Staff Backend Engineer, MSSP

The role

You will provide technical leadership for NodeZero capabilities that enable partners to manage services across customer environments. You will shape architecture for multi-tenant workflows, account hierarchies, and delegated administration.

What you will do

• Set technical direction for partner and multi-tenant platform services
• Lead architecture and implementation of complex capabilities for client and sub-client management
• Define patterns for secure data boundaries, API design, reliability, observability, and operational readiness
• Remain hands-on in complex technical work
• Partner with Product, customer-facing teams, and adjacent engineering groups
• Mentor engineers through design reviews, code reviews, pairing, and technical documentation
• Own complex production issues and drive improvements

Required qualifications

• Bachelor’s degree in Computer Science, Computer Engineering, or a related field, or equivalent practical experience
• 8+ years of professional software engineering experience, including deep experience with backend systems and APIs
• Track record of leading architecture or technical direction for production multi-tenant, platform, or distributed systems
• Strong understanding of data modeling, service reliability, and security boundaries in customer-facing systems
• Ability to influence decisions across teams, mentor engineers, and communicate technical tradeoffs clearly
• Experience building and operating cloud-hosted services and taking ownership of production outcomes
• Deep experience building backend services in a modern language such as Python, Go, Java, or TypeScript
• Strong SQL and relational data modeling, API design, and production service-operating experience
• Experience with cloud-hosted systems and containerized applications such as Docker
• Familiarity with Kubernetes or a comparable orchestrator

Nice to have

• Deep experience with MSP/MSSP, reseller, white-label, or partner software platforms
• Experience with delegated administration, parent/sub-client account models, tenant isolation, RBAC, and audit logs
• Strong proficiency in Python or Go, SQL/PostgreSQL, AWS, GraphQL, Docker, and Kubernetes
• Background in cybersecurity or third-party risk management, licensing, entitlements, or compliance-adjacent capabilities

Benefits

• equity package in the form of stock options
• health, vision & dental insurance for you and your family
• flexible vacation policy
• generous parental leave

Before you apply

• Only US persons can interview for this role due to security clearance requirements
• Employee must be eligible for and successfully secure a US Federal Security Clearance as a condition of employment

About the company

Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix and verify exploitable attack vectors. Their flagship product is the NodeZeroTM platform.