Staff Software Engineer, Backend MSSP
Horizon3 AI1 day ago
Remote, United StatesStaff+
Base Salary
$230k - $270k/yr
Responsibilities
- Set technical direction for partner and multi-tenant platform services, including account hierarchies, tenant isolation, delegated administration, and partner workflows.
- Lead architecture and implementation for client and sub-client management, asset allocation or deprecation, and partner administration.
- Define patterns for secure data boundaries, API design, reliability, observability, and operational readiness.
- Remain hands-on in complex technical work and guide decisions involving ambiguous requirements and tradeoffs.
- Collaborate with Product, customer-facing teams, and adjacent engineering groups to align platform capabilities with partner needs.
- Mentor engineers through design reviews, code reviews, pairing, and technical documentation.
- Own complex production issues and improve service reliability and recurrence prevention.
Requirements
- 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 backend systems and API experience.
- Track record leading architecture or technical direction for production multi-tenant, platform, or distributed systems.
- Strong understanding of data modeling, service reliability, security boundaries, and customer-facing systems.
- Ability to lead broad technical initiatives, influence decisions across teams, mentor engineers, and communicate technical tradeoffs.
- Experience building and operating cloud-hosted services and containerized applications while owning production outcomes.
- Deep experience with a modern backend language such as Python, Go, Java, or TypeScript.
- Strong SQL, relational data modeling, API design, and production service-operating experience.
- Experience with cloud-hosted systems and Docker; familiarity with Kubernetes or a comparable orchestrator.
- Experience with MSP/MSSP, reseller, white-label, or partner software platforms is preferred.
- Experience with delegated administration, parent/sub-client account models, tenant isolation, RBAC, and audit logs is preferred.
- Background in cybersecurity or third-party risk management, licensing, entitlements, or compliance-adjacent capabilities is preferred.
- Only US persons can interview, and the employee must be eligible for and successfully secure a US Federal Security Clearance as a condition of employment.
Benefits
- Fully remote company; the role may require up to 5% travel.
- Full-time roles are eligible for an equity package in the form of stock options.
- Benefits include health, vision, and dental insurance for employees and their families, flexible vacation, and generous parental leave.
- The company supports remote and hybrid work models depending on role and location, including a Chicago office where some roles require regular in-office presence.
- The company offers career development opportunities and an inclusive, collaborative work culture.
Tech Stack
Categories
About Horizon3 AI
Horizon3 AI builds NodeZero, a proactive security platform that autonomously performs penetration testing and validates attack paths across on‑prem, cloud, and hybrid environments. The company sells its software by subscription to security and IT teams at enterprises and government agencies, helping prioritize and verify fixes. Founded in 2019 and headquartered in San Francisco, it is privately held and serves customers across regulated industries and the public sector.