Top Principal Engineer Jobs in Los Angeles, CA

Perform aerodynamic characterization, stores trajectory and separation analyses, and support wind tunnel, ground, and flight test events. Produce technical analysis and airworthiness artifacts, collaborate with multidisciplinary teams, and communicate findings to program leads and customers.

Lead systems engineering for defense hardware-software systems: capture and verify requirements in DOORS, develop system architectures, lead design reviews and CDRs, manage configuration and traceability, support integration and HIL/SIL testing, author CDR artifacts and test plans, mentor junior engineers, and drive transition to production.

Lead development and execution of system-level electrical verification for space vehicles, focusing on Telemetry, Tracking & Commanding and Command & Data Handling. Synthesize requirements into test solutions, develop automated test scripts, troubleshoot HW/SW issues, lead technical teams, maintain test processes, and support integration, shift work, and occasional travel in a classified environment.

Lead design and implementation of enterprise Java microservices and data-flow pipelines. Build Spring Boot backends (Java 21) with NiFi, S3 integration, MongoDB/Elasticsearch, and observability via Prometheus/Grafana. Create front-end dashboards (Angular/React/Vue) with real-time WebSocket/SSE updates, integrate messaging (JMS/ActiveMQ), and collaborate across teams while maintaining Top Secret/SCI eligibility.

Adapt mobile control station software to a cloud environment: build Infrastructure-as-Code, containerize applications (Docker/Kubernetes), implement microservices, instrumentation, integration, security, and system test. Collaborate with software, systems, cloud, and DevOps teams in an Agile environment to deploy solutions to an IL-5 cloud.

Adapt mobile control station applications to a DoD cloud environment. Design and build IaC, containerized deployments (Docker/Kubernetes), instrumentation, integration, security, and system test for an IL-5 cloud. Collaborate with software, systems, DevOps, and cloud teams in an Agile environment and lead technical efforts.

Design and implement enterprise software solutions across multiple mid-to-large projects. Build Java 21+/Spring Boot microservices, NiFi data flows, observability with Prometheus/Grafana, dashboards (backend + Angular/React/Vue frontends), real-time updates via WebSockets/SSE, and collaborate with cross-functional teams to resolve usability and integration issues.

Design, implement, verify, and optimize high-performance FPGA hardware for DSP and data-processing applications. Perform simulations, place-and-route, timing optimization, and lab/SIL integration. Integrate FPGA-SoC code, support system bring-up and testing, and apply commercial technologies (5G, ML) to military use cases.

Adapt a suite of mobile control station applications to a cloud environment by building Infrastructure-as-Code, containerization, instrumentation, integration, security, and system test. Collaborate with software, systems, DevOps, and cloud teams in an Agile environment to deploy solutions to an IL-5 cloud, support cloud adoption and migration, and lead technical efforts.

Perform aerodynamic characterization, stores trajectory and separation analyses, support wind tunnel, ground and flight tests, produce technical analyses and airworthiness artifacts, collaborate with multidisciplinary teams, and present findings to program leads and customers.

Design, model, and integrate optical components and lenses for survivability systems. Perform raytrace-based optical design, simulate infrared/visual signatures, build and test hardware in lab and flight, collaborate in IPTs, support requirements, and meet customer goals while maintaining required security clearances.

Design, develop, integrate, and test real-time physics-based simulations for operator-in-the-loop mission simulations. Model operational environments, perform trade studies, implement GUI/visualization tools, support EW effects, develop tactics/CONOPS, and demonstrate capabilities to leadership. Work on-site and support program development and R&D.

Lead design and optimization of low-observable aircraft features, perform electromagnetic signature modeling and simulation, direct RCS testing and validation, partner with materials and multidisciplinary teams to mature RAM and coatings, translate threats into survivability features, and support program assessments and milestone decisions.

Lead design and prototyping of generative AI experiences for autonomy development; drive UX for Hivemind products; perform user research, collaborate with CTO and product leads, and deliver reference implementations and integrations across full-stack web and edge systems.

Design, implement, and deploy safety-critical navigation and state estimation systems for aerospace platforms. Develop EKF and GNSS/INS integration, multi-sensor fusion for GPS-denied environments, FDIR and integrity monitoring, and V&V test plans. Support certification, requirements allocation, performance analysis, flight test evaluation, and provide technical leadership and mentoring.

The Principal Software Engineer will design automated ad serving systems, lead technical direction, collaborate with teams, and mentor engineers.

Lead secure architecture design and compliance in regulated cloud environments, manage STIGs and vulnerability remediation, and integrate security practices into DevOps.

As a Senior Principal Engineer, you'll define and drive the technical strategy for customer experience platforms, lead architectural decisions, and mentor engineering teams to enhance customer and agent experiences.

Perform hands-on test engineering and operations for alignments and ordnance: plan and execute tests, design and assemble mechanical/electromechanical fixtures, set up load control and data acquisition, troubleshoot hardware and instrumentation, analyze results, and support readiness reviews and test reporting across structural, instrumentation, and hazardous operations.

The Principal Turbomachinery Engineer will develop and analyze fuel and oxidizer turbopump assemblies for Aeon-R engines, leading projects and collaborating well across teams.

The Principal DevOps Engineer will lead the design and operation of CI/CD pipelines, platform reliability, and compliance for software deployment, while influencing DevOps practices and simplifying operational management across teams.

Design and build enterprise, mission-critical Java microservices and data-flow solutions. Lead multiple mid-to-large projects, integrate observability and dashboards, collaborate across teams, and support deployment and networking requirements while maintaining required security clearances.

The Principal Mechanical Design Engineer will develop tooling and automation solutions for manufacturing, collaborating with teams to enhance production for Terran vehicles and Aeon engines.

As a Principal Software Engineer, you'll architect and code backend services and ML models, integrate them with Salesforce, and mentor junior engineers.

Design, build, integrate, test, install and maintain rack-based communications hardware and cabling in lab and field environments. Produce drawings and BOMs, perform signal/power analysis, verify systems, troubleshoot complex issues, support site integration and provide stakeholder briefings. On-site role requiring travel and active security clearance.