Senior Backend Engineer, Data & App Platform

The posting, as Horizon3 wrote it

Get to Know Us

Horizon3 http://Horizon3.ai 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.

As a remote first company, we require minimum 25Mbps consumer grade broadband connection.

WHAT YOU'LL DO

The Pentest Data Platform (PDP) team owns the shared data platform that ingests NodeZero output from ephemeral operations and delivers it into durable storage, increasingly, in near real time. The team's core mandate is to build a scalable, event-driven architecture that makes operational insights available in near real-time, not just after it finishes.

PDP is a foundational, platform-oriented team whose outputs power core user experiences within the NodeZero security platform. PDP owns the data contracts and internal data services that everything else is built on top of.

NodeZero generates large volumes of structured pentest telemetry: hosts, findings, attack paths, credentials, weaknesses, and relationship graphs. PDP is responsible for turning that raw telemetry into coherent, durable, and queryable records that downstream teams can build on reliably at enterprise scale.

The team is driving the largest architectural change in Horizon3's history: reworking pentest data processing from a batch-centric monolith into a real-time, event-driven microservice architecture. There is existing code to understand, live customers to protect, and hard distributed-systems problems to solve, all at the same time.

In this role, you will

• Own event-driven pipelines end to end — design, build, and operate streaming services that ingest, distribute, and process pentest operation results, including streaming and batch ETL, aggregation services, schema migrations, and replayable processing.
• Solve real-time asset identity problems — work on asset matching, asset counting, and cross-operation reconciliation, including reducing false split

[…]
Work: We are a 100% remote company. Enjoy the flexibility to work in the way that supports you and brings out your best.

• 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

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