Jobs in the United States

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Added 2 mins ago
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Machine Learning Engineer Intern, AI & Robotics
RoboForce
Milpitas, CA
- $5,000 to $6,500 USD / month
We are seeking a Machine Learning Engineer Intern to join us in developing advanced AI capabilities for robotics. The internship starts from November 2026 for 3-6 months. As part of our…
Added 6 mins ago
Software Engineer, Agent Eval Platform
ServiceNow
Mountain View, CA
ServiceNow: it all started in sunny San Diego, California in 2004 when a visionary engineer, Fred Luddy, saw the potential to transform how we work. Fast forward to today - ServiceNow…
Added 9 mins ago
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Senior Staff Systems Security Engineer, Program Protection (TX/DC/Sea) (R6515)
Shield AI
United States
- $175,000 to $315,000 USD / year
…Hivemind autonomy software, V-BAT and X-BAT aircraft, and Aechelon simulation and synthetic reality technologies. With offices and facilities across the U.S., Europe, the Middle East, and…
Added 9 mins ago
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Senior Engineer, Production Test (R6513)
Shield AI
Seattle, WA
- $140,000 to $210,000 USD / year
…Hivemind autonomy software, V-BAT and X-BAT aircraft, and Aechelon simulation and synthetic reality technologies. With offices and facilities across the U.S., Europe, the Middle East, and…
Added 10 mins ago
Senior Planner
Bristol Alliance of Companies
Norfolk, VA
…AICUZ & RAICUZ plans include AICUZ, Noise, and Naval Aviation Simulation Model (NASMOD)…
Added 15 mins ago
Electrical Engineer 1 (Onsite)
United States
The Rockford, IL Power and Controls division is looking for an entry level Electrical Engineer 1. This role is onsite, in Rockford, IL. This role may be eligible for relocation.
Added 18 mins ago
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Software Reliability Engineer
ATOMS Careers page
Pittsburgh, PA
- $158,000 to $218,000 USD / year
Experience working with robotics, embedded systems, or software that interacts with physical hardware, including hardware-in-the-loop testing, simulation, or debugging timing-related issues.
Added 26 mins ago
Senior Performance Analysis Engineer – Ground-based Missile Defense (MDA)
Mission Driven Research
Huntsville, AL
MDR is looking for an experienced, team-oriented Senior Performance Analysis Engineer to join our Huntsville, AL team. In this role you will support the analysis and assessment of…
Added 27 mins ago
Senior Mechanical Engineer
Hewlett Packard Enterprise
Sunnyvale, CA
Reporting to the Head of Mechanical Engineering, the Senior Mechanical Engineer will be a hands-on individual contributor responsible for the mechanical design, structural analysis,…
Added 27 mins ago
Principal Mechanical Engineer
Hewlett Packard Enterprise
Sunnyvale, CA
Reporting to the Head of Mechanical Engineering, the Principal Mechanical Engineer will be a hands-on individual contributor responsible for the mechanical design, structural analysis,…
Added 27 mins ago
Space Flight Dynamics Engineer
The Aerospace Corporation
El Segundo, CA · Chantilly, VA · Colorado Springs, CO · Albuquerque, NM
…and optimization, and trans atmospheric flight modeling and simulation. We are looking for a Member of the Technical Staff/Senior Member of the Technical Staff to join the EOFDD team. The…
Added 36 mins ago
Senior Systems Engineer - MANTA SEIT (Onsite)
RTX
United States
Join our MANTA SEIT Department as a Senior Systems Engineer, where you will play a critical role in supporting the development, integration, and validation of resilient navigation systems.…
Added 38 mins ago
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Principal Energetics Process Engineer
Ohr
Lafayette, CO
- $160,000 to $220,000 USD / year
- Propellant or ordnance qualification programs, and experience with process simulation tools such as Aspen Plus, ChemCAD, or AVEVA
Added 38 mins ago
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Principal Process Engineer
Ohr
Lafayette, CO
- $160,000 to $220,000 USD / year
…process engineering that gets them built. As Principal Process Engineer you are accountable for the balances, the equipment, the drawings, and the engineering packages that EPC contractors…
Added 38 mins ago
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Sr. Staff Engineer, Supply Chain - Mechanical Commodities (R6524)
Shield AI
Seattle, WA
- $210,000 to $315,000 USD / year
…Hivemind autonomy software, V-BAT and X-BAT aircraft, and Aechelon simulation and synthetic reality technologies. With offices and facilities across the U.S., Europe, the Middle East, and…
Added 39 mins ago
Sr Systems Engineer
Rite-Hite Doors, Inc.
Dubuque Headquarters, IA · Milwaukee, WI
Perform analytical modeling using calculations or simulation tools like MATLAB or Spice.
Added 41 mins ago
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Hardware Development Engineer
Manpower Engineering
Milwaukee, WI
- $40 to $50 USD / hour
Our client, a global leader in industrial automation and control technologies, is seeking a Hardware Development Engineer to join their engineering team. As a Hardware Development Engineer,…
Added 43 mins ago
Wireless Design Verification Engineer
Apple
San Diego, CA · Sunnyvale, CA
…concept through production. As a Wireless Radio Verification Engineer, you'll ensure first-time-right silicon success through sophisticated testbenches, comprehensive scenarios, and…
Added 45 mins ago
Principal Engineer - FPGA/ASIC Design
Rolls-Royce
United States
Job Title: Principal Engineer - FPGA/ASIC Design
Added 46 mins ago
Senior CAD Designer
USA Donaldson Company Inc.
Bloomington, MN
Design Intent for complex models and assemblies including DFM, advanced sketches, tolerances, basic simulation and rendering, master models, equations, design rules, edits, and integration…
Added 49 mins ago
Senior Systems Engineer-Development
BAE Systems
Nashua, NH
…Business Area has an immediate opening for an experienced Systems Engineer specializing in support to our development efforts in our Terminal High Altitude Area Defense (THAAD) Missile…
Added 55 mins ago
Modeling and Simulation Engineer, Junior
Booz Allen Hamilton_United States
Rome, NY
Modeling and Simulation Engineer, JuniorThe Opportunity:
Added 56 mins ago
Aerospace Engineer
AMERICAN SYSTEMS
Patuxent River, MD
As an Aerospace Engineer with AMERICAN SYSTEMS you will have the opportunity to do the following:
Added 57 mins ago
Sr. Engineering and Requirements Technical Advisor
The Aerospace Corporation
Colorado Springs, CO · El Segundo, CA
…Intelligence (BMC3I) systems in support of the SYD85/S5 Chief Engineer. As a trusted technical advisor to BMC3I Program Managers, the SYD85/S5 Chief Engineer, and the SYD85 Commander you…
Added 57 mins ago
Autonomous Trajectory & Mission Planning Engineer
The Aerospace Corporation
Colorado Springs, CO · El Segundo, CA · Chantilly, VA · Albuquerque, NM
…sequential decision making, and atmospheric flight modeling and simulation. The selected candidate will provide expertise for a wide range of customer flight mechanics needs, supporting…

