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191 sr principal software engineer jobs at 66 companies in Chino Hills, CA

1mo
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Principal / Sr Principal Engineer Software
San Diego or El Segundo
$114k-$171k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Global aerospace and defense technology.
5+ YOERequires Top Secret clearance eligibility, 5+ years engineering experience (principal) or 8+ (sr principal), proficiency with Java 21+, Spring Boot, Apache NiFi, microservices, observability tools, and experience in enterprise integration and data flow technologies.
Spring Integration, Apache Camel, Java 21+, Prometheus, Grafana, Apache NiFi, AWS SDK for Java v2, Spring Boot, MongoDB, Elasticsearch, Angular, React, Vue.js, Spring WebSocket, WebSockets, SSE, Protobuf, JAXB, Jackson, JSON, JMS, ActiveMQ Classic, Resilience4j, Docker, Testcontainers, LocalStack, Project Reactor, Spring Boot Actuator, Micrometer, Avro
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1mo
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Principal / Sr. Principal Engineer Software Quality
Woodland Hills, California, United States
$104k-$194k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Global aerospace and defense technology.
5+ YOETop-Secret clearance and U.S. citizenship required. Bachelor’s in engineering/STEM (or Master’s), 5+ years software development/integration experience (8+ for Sr.), experience with Agile/Waterfall, scripting (Bash, Python), Linux, Git, EMR metrics collection and QMS familiarity.
Bash, Python, Linux, Git, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, GitLab, Windows 11, ISO 9001, AS9100
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3mo
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Sr. Principal Systems Engineer
Irvine, California, United States
$125k-$206k/yr OnsiteFull Time
BD
BDNYSE: BDX: Global medical technology advancing the world of health.
4+ YOEBachelor’s or higher in engineering with 4+ years; medical device experience; system requirements, verification/validation, and design controls; IEC 60601-1 knowledge; project leadership preferred.
Electrical Engineering, Mechanical Engineering, Biomedical Engineering, Software, IEC 60601-1, PTC, Polarion, JAMA, DOORS
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Principal Software Engineer
Huntington Beach or San Francisco
$220k-$265k/yr OnsiteFull Time
Mach Industries
Mach Industries: Private defense manufacturer developing unmanned aerospace systems and production infrastructure for military customers.
10+ YOE10+ years leading large-scale software projects; expert in C++, Rust, Python or C; real-time/embedded systems experience.
C++, Rust, Python, C, RTOS, embedded systems
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4mo
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Principal Software Engineer, Continuous Integration (Starship)
Hawthorne, California, United States
$200k-$285k/yr OnsiteFull Time
SpaceX
SpaceXNasdaq: SPCX: Designing, manufacturing, and launching advanced rockets and spacecraft.
7+ YOE7+ years software engineering; Bachelor's degree in CS/Engineering/Math or STEM, or 9+ years experience in lieu of degree; strong Python/C++/Go/Rust; Bazel or similar build systems; work on on-premises compute; willingness for long hours.
Bazel, Python, C++, Rust, Go
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2w
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Principal Software Engineer
Irvine, California, United States
$118k-$218k/yr OnsiteFull Time
Cadence Design Systems
Cadence Design SystemsNASDAQ: CDNS: Computational software provider for electronic design and system development.
PhD in a related engineering field plus expertise in nonlinear mechanics, finite element analysis, numerical methods, and software development using Fortran, C/C++, Python, Linux shell scripting, and commercial FEA software.
MSC Nastran, Marc, Microsoft Word, Microsoft Excel, Fortran, C, C++, Python, Linux
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3mo
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Principal Embedded Software Engineer
El Segundo, California, United States
$201k-$314k/yr OnsiteFull Time
Radiant
Radiant: Nuclear-energy startup developing portable, mass-produced microreactors for defense, remote industry, and critical infrastructure.
8+ YOELead embedded software architecture for I&C systems; 8+ years; onsite in El Segundo; RTOS experience; C/C++.
Zephyr RTOS, NuttX, ThreadX, Embedded C, C++, CMake, Simulink Autocode C++ export
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Principal Software Engineer
Santa Monica or Los Angeles or New York City or Bellevue or Seattle or San Francisco or Palo Alto
$235k-$414k/yr OnsiteFull Time
Snap Inc.
Snap Inc.NYSE: SNAP: Technology focused on augmented reality and communication.
