Jobs in the United States

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Added 2 mins ago
Principal Marketer Specialist
Medtronic
Lafayette, CO
Develop and execute the global thoracic procedural marketing strategy in alignment with business objectives and annual operating plans.
Added 2 mins ago
Global Product Manager - Pediatric Spine Portfolio
Medtronic
Lafayette, CO
Track key performance indicators and provide insights and recommendations to support portfolio performance, strategic decision-making, and annual operating plan development.
Added 2 mins ago
O
Senior Platform Software Engineer - OCI
Oracle
Denver, CO
- $92,500 to $209,500 USD / year
Oracle Cloud Infrastructure (OCI) is looking for a Senior Platform Software Engineer to join the PKI team responsible for building and operating cloud-scale Public Key Infrastructure…
Added 2 mins ago
XE
Director Fleet Overhaul Management (Energy Supply)
Xcel Energy
Platteville, CO · Henderson, CO · Denver, CO
- $148,400 to $210,733 USD / year
Xcel Energy is a place where you’ll have opportunities to grow, expand your skills, and help lead the clean energy transition. We offer meaningful rewards, recognition, and support to help…
Added 3 mins ago
C
Regional Maintenance Manager
CBRE
Denver, CO
- $200,000 to $210,000 USD / year
The purpose of this position is to lead a large portfolio or client account and provide senior technical and operational support to the account staff for the development of policies and…
Added 10 mins ago
Software Engineer (Edge - Networking & Fleet)
Jobgether
Remote, United States
…applications and next steps. Our partner is looking for a Software Engineer (Edge – Networking & Fleet) based in United…
Added 17 mins ago
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Senior Platform Software Engineer - OCI
Oracle
Charleston, WV
- $92,500 to $209,500 USD / year
Oracle Cloud Infrastructure (OCI) is looking for a Senior Platform Software Engineer to join the PKI team responsible for building and operating cloud-scale Public Key Infrastructure…
Added 17 mins ago
C
Regional Maintenance Manager
CBRE
Charleston, WV
- $200,000 to $210,000 USD / year
The purpose of this position is to lead a large portfolio or client account and provide senior technical and operational support to the account staff for the development of policies and…
Added 22 mins ago
Data Engineer
Sedgwick Claims Management Services Inc.
Telecommuter, TX
Operating as a “day‑one” builder, the Gen AI Engineer designs and delivers data pipelines that bridge legacy on‑premise systems - including mainframes, SQL Server, and DB2 - with modern…
Added 25 mins ago
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Senior Platform Software Engineer - OCI
Oracle
Indianapolis, IN
- $92,500 to $209,500 USD / year
Oracle Cloud Infrastructure (OCI) is looking for a Senior Platform Software Engineer to join the PKI team responsible for building and operating cloud-scale Public Key Infrastructure…
Added 25 mins ago
Area Engineer - Small Molecule Building - Lilly Medicine Foundry
Lilly
Lebanon, IN · Indianapolis, IN
…the needs of internal customers and/or the business. The Area Engineer will also be responsible for driving continuous improvement initiatives and managing both annual operating expenses…
Added 25 mins ago
Scientist/Engineer – Small Molecule Technical Operations - Lilly Medicine Foundry
Lilly
Indianapolis, IN · Lebanon, IN
In the pre-startup phase, the Scientist/Engineer – Technical Operations will contribute heavily to Operational Readiness activities for the new facility supporting technical processes, tech…
Added 25 mins ago
C
Regional Maintenance Manager
CBRE
Indianapolis, IN
- $200,000 to $210,000 USD / year
The purpose of this position is to lead a large portfolio or client account and provide senior technical and operational support to the account staff for the development of policies and…
Added 32 mins ago
Lead Database Administrator (Remote EST - United States)
Partnerize
Remote, United States
As a database engineer, you will operate with a high degree of autonomy, acting as the principal technical authority and taking end-to-end ownership of our database estate. You will be a…
Added 35 mins ago
Infrastructure Engineer III
JPMC page
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As an Infrastructure Engineer III at JPMorganChase within the Corporate Sector – Infrastructure Platforms, you utilize strong knowledge of software, applications, and technical processes…
Added 39 mins ago
Lead Laser Ablation Process Engineer
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Auburn, AL
…autonomy but is focused on execution of activities within an operating discipline covered by standard functional practices and procedures. In this role, you will lead process engineering…
Added 40 mins ago
Senior ETL & Data Migration Engineer
CGI Technologies and Solutions, Inc.
Huntsville, AL
CGI Federal is seeking a Senior ETL & Data Migration Engineer to lead high complexity extract, transform, and load (ETL) operations supporting a major federal modernization program. This…
Added 40 mins ago
Sr. Data Migration Engineer
CGI Technologies and Solutions, Inc.
Huntsville, AL
CGI Federal is seeking a Senior Data Migration Engineer to lead complex data extraction, transformation, validation, and migration activities within a major federal modernization program.…
Added 40 mins ago
Data Engineer – Senior
CGI Technologies and Solutions, Inc.
Huntsville, AL
CGI Federal is seeking a Senior Data Engineer to support large scale data engineering and migration activities for a major federal modernization program. This role is responsible for…
Added 40 mins ago
Sr. Data Migration SME
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Huntsville, AL
CGI Federal is seeking a Senior Data Migration IT Subject Matter Expert to lead the end to end migration of highly sensitive, mission critical datasets as part of a national priority…
Added 47 mins ago
Asset Manager Systems Integration/Test Engineer
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Grand Prairie, TX · Grand Prairie
…searching for a highly motivated Systems Integration and Test Engineer to support a program's engineering systems integration, and system qualification team initiatives. This individual…
Added 51 mins ago
Reliability Engineer Sr - E3
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Huntsville, AL · Huntsville
…and development projects. This position is for a Reliability Engineer to support the LRHW System Engineering, Integration & Test…
Added 53 mins ago
Field Sales Support Systems Engineer - E2
Lockheed Martin
Fort Worth, TX · Fort Worth
…aides through cross-functional collaboration. The role involves operating 3D printers per engineering documents, managing tool kit preparation for Product Support Engineering, and…
Added 53 mins ago
Field Engineer - E2
Lockheed Martin
San Diego, CA · San Diego
…requested by the Supplier, Field Service Manager, Field Service Lead or Program…
Added 53 mins ago
Software Quality Engineering Sr Staff - E5
Lockheed Martin
Fort Worth, TX · Fort Worth
This position is for an F-16 Software Quality Engineer Team lead. Develops, modifies and applies quality principles to the development and use of software and software-based systems for…

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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