PrincipalFullStackEngineer

# Job Description: Principal Full Stack Engineer – OpenBlue ## ## Role Overview Johnson Controls’ OpenBlue platform is transforming the built environment through smart, connected, AI-driven systems. We are looking for a Principal Full Stack Engineer to play a key technical leadership role in designing and scaling OpenBlue’s next-generation digital products. This role will define architecture and engineering best practices for cloud-native, IoT-enabled, data-intensive, and AI-driven applications used across buildings, campuses, and enterprise ecosystems. As a Principal Engineer, you will work across multiple product teams, partnering closely with architects, platform teams, and engineering leaders to drive innovation, reliability, and performance across the OpenBlue technology stack. ## ## Key Responsibilities ## ## Platform & Architecture Leadership \- Lead architecture and design of scalable, secure, and resilient solutions across the OpenBlue ecosystem—including IoT data ingestion pipelines, digital twin systems, and smart-building applications. \- Define and guide modernization initiatives: microservices, event-driven architecture, API unification, observability, and data platform integrations. \- Collaborate with Enterprise Architecture to align product design with OpenBlue platform strategy and reference architectures. ## ## Full Stack Engineering Excellence \- Provide hands-on expertise across the entire stack: frontend UIs, backend microservices, cloud-native solutions. \- Influence design and implementation of core capabilities such as identity, tenant management, configuration services, and data interoperability. ## ## IoT, Digital Twin & Data Systems \- Work with teams building digital twins, telemetry processing, device management, and rules engines. \- Shape engineering patterns for device-to-cloud and cloud-to-edge communications. \- Guide integration between OpenBlue cloud services and hardware/controls products. ## ## Mentorship & Cross-Functional Col