10+ YOE10+ years software development experience, technical leadership experience, BS in a technical field (or equivalent), experience architecting distributed systems, strong software design and debugging skills, proficiency using AI tools and modern engineering workflows.
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Principal Software Engineer
Plano or Boston or Portsmouth or Indianapolis or Columbus or United States or Los Angeles or Philadelphia or San Francisco
$137k-$257k/yr HybridFull Time
Liberty Mutual
Liberty Mutual: Diversified global insurer providing property, casualty, and life coverage.
8+ YOERequires 8+ years of software engineering experience, enterprise architecture and technical leadership, distributed systems expertise, cloud-native development, and proficiency with JavaScript/TypeScript, React, Node.js, and related tools.
JavaScript, TypeScript, React, Node.js, Next.js, Java, HTML/CSS, Micro Frontends, AWS, CDK, GitHub Actions, OAuth 2.0, OpenID Connect, OWASP Top 10, Playwright, JMeter, Datadog, Splunk, Bridgeway, MFE, CI/CD, DevOps, SecOps, Generative AI
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Principal Software Engineer
Canada or El Segundo
RemoteFull Time
NEOGOV
NEOGOV: Public-sector SaaS provider of human-capital and compliance software for government, public-safety, and education organizations.
10+ YOE10+ years software engineering experience, staff-level technical leadership, proficiency with .NET, SQL/SQL Server, and Angular; experience with CI/CD, TDD, observability, and Git; Bachelor's or equivalent.
SQL, SQL Server, .NET, Angular, Git, SonarQube, Mend, CI/CD, TDD
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3mo
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Principal Software Engineer, AI Enablement - Central Product
Los Angeles, California, United States
$229k-$320k/yr OnsiteFull Time
Riot Games
Riot Games: Developer and publisher of video games and esports.
8+ YOEBS in Computer Science (or equivalent) with 8-12 years of software engineering; strong systems integration and technical leadership; expert in C++ and another language (Python or C#); experience with AAA games or large-scale live services; AI tooling experience.
C++, Python, C#, Unreal Engine, ML frameworks (e.g., PyTorch, TensorFlow), AI tools and APIs
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Principal, Software Engineer
Lake Forest, California, United States
$128k-$166k/yr OnsiteFull Time
Alcon
AlconNYSE / SIX Swiss Exchange: ALC: Global leader in eye care.
5+ YOE5+ years relevant experience, Bachelor’s degree or equivalent, fluent English, C++/C# development, RTOS and Windows experience, familiarity with medical device software lifecycle and regulations.
C++, C#, MATLAB, LabVIEW, Microsoft Word, Microsoft Excel, Microsoft Visio, Microsoft Visual Studio, AWS DevOps, Jira, Git, ADO, GitHub, TFS
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2w
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Principal Software Engineer
Costa Mesa, California, United States
$165k-$283k/yr RemoteFull Time
Siemens
SiemensXetra: SIE: Global technology specializing in industry, infrastructure, transport, and healthcare.
10+ YOE10+ years of software development experience; distributed systems and real-time applications expertise; technical strategy and architecture leadership; backend language proficiency; system design, optimization, and fault-tolerance skills.
Python, Go, TypeScript, PyTorch, Hugging Face, ONNX Runtime, LangChain, AWS, Kubernetes, Redis, PostgreSQL, Amazon S3, Terraform, GitHub Actions, Datadog, Grafana, Prometheus
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4d
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Principal Software Engineer
Torrance or Orangeville
$195k-$270k/yr OnsiteFull Time
Valar Atomics
Valar Atomics: Private developer of small modular nuclear reactors and fuel-production facilities for industrial power and clean fuels.
10+ YOE10+ years of software experience, platform architecture ownership, high-volume telemetry and streaming systems, simulation platforms, cloud/container deployment, AI coding tools, and a relevant bachelor's degree or equivalent experience.
Kafka, Pulsar, Kinesis, Flink, Java, C#, Go, C++, Rust, Python, JavaScript, Claude Code, Cursor, Copilot, OPC UA, MQTT, Modbus, Git, Docker, Kubernetes, LLMs, REST, GraphQL, PLM, ERP, MES, LIMS, NQA-1, GAMP 5, 21 CFR Part 11, CI/CD
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1w
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Principal, Software Engineer
New York or California or Illinois or Atlanta or Boston or Chicago or Denver or Los Angeles or New York or Salt Lake City or San Diego
$122k-$165k/yr RemoteFull Time
DEPT
DEPT: A global digital agency bridging marketing and technology.
