Principal Software Engineer: Cloud Platform

Job RoleAs a Principal Software Engineer at Radiant, you’ll be a hands-on technical leader, driving the design and development of our most critical systems, including our GPU orchestration layer, inference-serving infrastructure, and core platform APIs.You’ll set the standard for engineering excellence across the team, working closely with other principal engineers to align on strategy and drive technical leadership. You’ll partner with peers in infrastructure and machine learning to deliver high-performance AI systems, and mentor engineers across multiple squads. While you won’t have direct reports, you’ll play a pivotal role in shaping engineering direction, design decisions, and cross-team collaboration.What You’ll Do:Design and develop core services for the Radiant AI CloudArchitect and build core backend services in Go that power AI infrastructure, networking, inference orchestration, and model lifecycle managementLead engineering design efforts across the backend domain - architecture reviews, and system evolution strategiesCollaborate closely with platform and infrastructure to deliver reliable, secure, production-grade servicesDrive technical standards and mentorship, upholding code quality, observability, and maintainability across teamsProactively identify and resolve architectural bottlenecks, performance issues, or scaling challengesWhat you bring:Proven expertise in Golang and cloud-native backend developmentDeep experience designing and deploying distributed systems and APIs (gRPC, REST) in production environmentsStrong knowledge of Kubernetes internals, with deep understanding of primitives, deployments and reconciliation loops.Experience with PostgreSQL or equivalent high-performance data storesExperience with CI/CD workflows, observability, security and automation best practicesDemonstrated ability to lead technically: mentor others, drive architectural thinking, and influence across teamsA bias for action, accountability, and leading by examplePref