Jobs in the United States

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Added 5 mins ago
IG
Cyber ISSE - Secret
Insight Global
Lincoln, MA
- $60 to $70 USD / hour
A federal client is seeking a Cyber Security Engineer support all aspects of acquisition, system engineering reviews, and milestone entrance/exit criteria in Lexington, MA. Responsibilities…
Added 5 mins ago
Manufacturing Engineer III
General Atomics
Acton, MA
…expanding portfolio of specialized products and integrated system solutions support critical fleet, space systems and satellites, missile defense, power and energy, and process and…
Added 5 mins ago
Electrical Engineer, RDPI
Amazon
Westboro, MA
As an Electrical Engineer on our team, you will design industrial control panels, select and integrate sensors and components, and develop electrical systems for packaging and sortation…
Added 5 mins ago
Senior Technical Engineering Leader - Guidewire PolicyCenter & Policy Lifecycle
MAPFRE Insurance
Webster, MA
…This role will be instrumental in driving the architecture, design, development, and modernization of critical policy administration capabilities that support product configuration,…
Added 5 mins ago
Product Definition Engineer - Designer
GE Aerospace
Lynn, MA
The PDE Designer supports the engineering function to perform the design, test, or integration required to define and support assigned components, assemblies or systems that meet business…
Added 5 mins ago
Staff Quality Systems Engineer
J&J Family of Companies
Danvers, MA
We are searching for the best talent for a Staff Quality Systems Engineer to lead and optimize CAPA and Nonconformance (NC) processes within a regulated medical device environment. This…
Added 5 mins ago
QA Engineer- INDIA
Insight Global
Westborough, MA
We are looking for a strong QA Engineer to join our team! This role is responsible for supporting the Test Engineering team in the planning, development, and maintenance of a comprehensive…
Added 5 mins ago
SDE II, Perception and SLAM, Autonomous Mobility
Amazon
North Reading, MA
…robot. We are looking for an enthusiastic Software Development Engineer to join our perception, localization, and machine learning team. You will be part of an exceptional group of…
Added 5 mins ago
Quality Assurance Engineer
Zoll Medical Corporation
Chelmsford, MA
The Product Quality Assurance Engineer supports product quality throughout the product lifecycle, with a focus on complaint investigations, risk management support, and product quality…
Added 5 mins ago
Senior Frontend Engineer - Hashicorp Vault
IBM
LOWELL, MA
Lead and execute large-scale frontend projects, including OpenAPI-driven dynamic form generation, design system migrations, and modular architecture patterns
Added 5 mins ago
Staff Engineer - Software Engineering
Capital One
Cambridge, MA
As a Staff Engineer at Capital One, you will be a part of a community of technical experts working to define the future of banking in the cloud.
Added 5 mins ago
Senior Quality Engineer
Medtronic
Boxborough, MA · Boston, MA
Working knowledge of EN ISO 13485, particularly Design and Development requirements (Clause 7.3), and experience supporting compliant implementation within a regulated quality system.
Added 5 mins ago
AT
Network Infrastructure Engineer II
Akamai Technologies, Inc.
Boston, MA
- $83,200 to $149,800 USD / year
As a Network Infrastructure Engineer II, you will oversee operations in our global data centers. You will monitor and maintain our data centers, networks, and servers worldwide. You will…
Added 5 mins ago
Senior Ellucian Technical and Integrations Engineer
State of Massachusetts
Boston, MA
Added 5 mins ago
Senior Network Engineer
Cognizant
Boston, MA
Cognizant is seeking a Senior Network Engineer to design, implement, secure, operate, and optimize enterprise datacenter, campus, branch, wireless, and hybrid-cloud networks. This role…
Added 6 mins ago
Software Engineer II
Amentum
Boston, MA
The Software Engineer II will perform full stack development with C# program, ReactJS, MVC, Linq, and rest API development in NET Core platform. This position is US remote teleworking…
Added 6 mins ago
AI Automation Architect - Manufacturing and MES processes- Remote
Cognizant
Boston, MA
We are seeking an AI Automation SME to lead the design and delivery of AI-enabled automation solutions for manufacturing and MES processes. The role will translate business requirements…
Added 6 mins ago
Mainframe Technical Engineer
Highmark Health
Boston, MA
This job is an integral member of one of our teams responsible for supporting the design, development, and maintenance of our Mainframe technical solutions, ensuring their efficient and…
Added 6 mins ago
Software Engineer
Teradata
Boston, MA
This position is for a Software Engineer in the POD Services team within the TD Factory team. The position involves development, integration, functional and performance testing, and fault…
Added 6 mins ago
Power System Controls Engineer – Data Centers
Jacobs
Boston, MA
Jacobs’ Energy & Power business is seeking a Power System Controls Engineer to support conceptual planning, design, modeling, integration, and validation of Data Center controls ecosystem…
Added 6 mins ago
EG
Quality Assurance Engineer - PHP
Eliassen Group
Boston, MA
- $40 to $50 USD / hour
Our client seeks a results-driven Senior Quality Assurance Engineer to support Policyholder Portal applications. The role requires manual, automation, mobile, API, and database testing…
Added 7 mins ago
AI Solutions Engineer
ISACA
Remote, United States
The AI Solutions Engineer is responsible for the development, integration, implementation, and maintenance of large language model (LLM) applications used to support internal business…
Added 26 mins ago
Process Controls Engineer
Love's Travel Stops & Country Stores
Hastings, NE
Welcome to Heartwell! We are looking for a Process Controls Engineer to design,maintain, troubleshoot, and optimize process controls and automate systems to ensure safe, reliable, and…
Added 26 mins ago
Staff Software Engineer, Cloud ML Compute Services
Google
Kirkland, WA
…including information retrieval, distributed computing, large-scale system design, networking and data storage, security, artificial intelligence, natural language processing, UI design and…
Added 27 mins ago
Machine Perception (MP) Engineer – Level 6
Northrop Grumman
Gilbert, AZ
…spirit to our collaborative teams. As a Machine Perception (MP) Engineer – Level 6 located in Dulles, VA, or Gilbert, AZ , you’ll be a linchpin in missions of paramount importance, defining…

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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