Staff Software Engineer, Partner Integrations

OpenKrill; United States; Hybrid; USD 230,000 - 260,000; Full time

Benefits offered by this job

Equity package

Health, vision & dental insurance

Flexible vacation policy

Parental leave

Job summary

Horizon3, a remote cybersecurity company, seeks an Expert Engineer for the Partner Integrations team. You will anchor how NodeZero connects to the security ecosystem, setting architecture direction, reliability standards, and owning complex integration surfaces.

This staff-level role involves hands-on coding, architecture design, and mentoring engineers. You will work on a portfolio of integrations on a shared framework, ensuring every integration remains reliable for customers.

Qualifications

• 8+ years of professional software engineering experience with production integrations or API platforms.
• Expert-level understanding of API integration patterns (OAuth, webhooks, idempotency, pagination, rate limiting).
• Track record building integrations with major security platforms (EDR, SIEM, SOAR, ITSM) or enterprise SaaS ecosystems.

Responsibilities

• Design and own the technical framework for Partner Integrations connectors, including authentication lifecycle, event delivery, retries, and observability.
• Lead high-complexity integrations with platforms that have complex auth flows or high-volume event schemas.
• Define reliability and observability standards; enforce through code and design reviews.
• Maintain deep knowledge of partner APIs and event models; be the reference point when docs are not enough.
• Mentor mid to senior engineers through design and code reviews; drive architectural decisions.

Skills

8+ years experience

API integration patterns

Security integrations

Go

Python

Tools

Go

Python

Job description

Get to Know Us

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.

What You'll Do

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 Architecture: Design and own the technical framework that all Partner Integrations connectors are built on — authentication lifecycle, event delivery semantics, retry and idempotency patterns, schema mapping, and observability
• High-Complexity Integrations: Own direct implementation of the most technically demanding integration surfaces — platforms with complex auth flows, high-volume event schemas, or sensitive customer data handling requirements
• Reliability Standards: Set the reliability and observability bar for the team: define what a production-ready integration looks like, write the review checklist, and enforce it through code review and design review
• Partner API Expertise: Maintain deep knowledge of the APIs and event models of Horizon3's most important integration partners; be the team's reference point when the documentation isn't enough
• Mentorship: Mentor P3 and P4 engineers through design review, code review, and pairing; be the person who turns a good engineer into a great integration engineer
• Incident Response: Own complex integration failures — diagnose root causes, coordinate with partner engineering teams when needed, and build the fixes that prevent recurrence

What You'll Bring

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

Nice to Haves

• 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)

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: $229,500 - $260,000 annually. The exact salary will be determined based on the selected candidate's location, qualifications, experience, and relevant skills.
• Additional compensation: All fulltime 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, 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 bel