# Staff Backend Engineer, MSSP at Horizon3.ai

- Company: Horizon3.ai
- What the company does: Horizon3 uses real-world attacks to safely show what attackers can actually do in your environment—so you can fix and prove what matters. Backed by NEA.
- Company website: https://horizon3.ai/
- Type: Startups (AI role)
- Level: Senior
- Location: US, Remote
- Work setup: Remote
- Pay: $230K to $270K base salary per year (USD)
- Posted: 2026-10-30
- Apply by: 2026-12-14
- Apply: https://jobs.ashbyhq.com/horizon3ai/a976173b-8166-447d-9436-d15242cf4de9?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/horizon3-ai-staff-software-engineer-backend-mssp/

## About the role

As a Staff Backend Engineer on the MSSP & TRPM team, you’ll provide hands-on technical leadership for the NodeZero capabilities that enable partners to manage services across many customer environments. You’ll shape architecture for multi-tenant workflows, account hierarchies, delegated administration, client and sub-client management, and asset allocation or deprecation. You’ll guide designs that preserve tenant boundaries and give partners reliable ways to administer their customer relationships. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- 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

Tags: Engineering

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/horizon3-ai-staff-software-engineer-backend-mssp/