Top Principal Engineer Jobs in Los Angeles, CA

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.

Build, operate, and secure cloud-native and edge infrastructure including Kubernetes, artifact pipelines, application streaming, and air-gapped appliances. Partner with product, GRC, and mission owners to design, deploy, and harden systems, remediate vulnerabilities, support audits (IL5/IL6/JWICS), and ensure trusted artifact delivery across environments.

Lead design and implementation of core game engine systems, optimize memory and performance, research improvements, collaborate with cross-disciplinary teams, mentor engineers, and support feature rollout across platforms for a high-profile shipped title.

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

Lead multi-year technical vision and architecture for Payments, Scheduling, Forms, RCM and mobile platforms. Drive cross-team solutions, evaluate build-vs-buy, mentor senior engineers, set company-wide engineering standards, and ensure scalability, reliability, and observability for high-throughput distributed systems.

Select and qualify electrical, electronic, electro-mechanical, and electro-optical components for aerospace and defense programs. Develop component specifications and source control documents, manage BOMs and component data in PLM systems, support procurement and suppliers, perform BOM and derating analyses, resolve manufacturing and qualification issues, and manage component risks including obsolescence, lifecycle constraints, and industry alerts.

Performs systems safety engineering for defense systems, applying MIL-STD-882 and software safety standards. Develops hazard analyses, fault trees, safety assessments, requirements, and safety artifacts; identifies and mitigates hazards; supports DO-178/DO-254 certification; tracks hazards and communicates program status. The role is fully onsite in Woodland Hills, California, contingent on program award, and requires U.S. citizenship plus eligibility for a Secret clearance.

Develop and maintain physics-based models and simulations for inertial navigation systems. Perform Monte Carlo, sensitivity, trade-off, and sensor-data analyses; validate models using laboratory, flight, and field data; support requirements, error budgets, testing, and HIL/SIL integration. Investigate anomalies, recommend design and calibration improvements, document technical findings, mentor junior engineers, and improve modeling processes. The role requires onsite work in Woodland Hills, U.S. citizenship, and an active Secret clearance.

Supports integrated logistics and product support engineering across the system lifecycle, from proposal and development through production and sustainment. Performs logistics supportability analysis, Level of Repair Analysis, life-cycle cost analysis, maintenance planning, provisioning, and technical data development. Collaborates with integrated product teams and customers, supports mission readiness, and improves logistics processes. The role is full-time onsite in Woodland Hills, California, requires U.S. citizenship, and involves 10% travel.

Design and integrate advanced air vehicle concepts using parametric CAD models, configuration studies, and multidisciplinary optimization. Support conceptual sizing, air vehicle integration, surface design, and trade studies across design stages from concept through manufacturing and flight test. Collaborate with aerodynamics, propulsion, structures, CFD, performance, and mass properties teams. The role may be filled at the Aeronautical Engineer or Principal Aeronautical Engineer level.

Principal Frontend Engineer responsible for architecting and maintaining a high-performance, real-time trading web application using React, Next.js, TypeScript, and Jotai. The role owns frontend features, optimizes mobile performance, manages real-time data and WebSockets, ensures code quality, and partners with founders and leadership on technology, product, and feature decisions. Experience building interactive trading platforms, particularly in DeFi, is required.

Lead reliability strategy and programs to minimize equipment failures, extend asset life, and reduce maintenance costs. Drive root cause analyses, develop KPIs and statistical models, implement predictive maintenance and condition monitoring, standardize maintenance practices, evaluate reliability technologies, interface with vendors, and lead internal reliability audits to ensure safety, compliance, and operational resilience.

Leads the architectural vision and hands-on development of Ford Pro Intelligence’s large-scale SaaS platforms, APIs, data pipelines, and web applications for fleet telematics. The role provides technical leadership across teams, mentors engineers, translates business needs into scalable designs, scopes enterprise initiatives, improves engineering standards, and serves as the technical escalation point for critical incidents. Key technologies include Kotlin, Spring Boot, React, PostgreSQL, Redis, and GCP services.

Lead photolithography process engineering and team for wafer fabrication. Responsibilities include optimizing processes, troubleshooting, and collaborating on tech development.

The Engineering Director will lead and manage the cloud infrastructure and developer enablement, focusing on AI-native systems, team development, and security operations.

As a Senior+ Engineer, you will lead the design and architecture of impactful open-source projects while mentoring teams, coding, and engaging with the community.

The Client Engine Software Engineer will design and implement complex client-side engines using advanced algorithms, focusing on high-performance and fault-tolerance in a remote team environment.

The Principal Engineer for Customer Quality acts as the key customer contact for quality issues, addressing complaints, and driving continuous improvement. This role requires collaboration with multiple teams to establish quality standards and facilitate customer audits, while managing quality performance and supporting product lifecycle decisions.

Develops industrial engineering plans for labor, facilities, equipment, tooling, capacity, and production scheduling. Analyzes costs, inventory, operational processes, and manufacturing performance; creates metrics and data visualizations; conducts time studies and process simulations; and supports multiple product lines and programs. The role also aligns SAP/MRP systems, performs shop-loading and staffing analysis, and collaborates with facility engineering and cross-functional manufacturing teams.

Design, implement, verify, and optimize FPGA-based digital hardware for DSP and data-processing applications. Perform simulations, place-and-route, timing optimization, lab and SIL integration, FPGA-SoC integration, and system bring-up for military/defense applications leveraging 5G and machine-learning technologies.

Serve as a field survivability engineer: coordinate with designers, develop and integrate low-detectability technologies, plan and execute RCS/RF tests, analyze test data, recommend material/design changes, and coordinate supplier implementation and testing. Role requires significant travel and high-level security clearance.

Build Quince’s greenfield, AI-native supply chain planning platform from architecture through production. Own forecasting and optimization model pipelines, experimentation, deployment, monitoring, operator tooling, integrations, and AI-augmented workflows. Partner with scientists, planners, business leaders, and distributed engineering teams to translate supply chain needs into scalable systems. Set technical direction, establish engineering standards, and recruit and develop a high-performing team.

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

Leads full-stack guidance, navigation, and control development for a space vehicle, including attitude and orbit control, trajectory planning, six-degree-of-freedom simulation, Monte Carlo analysis, flight software, avionics-in-the-loop testing, sensor and actuator selection, constellation design, and real-time spacecraft operations support.