Top Principal Software Engineer Jobs in Los Angeles, CA

Lead technical direction and architecture for mobile and enterprise solutions, remain hands‑on in critical systems, mentor senior engineers, drive CI/CD/DevSecOps, evaluate and integrate vendor and AI technologies, and establish engineering standards to improve quality, reliability, and delivery across programs.

Serve as technical lead between NVIDIA and hyperscale CSPs on GPU firmware and system software. Drive firmware update orchestration, recovery procedures, multi-GPU coordination, telemetry/health monitoring, and incorporate CSP feedback into NVIDIAs roadmap to improve fleet-scale manageability and reliability.

Lead technical engagements with cloud service providers on rack-scale system software and firmware. Drive architecture alignment, integration readiness, error handling and recovery, health telemetry, firmware orchestration, and serviceability. Capture CSP feedback, influence NVIDIA system software design, improve tooling and tests, and mitigate execution risks through early collaboration.

The role involves leading initiatives for vector search in Elasticsearch, enhancing features, resolving bugs, and contributing to community engagements in a distributed team setting. A strong background in vector similarity and Java is crucial.

The Principal Software Engineer will lead the design and build-out of an AI Context Layer, ensuring high-quality data for AI systems, while managing access control and developer interfaces, and leading cross-team projects.

Design, implement, and maintain high-quality, highly available microservices for Azure Messaging and Fabric. Drive AI adoption to improve development practices, optimize system IO and performance, and lead innovation in product and engineering processes while following rigorous development and security screening practices.

Lead design and implementation of large-scale Pub/Sub and messaging services within Azure Event Grid/Microsoft Fabric. Define scalable, reliable architectures, drive testing and CI/CD automation, build developer tooling, mentor engineers, manage incident response and operational excellence, and collaborate with PMs, EMs, researchers, and customers to deliver production-ready cloud services.

The Principal Software Engineer will define and drive architectural solutions for streaming media across Disney's platforms, lead cross-functional collaborations, and champion best practices in system design and operational excellence.

The Principal Software Engineer will lead the architectural direction and improvement of metadata management systems for Disney's streaming services, leveraging advanced technologies and best practices in software development.

Lead technical vision and architecture for Dockers Developer Tools: build a self-service internal platform, CI/CD and build systems, integrate AI/LLM agents, set SDLC tenets, establish standards for observability, security, reliability, and productize internal tooling into customer offerings.

Lead technical direction for a major product domain, reduce architectural debt, mentor engineers, standardize AI-agent workflows, and design scalable backend solutions integrating LLMs and cloud services. Drive cross-team RFCs, cookbook standards, and adopt agentic AI tooling while balancing security, quality, and delivery.

Lead the technical vision and architecture of simulation software for spacecraft, focusing on multi-physics modeling and real-time execution, while driving engineering standards and mentoring teams.

Lead platform strategy, architecture, and hands-on development. Design, build, deploy, and operate high-performance, fault-tolerant integrations and platform enhancements. Drive security/compliance, mentor engineers, recruit senior talent, align technology with business goals, and communicate technical vision to stakeholders.

Design and implement scalable full-stack solutions for institutional platforms. Lead API and microservices design, cloud (AWS) deployments, CI/CD and DevSecOps, collaborate with product and QA, troubleshoot production, and mentor distributed teams.

Design, architect, and build enterprise Java microservices and APIs; lead technical delivery, mentor engineers, implement cloud-native and CI/CD practices, design database schemas and PL/SQL, and develop blockchain/digital-asset solutions including smart contract work and lifecycle integration in financial services.

Lead end-to-end design, development, and quality of cloud-based enterprise software solutions for caregivers. Define quality criteria, estimate costs, manage risks and engineering processes, integrate systems, and act as technical leader across large, complex projects.

Lead architecture and development of large-scale VM management and monitoring platforms for Azure. Provide technical leadership, design documentation, debugging, performance tuning, operational excellence, mentoring, on-call monitoring, and adoption of AI-assisted workflows to improve reliability, availability, security, and observability across Windows and Linux environments.

As a Principal Flight Software Engineer, you will lead the architecture and development of flight software for space missions, ensuring safety and reliability while collaborating on technical decisions and standards.

Drive architecture and technical vision for Elasticsearch core storage and query engine. Lead performance and storage-efficiency improvements, design indexing/serialization/data layouts, mentor engineers, coordinate cross-organizational initiatives, triage community issues, and write idiomatic modern Java for logs and metrics workloads.

Lead frontend technical direction for the Trellis design system: design and build a production component library, define accessibility and theming models, create tooling and migration pipelines (codemods, refactoring automation), leverage AI coding agents, mentor senior engineers, and partner with PM/UX to drive frontend architecture and adoption across product teams.

As a Principal Software Engineer, you'll lead development on a new game, ensuring quality and execution through close collaboration with teams, optimization, and best practices in engineering.

Lead architecture, modernization, and development of Group Insurance applications. Modernize mainframe monoliths into Java microservices and micro-frontends on cloud, mentor distributed Agile teams, collaborate with enterprise architecture, product owners and infrastructure, and enable test automation and integrations. Approximately 10% domestic travel.

Designs and implements enterprise Java (JEE) solutions and microservices in an Agile environment. Collaborates with systems, cloud, DevSecOps, and test teams across the SDLC to prototype, build, test, and release GUI and backend services. Requires Top Secret clearance and SAP/PAR access, on-site work in San Diego or El Segundo, and periodic travel.

Develop and deliver Java/JEE enterprise software in a SOA environment across the full SDLC. Work with JMS, web services, XML technologies, and collaborate with systems, hardware, and integration/test engineers. On-site role requiring Top Secret clearance and up to 25% travel.

Lead the development and maintenance of high-performance cross-platform desktop and mobile applications for HiFi audio. Drive technical direction, mentor team members, and innovate audio streaming solutions while ensuring product scalability and performance.