7+ YOERequires 7+ years software experience, 3+ years Python, expert backend and distributed systems knowledge, cloud and Docker experience, API integration, databases, frontend architecture, CI/CD, and technical leadership.
Python, Gemini CLI, Claude Code, Codex, Angular, TypeScript, Google Cloud, AWS, Azure, Docker, Git, Mercurial, Agile, CI/CD, Google's Agent Development Kit (ADK), SQL, NoSQL, LLM
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6d
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Principal Software Engineer
El Segundo, California, United States
$150k-$190k/yr HybridFull Time
KBR
KBRNYSE: KBR: Provider of science, technology, and engineering solutions.
10+ YOEBachelor's degree and 10+ years of software development experience. Requires distributed systems, full-stack, Angular, backend APIs, Kafka, event-driven architecture, Agile, DevSecOps, CI/CD, and ability to obtain a DoD Secret clearance.
Angular, Kafka, Kubernetes, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Kafka Streams, Apache Flink, RabbitMQ, NATS, OpenTelemetry, Prometheus, Grafana, ELK, CI/CD
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2w
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Principal Software Engineer - Observability
New York City or Glendale
$193k-$259k/yr HybridFull Time
Disney Entertainment
Disney EntertainmentNYSE: DIS: Entertainment is a media division producing and distributing film, television, streaming, and games for global audiences.
10+ YOEBachelor’s degree or equivalent experience; 10+ years of software engineering; AI/ML, scalable APIs, cloud platforms, observability, agentic workflows, CI/CD, microservices, and technical leadership experience.
FastAPI, Flask, Anthropic, OpenAI, Google, Meta, Claude, Qwen, LangChain, LangGraph, AWS, Microsoft Azure, GCP, Cursor, Claude Code, GitHub, Docker, AWS/EKS, Datadog, Grafana, Conviva, OpenTelemetry (OTel), AWS Bedrock, PySpark, Pandas, Databricks, Snowflake, GPT
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2w
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Principal Software Engineer - Observability
New York City or Glendale
$193k-$259k/yr HybridFull Time
Disney Entertainment
Disney EntertainmentNYSE: DIS: Entertainment is a media division producing and distributing film, television, streaming, and games for global audiences.
10+ YOEBachelor’s degree or equivalent experience; 10+ years of software engineering experience; AI/ML, observability, scalable APIs, cloud platforms, agentic workflows, and front-end/back-end systems expertise.
FastAPI, Flask, Anthropic, OpenAI, Google, Meta, Claude, Qwen, LangChain, LangGraph, AWS, Microsoft Azure, Google Cloud Platform, Cursor, Claude Code, GitHub, Docker, AWS/EKS, Datadog, Grafana, Conviva, OpenTelemetry (OTel), AWS Bedrock, PySpark, Pandas, Databricks, Snowflake, GPT
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2mo
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Principal Software Engineer (Python)
Irvine or Oklahoma City or Sunrise or Oxford or Dallas or Austin
$155k-$180k/yr HybridFull Time
Cotality
Cotality: U.S.-based private property data, analytics, and workflow solutions provider serving real estate, lending, insurance, and government professionals.
10+ YOE10+ years professional software engineering experience; expert Python/FastAPI; semantic, graph, and RAG/Vector retrieval experience; cloud (GCP/AWS/Azure); leadership, TDD, and AI/LLM/SLM familiarity.
Git, Unix, Python, FastAPI, FastMCP, ADK, LLM, SLM, GraphRAG, Vector Databases, RAGAS, DeepEval, GCP, AWS, Azure
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2d
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Principal Software Engineer (Autonomy)
Fort Worth or Palmdale or Atlanta or Denver or Huntsville
$160k-$200k/yr OnsiteFull Time
Thompson Software Solutions
Thompson Software Solutions: Private aerospace and defense software engineering consultancy developing safety-critical avionics, mission, cybersecurity, and open-architecture systems.
8+ YOEBachelor's degree in computer engineering, computer science, or related field; 8+ years of software development with embedded systems; C, C++, Java, Python, Bash, Git, Linux, and Windows; Secret clearance eligibility.
C, C++, Java, Python, Bash, ArduPilot, PX4, Git, Linux, Windows, Atlassian Tools, Confluence, JIRA, Bitbucket, MAVLink, Docker, CI/CD, Electronic Medical Records (EMR)
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