Horizon3

Senior Full-Stack Engineer, Autonomous Defense

Remote, United States

$195,000 to $235,000 USD / year

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Job details

Pay: $195,000 to $235,000 USD / year
Posting language: English
Posted: Nov 3, 2026

Original job description

Get to Know Us

Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZeroTM platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by IT Ops/SecOps teams, consulting pentesters, and MSSPs and MSPs.

We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools and false positives, resulting in alert fatigue, blind spots, "checkbox” security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn it alls, committed to a culture of respect, collaboration, ownership, and results.

What You'll Do

As a Senior Full-Stack Engineer on the Autonomous Defensive team, you'll build the platform that NodeZero's defensive agents run on. Our AI researchers define what these agents should reason about, you build the systems that make that work in production, across thousands of customer tenants, without breaking anything.

That means real distributed systems problems, not glue code. They execute inside customer environments under tight isolation, credential, and egress constraints. And when an agent proposes a change in production, the platform has to be able to simulate it, stage it, gate it on approval, roll it back, and prove after the fact exactly what happened and on whose authority.

It also means the interfaces that sit on top of all of that. Autonomous systems are only trusted to the extent that people can see what they did and intervene before they do it, and that burden lands on the front end. These surfaces are part of the product, not a thin layer over the API, and you'll own them end to end alongside the backend they talk to.

This is a platform role. You'll own the runtime, the tool layer, the orchestration, the connector framework, and the observability and UI that make agent behavior debuggable. We're looking for engineers with strong backend depth who are comfortable building the front end when the workflow demands it - not because it's beneath them, but because they understand the value of end-to-end delivery. You'll work closely with our AI researchers, but you are not being hired to tune prompts - you are being hired to build the substrate that makes their work shippable and safe.

