Senior Backend Engineer, Admin Experience

horizon3ai; United States; Remote; USD 140,000 - 190,000; Full time

Job summary

horizon3ai is building a multi-tenant cybersecurity platform and seeks a senior backend engineer to design, build, and operate backend services and APIs for users, accounts, and security settings. You will own features end-to-end from design through production support, partnering with product and frontend teams.

The role emphasizes secure authorization, data modeling for tenant hierarchies, and improving service reliability, observability, and performance, with a focus on testing and production

Qualifications

• Bachelor’s degree or equivalent practical experience.
• 7+ years of professional software engineering experience.
• Experience designing and operating backend services and APIs from design to production.
• Strong SQL and relational database skills.
• Experience with cloud platforms and containerized apps like Docker.
• Focus on testing, reliability, observability, and end-to-end ownership.

Responsibilities

• Design, build, and operate services and APIs for user access, account relationships, settings, and administration.
• Own features through implementation, testing, safe release, observability, and ongoing support.
• Apply secure authorization and sound data modeling to tenant and parent-child account workflows.
• Diagnose production issues and improve service reliability, performance, and monitoring.
• Write and review maintainable code, automated tests, design documents, runbooks, and support guidance.
• Collaborate across product and engineering teams, and help teammates grow through reviews and design discussions.

Skills

SQL proficiency

Relational databases

Data modeling

Testing

Observability

End-to-end ownership

Docker

Cloud platform

Communication

Python

Education

Bachelor's degree

Tools

Docker

Kubernetes

GraphQL

PostgreSQL

Job description

Role overview

Build backend services and APIs that let organizations manage users, accounts, and security settings in a multi-tenant cybersecurity platform. The work includes access controls, account hierarchies, roles, and audit records, with responsibility extending from technical design to rollout and production support. You’ll partner with product, frontend, and platform engineers to deliver administration workflows that are secure and consistent.

Responsibilities

• Design, build, and operate services and APIs for user access, account relationships, settings, and administration.
• Own features through implementation, testing, safe release, observability, and ongoing support.
• Apply secure authorization and sound data modeling to tenant and parent-child account workflows.
• Diagnose production issues and improve service reliability, performance, and monitoring.
• Write and review maintainable code, automated tests, design documents, runbooks, and support guidance.
• Collaborate across product and engineering teams, and help teammates grow through reviews and design discussions.

Requirements

• Bachelor’s degree in computer science, computer engineering, or a related area, or equivalent practical experience.
• At least seven years of professional software engineering experience building production software.
• Experience designing and operating backend services and APIs, including taking complex work from design into production.
• Strong SQL and relational database skills, including data modeling and query debugging or optimization.
• Experience with a cloud platform and containerized applications such as Docker.
• Focus on testing, production reliability, observability, clear communication, and end-to-end ownership.

Nice to have

Experience with multi-tenant SaaS, role-based access control, single sign-on, audit logs, delegated administration, or account hierarchies. Familiarity with Python or Go, PostgreSQL, GraphQL, Kubernetes, or CI/CD is also useful.