Senior Backend Engineer, Licensing

The role

You will build services that determine customer purchases, enabled capabilities, and usage limits. You will own work across product packaging, entitlements, and usage workflows for direct and partner accounts.

What you will do

• Design, build, and maintain services and APIs for customer purchases, packaging, capabilities, and usage limits.
• Own features from technical design through implementation, testing, rollout, and production operation.
• Build and evolve entitlement and usage workflows for direct and MSP/MSPP account models.
• Partner with Product and adjacent teams to define interfaces and resolve edge cases.
• Improve tests, observability, design documentation, runbooks, and support playbooks.
• Investigate production issues across service boundaries and implement durable fixes.
• Review code and design proposals and share context with other engineers.

Required qualifications

• Bachelor’s degree in Computer Science, Computer Engineering, or a related field, or equivalent practical experience.
• 7+ years of professional software engineering experience building and operating backend software.
• Experience with a modern backend language such as Python, Go, Java, or TypeScript.
• Experience designing APIs and data models for business-critical services or customer-facing workflows.
• Strong SQL and relational database experience, including data integrity and production troubleshooting.
• Experience with cloud-hosted services and containerized applications such as Docker.
• Familiarity with Kubernetes or a comparable orchestrator.
• Strong foundation in testing, observability, and ownership of production services.

Nice to have

• Experience with licensing, entitlements, subscriptions, usage metering, billing-adjacent workflows, or feature access controls.
• Experience with multi-tenant SaaS, account hierarchies, RBAC, or partner account models.
• Experience with Python or Go, PostgreSQL, GraphQL, AWS, and event-driven or distributed systems.
• Familiarity with Kafka or other event-streaming systems, workflow tools such as Temporal or Prefect, and production observability platforms.

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, fix and verify exploitable attack vectors. Their flagship product is the NodeZero platform.