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Added 1 min ago
Engineer Principal – Embedded Software
BAE Systems
Boulder, CO · Westminster, CO · Broomfield, CO
Job Description The Software and Ground Solutions group at BAE Systems Aerospace & Mission Systems (AMS) is looking to expand our team with a talented and energetic software engineer…
Added 1 min ago
Engineer II – Embedded Software
BAE Systems
Broomfield, CO · Westminster, CO · Boulder, CO
Job Description The Software and Ground Solutions group at BAE Systems Aerospace & Mission Systems (AMS) is looking to expand our team with a talented and energetic software engineer…
Added 1 min ago
AI/ML Engineer
BAE Systems
Sterling, VA
We are looking for an AI/ML Engineer to support the design, development, and deployment of intelligent systems that can learn from data, make predictions, classify objects, and generate…
Added 1 min ago
Senior Systems Engineer
KBR Wyle Services, LLC
Beavercreek, OH
Ensure ABMS acquisition processes and documents align with appropriate systems engineering statutory and regulatory requirements.
Added 2 mins ago
Controls Engineer
BorgWarner Turbo Systems LLC
Arden, NC
The Controls Engineer position within this group is primarily responsible for system controls development. The position will also be responsible for guiding and specifying the Software…
Added 3 mins ago
Associate Product Engineer
INDIANA MILLS & MANUFACTURING INC
Westfield, IN
The Associate Product Engineer is an entry-level role supporting the design, development, validation, and launch of transportation safety products and systems. This role focuses on building…
Added 3 mins ago
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Junior AI Engineer
AJAIA
Remote, United States
- $10,000 USD / year
As a Junior AI Engineer at Ajaia, you will build and ship AI-enabled software across client engagements and internal products, working alongside senior engineers who will review your work…
Added 3 mins ago
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AI Engineer
AJAIA
Remote, United States
- $12,500 USD / year
As an AI Engineer at Ajaia, you will build AI-enabled software across both client engagements and internal product initiatives where technical speed, adaptability, and execution quality…
Added 3 mins ago
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Senior AI Engineer
AJAIA
Remote, United States
- $15,000 USD / year
As a Senior AI Engineer at Ajaia, you will lead the technical build of AI systems across client engagements and internal products where speed, adaptability, and execution quality matter.
Added 4 mins ago
Staff Electrical Engineer
Red Cell Partners
Remote, United States
Dash 2 Dynamics (D2) is seeking a Staff Electrical Engineer to lead mixed-signal electrical design for the electronics that enable our plasma-enhanced antenna and communications systems.…
Added 4 mins ago
M
Sustainability Engineer
MacLean-Fogg
Phoenix, AZ
- $106,000 to $130,000 USD / year
OMCO, a MacLean-Fogg Company, is seeking a Sustainability Engineer in Phoenix, AZ, to support the reliability, performance, and continuous improvement of electrical control systems used in…
Added 4 mins ago
ServiceNow Developer
Bespoke Technologies
Chantilly, VA
…deploy custom workflows, including the Sponsors project manager, systems engineer(s), system architect(s) and system…
Added 5 mins ago
Material Planning Analyst - 1st Shift
GXO Logistics
Stillwater, OK
Utilize systems and software to develop and maintain reporting tools to support business decisions
Added 5 mins ago
Test Engineer (Manual)
ECS FEDERAL LLC
QUANTICO, VA
…traditional IT and specialized scientific and operational technology systems to ensure functionality, performance, availability, responsiveness of supported IT systems and services. The…
Added 5 mins ago
Network Engineer
ECS FEDERAL LLC
HUNTSVILLE, AL · QUANTICO, VA
ECS is seeking an experienced Network Engineer to support cutting-edge technology for law enforcement and scientific organizations. The Network Engineer will design, install, maintain, and…
Added 5 mins ago
Senior Software Development Engineer in Test (SDET)
ECS FEDERAL LLC
QUANTICO, VA
Everforth ECS is seeking a Senior Software Development Engineer in Test (SDET) to work in our Quantico, VA office.
Added 5 mins ago
Advanced Software Systems Engineer
General Dynamics Mission Systems, Inc
Boulder, CO
Developing mission-critical systems that help keep people safe is what we do. At General Dynamics Mission Systems, you’ll be part of the team that helps heroes make a true impact. The work…
Added 5 mins ago
Manufacturing Engineer I
Pursuit Aerospace
Manchester, CT
As a Manufacturing Engineer I, you will contribute to process development, quality improvement, NPI, hands on manufacturing and productivity enhancement in a fast-paced aerospace…
Added 7 mins ago
Software Engineer - Site Controller, Energy Storage
Redwood Materials
San Francisco, CA
The Site Controller is the "Central Nervous System" of our modular Battery Energy Storage Systems (BESS). It is the platform that allows us to harmonize new and repurposed batteries into a…
Added 8 mins ago
TD
Professional Engineer 1 (Civil/Transportation) (NYHELPS)
Transportation, Department of
Long Island City, NY
- $121,270 to $133,939 USD / year
…projects and rehabilitation projects utilizing the Department’s software…
Added 8 mins ago
Roadway Design Engineer
Arcadis
New York, NY · Paramus, NJ · NY
As a Roadway Engineer you will have a variety of responsibilities, including the preparation of conceptual designs and construction plans through the utilization of OpenRoads design…
Added 10 mins ago
Staff Engineer - Backend/Java (REMOTE)
Fanatics Betting & Gaming
NY
As a Backend Staff Engineer at Fanatics Core, you are a recognized technical leader. You operate both strategically and hands-on while leading ambitious projects, and your solutions set the…
Added 10 mins ago
C
AI Engineer
Claro
Remote, United States
- $100,000 to $110,000 USD / year
The AI Engineer is responsible for building and deploying AI agents (Microsoft Copilot and Claude) and private retrieval-augmented generation (RAG) applications. This role requires…
Added 11 mins ago
Senior Systems Engineer
R.J. Corman Railroad Group
Nicholasville, KY
R.J. Corman Signaling Company is searching for a Senior Systems Engineer in Nicholasville, KY. This role leads the design, development, testing, and support of complex electrical and…
Added 13 mins ago
Lead AI Engineer - NBA
Humana
Jefferson City, MO
The Lead AI Engineer owns the design and delivery of the NBA platform's agentic AI capabilities. This is a hands-on engineering role first - you are expected to be a significant individual…