Responsibilities

Build and own the agent execution runtime: durable, resumable, long-running workflows with checkpointing, idempotent steps, cancellation, and timeouts at both the step and run level.
Design and implement the tool layer that agents act through - a registry with versioning, schema validation, per-tenant enablement, and authorization enforced server-side rather than by the model.
Build the connector framework for third-party security control planes (EDR, firewall, identity, SIEM, cloud IAM).
Implement the safe-change pipeline: dry-run and simulation, blast-radius classification, approval gates for high-impact actions, staged rollout, rollback, and an immutable per-tenant audit trail.
Build the operator-facing front end in React and TypeScript, turning dense system state into interfaces a user can reason about and act on with confidence.
Build the client-side data and streaming layer that keeps those interfaces accurate against long-running, incrementally updating state, over WebSockets rather than polling.
Extend NodeZero's tenant isolation model to agents that take write actions, covering execution boundaries, egress control, quotas, and cross-tenant leakage in caches, indexes, and logs.
Develop core product features in ETL and GraphQL to support data processing and retrieval for agent context, run history, and remediation state.
Build the ETL pipelines that turn pentest and remediation outcomes into the datasets our researchers train and evaluate against.
Instrument everything. Distributed tracing across an agent run, cost and token accounting per tenant, and the tooling to answer "why did the agent do that" without guessing.
Partner with AI researchers, attack engineers, and product to take capabilities from prototype to production, and feed platform constraints back into research direction early rather than late.

Required Education / Experience

Bachelor's Degree in Computer Science, Computer Engineering or related field.
7+ yrs professional software engineering experience using modern object-oriented or functional languages (Python, Go, Scala, C++, TypeScript, etc).
Proven experience delivering backend APIs, especially GraphQL, and consuming them from a modern web stack.
Production experience with React, TypeScript, and modern CSS layout, with the judgment to build a usable interface for a complex workflow without a designer holding your hand.
Experience building applications on cloud computing platforms such as AWS, Azure, GCP, using container technologies such as Docker and Kubernetes.
Expert proficiency in SQL.
Demonstrated experience designing and operating distributed systems in production: asynchronous workflows, queues, retries, idempotency, and partial failure.
A track record of shipping and operating production services, including on-call ownership.

What Sets You Apart

Experience building agentic or LLM-backed systems in production
Experience with a durable execution (such as Temporal) or workflow engine or having built equivalent checkpointing yourself.
Experience building multi-tenant platforms with hard isolation requirements, workload identity, and short-lived credential brokering.
Experience integrating a long tail of third-party APIs behind a normalized abstraction.
Familiarity with security control planes and their APIs - EDR (CrowdStrike, SentinelOne, Microsoft Defender), firewalls, SIEM, cloud IAM.
Experience with database architectures including relational (PostgreSQL) and graph (Neo4j), and experience building GraphQL backends.
Experience with client-side data and streaming patterns - React Query or Apollo, GraphQL subscriptions, WebSockets - against long-running, incrementally updating state.
Experience building operator-facing or admin interfaces where density, auditability, and getting the destructive action right matter more than visual polish.
Experience with observability tooling (Datadog, Prometheus, Grafana) and distributed tracing.
Awareness of prompt injection and untrusted-input handling in systems where an agent consumes data from the environment it operates in.

Travel Required

We are a fully remote company, and this job may require up to 5% of travel to be successful.

Compensation and Values

At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations.

In accordance with various State’s transparency regulations, we provide the following salary range information for this position:

Base salary range: $195,000- $235,000 annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.
Additional compensation: All full-time roles are eligible for an equity package in the form of stock options.

Perks of Horizon3

Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.
Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.
Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.
Hybrid & Remote Work: We embrace a mix of remote and hybrid work models depending on role and location, including our Chicago office, where some roles require regular in-office presence.
Competitive Compensation: We offer competitive salary, equity and benefits. Our benefits include health, vision & dental insurance for you and your family, a flexible vacation policy, and generous parental leave.

You Belong Here

Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, hair length or any other legally protected status by law.

Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve. We believe that diverse perspectives drive innovation and strengthen our ability to create cutting-edge cybersecurity solutions. At Horizon3, every team member is valued and supported in an environment that encourages personal and professional growth.

We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Come be a part of Horizon3, where your unique contributions are recognized, and your potential is limitless.

Other Duties

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.

Application Note

In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.

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More about this job

Skills

Cybersecurity
Direct inward dialing
Workflow
Identity and access management
React
TypeScript
Data engineering
GraphQL
Process data
Research
Computer science
Computer engineering
Python
Go
Scala
C++
CSS
Cloud computing
AWS
Microsoft Azure
Google Cloud
Docker
Kubernetes
SQL
PostgreSQL
Neo4j
Datadog
Prometheus
Grafana

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