Staff Software Engineer, Partner Integrations

Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find and 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 ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs. 

We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools, 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.

The Expert Engineer on the Partner Integrations team is the technical anchor for how NodeZero connects to the security ecosystem. Our integrations with CrowdStrike, SentinelOne, Splunk, ServiceNow, and dozens of other platforms are how customers turn NodeZero findings into action — they're not an afterthought, they're a core part of the product. You will set the technical direction for integration architecture, define the reliability and observability standards the team builds to, and own the most complex integration surfaces personally.

This is a hands-on staff-level role. You will write production code, produce architecture designs, mentor engineers, and be the person your team and the Engineering Manager turn to when a hard problem doesn't have an obvious answer. The team is building a portfolio of integrations on a shared framework — your job is to make that framework excellent and ensure every integration built on it is reliable enough that customers never have to think about it. This role reports to the Partner Integrations Engineering Manager.

Responsibilities

• →

Integration Engineering

• 8+ years of professional software engineering experience with deep specialization in building production integrations, connectors, or API platforms

• Expert-level understanding of API integration patterns: OAuth 2.0 / API key authentication lifecycle, webhook delivery and reliability, idempotency, pagination, rate limiting, partial failure handling, and schema evolution

• Track record building integrations with major security platforms (EDR, SIEM, SOAR, ITSM) or comparable enterprise SaaS ecosystems — you know what it takes to make a connector that holds up in production

Backend & Systems

• Expert proficiency in Go or Python — this team's primary languages

• Strong grasp of distributed systems reliability patterns applicable to integration infrastructure: at-least-once delivery, dead-letter queues, circuit breakers

• Experience designing and operating integration observability: structured logging, metrics, alerting, and dashboards that surface failures before customers do

• Comfort in cloud-native and containerized environments (Kubernetes, AWS)

Technical Leadership

• Track record of setting engineering standards that other engineers adopt — not just writing good code but making the right approach the obvious one

• Ability to produce clear architecture documents and drive technical decisions across team and partner boundaries

• Experience mentoring mid-level engineers through design review and code review

• Hands-on experience with any of Horizon3's integration partners: CrowdStrike Falcon, SentinelOne, Splunk, ServiceNow, Jira, or similar enterprise security and ITSM platforms

• Background in the cybersecurity ecosystem — understanding how SOC teams, MSSPs, and security engineers actually use the tools NodeZero integrates with

• Experience designing field-mapping schemas for cross-platform data translation

• Familiarity with integration certification processes (vendor marketplace programs, partner API agreements)

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

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, 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.

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. 

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.