Horizon3

Principal Backend Engineer, Enterpise Platform

Remote, United States

$255,000 to $295,000 USD / year

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Job details

Pay: $255,000 to $295,000 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 Principal Software Engineer on the Enterprise Platform team, you’ll set technical direction for foundational services that power NodeZero’s customer and partner experiences. You’ll help shape how the platform manages licensing and entitlements, account administration, onboarding and provisioning, notifications, and asset workflows for managed service and security providers.

You’ll guide architecture and execution across teams, partnering with Engineering, Product, and business leaders to make complex platform capabilities secure, reliable, and operable at scale. This is a hands-on individual-contributor role with company-wide technical influence; you’ll develop other technical leaders through mentorship and technical guidance, not formal people management.

Responsibilities

Set long-term technical direction for Enterprise Platform capabilities, including licensing and entitlements, user access and account administration, onboarding and provisioning, product and usage notifications, and MSP/MSSP client and sub-client workflows.
Guide architecture for multi-tenant services and account models, including parent-child relationships, permissions, product access, usage limits, and asset allocation across customer and partner accounts.
Partner with Engineering, Product, and business leaders to shape technical priorities and investment decisions; make clear tradeoffs across customer value, security, reliability, scale, delivery speed, and maintainability.
Lead high-impact, cross-team technical initiatives from ambiguous problem to durable solution, establishing the design principles and outcomes teams can execute against.
Stay close to implementation through design reviews, code reviews, technical investigation, and hands-on contributions to critical systems where useful.
Improve production reliability and supportability through testing, observability, monitoring and alerting, safe rollout practices, incident learning, and clear runbooks and support documentation.
Help balance product delivery with operational support, on-call health, and long-term platform investment.
Mentor senior engineers and technical leaders, and create reusable technical guidance that raises engineering quality across teams.
Communicate architecture, risks, and decisions clearly to technical and non-technical stakeholders.

What You’ll Bring

A record of sustained technical impact across multiple teams, including contributions that shaped company-level technical direction.
Deep experience with backend services or multi-tenant SaaS platforms, including production ownership of business-critical systems.
Strong architectural judgment across complex data models, distributed systems, security, reliability, and scalability tradeoffs.
A history of earning trust with senior technical, product, and business partners through clear communication and sound decisions.
A track record of raising engineering quality and developing senior technical talent through influence and mentorship.

Required Education / Experience

Bachelor’s degree in Computer Science, Computer Engineering, or a related field, or equivalent practical experience.
Extensive professional software engineering experience building and operating production backend services.
Demonstrated technical leadership and impact beyond a single team.
Experience designing APIs and data models for multi-tenant or customer-facing SaaS systems.

Required Tech Stack Experience

Deep experience building and operating backend services in a modern language such as Python, Go, Java, or TypeScript.
Strong SQL and relational data modeling experience, along with API and service design for production systems.
Experience building cloud-hosted services and operating containerized applications such as Docker; familiarity with Kubernetes or a comparable orchestrator.
Experience with every example technology is not required; depth in relevant areas and the ability to make sound technical choices are important.

What Sets You Apart?

Experience with MSP/MSSP, reseller, or other partner software models.
Experience with account hierarchies, delegated administration, tenant isolation, or role-based access control (RBAC).
Experience with licensing, entitlements, asset allocation, usage limits, or product notifications.
Experience with Python or Go, AWS, PostgreSQL, GraphQL, Docker, and Kubernetes.
A history of leading platform or architecture changes that improved reliability, delivery speed, developer effectiveness, or customer outcomes across an organization.

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 $255,000 - $295,000 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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