230K–270K USD / year
Staff Software Engineer, Backend MSSP
BackendRemote — US
Published on 2026-10-30
These details were extracted automatically from the original listing. They may not be complete or fully up to date — it's worth checking the original job post.
About this role
Provide hands-on technical leadership for backend capabilities that help partners manage services across multiple customer environments. Lead architecture and implementation for secure multi-tenant workflows, partner administration, and customer account management, while owning production reliability.
About the company
Horizon3.ai is a technology company specializing in cybersecurity solutions, focusing on automated penetration testing and threat detection for enterprises. They provide a range of services aimed at enhancing security posture and risk management for organizations across various sectors.
The team
Enterprise Platform — MSSP + TRPM
Stack
PythonGoJavaTypeScriptSQLPostgreSQLAWSGraphQL
What you'll do
- Set technical direction for partner and multi-tenant platform services.
- Lead implementation of client and sub-client management, asset allocation, and partner administration capabilities.
- Define patterns for tenant isolation, API design, reliability, observability, and operational readiness.
- Lead complex technical work and guide decisions amid ambiguity.
- Collaborate with Product, customer-facing teams, and other engineering groups.
- Mentor engineers through reviews, pairing, and documentation.
- Own production issues and drive reliability improvements.
What we're looking for
- 8+ years of software engineering experience, including deep backend and API experience.
- Track record leading architecture for production multi-tenant, platform, or distributed systems.
- Strong understanding of data modeling, service reliability, and security boundaries.
- Experience building and operating cloud-hosted services and containerized applications.
- Strong SQL, relational data modeling, API design, and production operations experience.
- Ability to lead initiatives, influence across teams, mentor engineers, and communicate technical tradeoffs.
- Bachelor’s degree in a related field or equivalent practical experience.
- Must be a U.S. person and eligible to obtain a U.S. federal security clearance.
Nice to have
- Experience with MSP/MSSP, reseller, white-label, or partner platforms.
- Experience with delegated administration, parent/sub-client models, RBAC, and audit logs.
- Proficiency in Python or Go, PostgreSQL, AWS, GraphQL, Docker, and Kubernetes.
- Cybersecurity or third-party risk management experience, or experience with licensing, entitlements, or compliance.
Benefits
- Stock options
- Health, vision, and dental insurance for employees and their families
- Flexible vacation policy
- Generous parental leave