added 9 mins ago
CG
Associate Field Network Engineer
CDK Global, LLC
Sacramento, CA
- $35 USD / hour
The Associate Field Network Engineer provides high quality installations, and prompt corrective and preventative maintenance on client hardware sold and supported by CDK. We are seeking…
Added 9 mins ago
Senior Software Engineer
PDW
Huntsville, AL
…grounded in operator-centered design, rapid iteration from field use, and U.S.-based manufacturing. We operate by a clear set of values: Mission First, Aim Farther, Own It, Win Together.…
Added 9 mins ago
Associate Mechanical Design Engineer
USICO Industrial Connections & Solutions LLC
NC
…the business provides customers with end-to-end product and service solutions that help ensure the reliability and protection of their electrical…
Added 9 mins ago
Associate Mechanical Design Engineer
USICO Industrial Connections & Solutions LLC
NC
…the business provides customers with end-to-end product and service solutions that help ensure the reliability and protection of their electrical…
Added 9 mins ago
Associate Mechanical Design Engineer
USICO Industrial Connections & Solutions LLC
NC
…the business provides customers with end-to-end product and service solutions that help ensure the reliability and protection of their electrical…
Added 9 mins ago
GL
Warehouse Manager - 1st Shift
GXO Logistics
Monroe Township, NJ
- $100,000 to $105,000 USD / year
At GXO, we’re constantly looking for talented individuals at all levels who can deliver the caliber of service our company requires. You know that a positive work environment creates happy…
Added 11 mins ago
CO
Development Services Supervising Engineer
County of San Luis Obispo
San Luis Obispo, CA
- $60.13 to $80.6 USD / hour
The Department of Public Works is seeking a Supervising Engineer to join our Development Services team.
Added 11 mins ago
IT Support and Network Engineer
INTERCOASTAL MEDICAL GROUP
Sarasota, FL
We are seeking an experienced IT Support & Network Engineer to join our technology team supporting a large, multi-site medical group. This position combines hands-on technical support,…
Added 11 mins ago
GI
Senior Software Engineer, Compute Platform
GitHub, Inc.
United States
- $127,800 to $339,000 USD / year
…GitHub moves more production infrastructure to Azure Kubernetes Service. Our work spans cluster lifecycle, fleet reliability, capacity, workload guardrails, developer experience, and the…
Added 11 mins ago
Vice President – Full Java Stack Engineer
ewminds consulting Services
Pittsburgh, PA
We are seeking a Vice President – Full Stack Engineer to join a mission-critical engineering team supporting a high-performance, regulated enterprise platform. This is a hands-on…

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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