Jobs in the United States

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Added 2 hours ago
CO
Security Officer 1 - Torrance State Hospital
Commonwealth of Pennsylvania
Torrance, PA
- $39,287 to $57,772 USD / year
Visitor Processing: Check identification, assist visitors, and provide non-confidential information at the desk
Added 2 hours ago
O
Civil Engineer II - City
OKC
Oklahoma City, OK
- $39.52 to $60.39 USD / hour
…plans in actual construction. The work involves administrative processing of detailed information, including contracts, and entails appraising property values and determining specific…
Added 2 hours ago
Warehouse 640 operator
Glanbia
St Johns, MI
Proficient personal computer skills including electronic mail, record keeping, routine database activity, word processing, spreadsheet, graphics, etc.
Added 2 hours ago
Civil Engineer I- Regional Systems
Oakland County
Waterford, MI
Possess a valid United States motor vehicle operator’s or chauffeur’s license. Out of Country driver’s license holders will be required to obtain the appropriate valid State of Michigan…
Added 2 hours ago
CO
Administrative Coordinator
City of Grandview Heights
Grandview Heights, OH
- $24.04 to $40.87 USD / hour
Proficiency with office software, including word processing, spreadsheets, and any software specific to the department's duties
Added 3 hours ago
Facility Manager/Planner
CGI Technologies and Solutions, Inc.
Tucson, AZ
…highly sensitive and confidential information. Experience with processing is preferred. Due to the nature of the government contract requirements and/or clearance requirements, U.S.…
Added 3 hours ago
ACR Helper
Mueller Copper Tube Company, LLC.
Fulton, MS
The operator is responsible for using an overhead crane to load bundles of tubes into the hopper for the machine, monitor the processing of the copper tubes, placing the plastic plugs in a…
Added 3 hours ago
VI
Space Mission Operator Intern, Part-Time (Fall 2026/Spring 2027) & Full-Time (Summer 2027)
Viasat, Inc.
North Logan, UT
- $20.91 to $56.97 USD / hour
- Full-time
- Part-time
Participate in hardware/software-in-the-loop (HIL/SIL) testing of the mission planning system to validate operational commands and telemetry processing.
Added 3 hours ago
OC
Post Harvest Associate
our company
Athol, MA
- From $17.5 USD / hour
…drying, curing, storage, and preparation of flower for final processing. This position is responsible for handling harvested cannabis with care and precision to maintain product quality,…
Added 4 hours ago
Tennis Shop Supervisor
ClubCorp
Northridge, CA
…and more than 17,000 employees. We are the largest owner and operator of private clubs nationwide, with 130+ country clubs, city clubs, and athletic clubs. Our Clubs offer first-class…
Added 4 hours ago
Human Resources Receptionist (Alaska Railroad)
State of Alaska
Anchorage, AK
Responsible for employee out-processing tracking for HR and Payroll purposes. Assists supervisors and employees with the process. Meets with employees on last day to complete clearance…
Added 4 hours ago
Operator - Columbus, NE
ADM
Columbus, NE
…nutrition and the world’s premier agricultural origination and processing company. Our breadth, depth, insights, facilities and logistical expertise give us unparalleled capabilities to…
Added 4 hours ago
Service Center Supervisor
Enviri Corporation
Providence, RI
…consecutive years, and the country’s largest private water operator and technology provider as well as hazardous waste and pollution treatment leader. It offers a full spectrum of water,…
Added 4 hours ago
CO
IPRA Intake Specialist
City of Albuquerque
Albuquerque, NM
- $27.22 to $28.26 USD / hour
Plan, prioritize, assign, and supervise the intake and initial processing of public records requests for the Inspection of Public Records (“IPRA”) Division; oversee assigned intake staff,…
Added 4 hours ago
S
Data Entry Operator
STIIIZY
Tolleson, AZ
- From $18 USD / hour
The Data Entry Operator is responsible for intake and inventory of Cannabis product in the manufacturing facility. This position reviews and maintains all manufacturing data and validates…
Added 4 hours ago
Senior AI Product Manager
Jobgether
Remote, United States
At least 2 years of experience within or directly serving the institutional real estate sector, such as an owner-operator, REIT, private equity real estate firm, fund manager, or real…
Added 5 hours ago
Supv Production
Sun Chemical Corporation
Cincinnati, OH
Added 5 hours ago
Supv Production
Sun Chemical Corporation
Cincinnati, OH
Added 5 hours ago
Machine Operator, Seco Slitter, 3rd Shift
H.C. Starck Solutions
Euclid, OH
As a Machine Operator, Seco Slitter, 3rd Shift, you will set up and operate specialized equipment used to slit, shear, and level refractory metal materials to customer specifications.…
Added 5 hours ago
Manufacturing Engineer II (Onsite)
Collins Aerospace
Troy, OH
…in support of production requirements for chemical/special processing (Anodizing, Fluorescent Penetrant Inspection, Etch, Shot Peening and Wastewater Treatment) and paint…
Added 5 hours ago
BG
Cash Processor
BULLDOG GAMING
Kennesaw, GA
- $20 USD / hour
…compliance, Bulldog Gaming is the largest distributed gaming operator, committed to helping its local business partners succeed. We provide video gaming terminals, redemption terminals and…
Added 5 hours ago
HR Manager
Obsidian Security
Palo Alto, CA
The HRM is an owner/operator with range. This role runs employee relations cases end to end, partners with managers on performance and coaching, own lifecycle programs from orientation…
Added 6 hours ago
Lead Surveyor
Pilbara Minerals
Marble Bar, WA
As a leading global lithium producer and owner and operator of the Pilgangoora Operation, the world's largest independent hard-rock lithium mine, we're helping power the clean energy…
Added 6 hours ago
C
Moulding Packer
Cargill
Mount Joy, PA
- $19 USD / hour
As a Packaging Operator, you will operate packaging equipment and perform production tasks with increased independence and efficiency. You will ensure product quality, support…
Added 6 hours ago
Chemical Operator II
Ecolab
Ellwood City, PA
…world in which we all thrive. Ecolab is seekingaChemical Plant Operator IIto join our teaminEllwood City, PA Plant.As a Chemical Plant Operator II,you'llhelp deliver products that support…

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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