Senior Backend Engineer, Growth & MSSP

The role

You will design and implement backend services for the Growth & MSSP team to manage licensing, entitlements, and provisioning. You will build admin experience infrastructure, MSP/MSSP capabilities, and notification platforms for the NodeZero platform.

What you will do

• Design and implement backend services for licensing, entitlements, and usage limits
• Build and evolve provisioning and onboarding workflows
• Develop admin experience infrastructure including user access controls and RBAC patterns
• Build MSP/MSSP capabilities for asset allocation and sub-client management
• Implement audit logging and event history systems
• Develop the notifications platform for usage warnings and alerts
• Operate services in production including monitoring and incident response
• Contribute production code for design quality and test coverage
• Collaborate with adjacent engineering teams

Required qualifications

• Bachelor's Degree in Computer Science, Computer Engineering, or a related field
• 7+ years of professional software engineering experience using modern object-oriented or functional languages (Python, Go, TypeScript, Java, Scala, C++, etc.)
• Experience building production applications on cloud platforms (AWS, Azure, GCP) using Docker and Kubernetes
• Ability to own and manage concurrent initiatives
• Self-directed and driven
• Strong technical documentation ability
• Effective communication and collaboration across engineering, product, and design
• Interest in mentoring junior and mid-level engineers

Nice to have

• Experience building multi-tenant SaaS platforms with strong tenant isolation
• Hands-on experience with RBAC, authorization, authentication, or SSO systems
• Experience with licensing, subscription, entitlement, usage metering, or billing-adjacent systems
• Experience designing and building audit log or event history systems
• Familiarity with provisioning and feature-access patterns
• Experience building admin consoles or customer self-service workflows
• Experience with MSP, MSSP, or multi-tenant partner models
• Experience with notifications infrastructure
• Production reliability experience including observability tooling and on-call ownership
• Expert proficiency in SQL and experience with relational database architectures (PostgreSQL)

Benefits

• Equity package in the form of stock options
• Health, vision & dental insurance for you and your family
• Flexible vacation policy
• Generous parental leave

About the company

Horizon3 is a remote cybersecurity company dedicated to enabling organizations to proactively find and fix exploitable attack vectors. Their flagship product, NodeZero, delivers autonomous pentests across various cloud environments.