SeniorPrincipal Backend Engineer Application (Cortex Platform)

As a Senior Software Engineer on the Cortex Platform Application team you will be a hands-on technical leader responsible for designing building and operating critical backend platform services used across Cortex. This role is for an engineer who can combine deep platform/backend expertise with strong ownership practical execution and cross-team influence. You will help build scalable and reliable services guide technical decisions improve engineering methods mentor engineers and raise the quality of how the team designs ships documents tests and operates its systems. The team owns a broad set of platform capabilities including areas such as application configuration dashboards and reporting infrastructure metrics multi-tenant and MSSP infrastructure log forwarding notifications auditing access and permission engines filtering and querying infrastructure and other shared application platform domains. We are looking for someone who is not only strong technically but also enjoys joining a high-performing team taking ownership from within and helping turn strong execution into repeatable engineering practice. A successful candidate will quickly become a trusted part of the team by shipping meaningful work learning the teams domains and helping others move faster. Over time this person will help the team increase delivery capacity while also improving how work is designed documented tested operated and shared across the organization. The right person will not act as an external advisor or abstract architect. They will join the teams day-to-day work earn trust through execution and help create organized technical influence from inside the team.

• Design build and operate scalable reliable and secure backend services for the Cortex Platform.
• Act as a hands-on technical leader writing and reviewing production code for critical platform services.
• Lead technical design for complex backend and platform domains balancing long-term architecture with practical delivery.
• Own and improve core platform capabilities used by internal engineering teams and Cortex customers.
• Drive operational excellence including observability monitoring alerting incident response reliability and participation in on-call.
• Improve engineering methods around documentation testing design reviews ownership models and production readiness.
• Mentor senior mid-level and junior engineers through design guidance code reviews production work and day-to-day collaboration.
• Collaborate closely with product managers architects security experts QA DevOps and other engineering teams.
• Help internal customers use platform capabilities correctly by creating clarity alignment and practical technical guidance.
• Identify gaps in systems processes and ownership and lead improvements without adding unnecessary process or friction.
• Contribute to a calm practical low-ego engineering culture focused on ownership execution and continuous improvement.

• 5 years of professional experience in backend/platform software development.
• Strong hands-on experience with backend development using languages such as Go Javascript C C# Ruby Python or similar.
• Proven experience designing building and operating large-scale distributed systems in production.
• Strong understanding of software architecture data modeling APIs reliability observability and production operations.
• Experience working in cloud-based environments.
• Ability to lead technical decisions while staying close to the code and implementation details.
• Strong ownership mindset including accountability for production behavior quality and long-term maintainability.
• Experience mentoring engineers and raising technical standards within a team.
• Strong communication skills and ability to influence across teams without relying on authority.
• Practical collaborative low-ego working style.

• Experience with public cloud platforms such as GCP AWS or Azure.
• Experience with Kubernetes Docker CI/CD systems and modern production infrastructure.
• Experience building internal platforms shared services developer platforms or application infrastructure.
• Experience with multi-tenant systems permissions access control configuration systems notification systems auditing metrics or reporting infrastructure.
• Experience leading cross-team technical initiatives.
• Experience improving engineering practices such as testing strategy documentation design processes incident reviews or ownership models.
• Experience in cybersecurity SaaS platforms or enterprise-scale backend systems.