Senior Software Engineer, Java | Endpoint State & Control

NinjaOne is investing in a new Endpoint State and Control team, and they're looking for a Senior Software Engineer, Java to help build its server-side foundation from the ground up. This role involves designing systems that manage policy, ingest telemetry from endpoints at scale, and enforce multi-tenant isolation for a platform serving customers globally.

Responsibilities:

• Design and build the server-side infrastructure for the Endpoint State and Control team, including the policy management service, agent-facing APIs for policy delivery, event/log ingestion from endpoints, and the data model for rules, configs, and telemetry
• Define service architecture, API contracts, and data storage strategy from the ground up, with no existing prior art to constrain you
• Collaborate closely with the engineer who owns agent/driver-level work and the engineer who owns the management console UI to keep contracts and constraints aligned across the stack
• Design and enforce multi-tenant data isolation patterns — per-tenant scoping, parameterized queries, no shared state — as a foundational concern, not an afterthought
• Design for high-volume event ingestion from distributed endpoints, balancing storage efficiency with the need for customers to query that data reliably
• Write technical design documents, drive cross-functional alignment, and lead backend technical design as requirements evolve
• Other duties as needed

Requirements:

• 5+ years of backend Java/Kotlin engineering
• Strong Java 11+ skills, with Kotlin preferred — or a demonstrated ability and willingness to ramp quickly, since new NinjaOne code is Kotlin-first
• Experience designing RESTful APIs for multi-tenant SaaS platforms
• Experience with PostgreSQL or an equivalent relational database
• Comfortable with multi-tenant data isolation patterns and designing backend systems from scratch — defining data models, API shapes, and service boundaries with limited prior art
• Comfortable operating in ambiguous problem spaces where requirements are partially defined and will evolve
• Demonstrated ability to lead backend technical design: writing architecture documents, defining API contracts, and driving cross-functional alignment
• Curious about and comfortable experimenting with AI tools as part of your development workflow
• Experience designing event ingestion pipelines from distributed endpoints (agent telemetry, log aggregation, high-volume event storage)
• Experience with RBAC/permission enforcement in a multi-tenant backend
• Experience with message queues (RabbitMQ, Kafka, or SQS) for async event processing
• Accessibility compliance experience in enterprise B2B products
• Prior work in endpoint management, IT operations, or security tooling