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84 principal engineer software development jobs at 25 companies in Lancaster, CA

3mo
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Principal Software Engineer - Mobile Development
Valencia or San Diego or San Jose
$107k-$203k/yr HybridFull Time
Boston Scientific
Boston ScientificNYSE: BSX: Global medical technology leader providing innovative solutions for patients.
8+ YOEBachelor's degree in CS/Software Engineering, 8+ years Android mobile development (≥2 years medical device apps), 3+ years AWS experience, expertise with Kotlin/Java/Android Jetpack, BLE and secure protocols, knowledge of medical device software standards.
Kotlin, Kotlin Multiplatform, Java, Android Jetpack, MVVM, Rx, XML data binding, Bluetooth Low Energy (BLE), AWS KMS, AWS S3, AWS DynamoDB, AWS Cognito, API Gateway, AWS EC2, AWS CloudWatch, Jenkins, Git, SonarQube, Atlassian Agile tools, TensorFlow, Pandas, NumPy, R, HTTPS, OAuth
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Principal Software Engineer
San Diego or Valencia
$107k-$203k/yr HybridFull Time
Boston Scientific
Boston ScientificNYSE: BSX: Global medical technology leader providing innovative solutions for patients.
8+ YOE8+ years Android app development; 2+ years in medical devices; Kotlin/Java; AWS; IEC 62304/ISO 13485/FDA design controls; strong cross-functional collaboration.
Kotlin, Kotlin Multiplatform, Java, Android Jetpack, BLE, AWS, OAuth, Git, Jenkins, SonarQube, Atlassian Agile tools, API Gateway, Cognito, DynamoDB, S3, EC2, KMS, REST
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Principal / Sr. Principal Software Engineer
Woodland Hills, California, United States
$114k-$213k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Global aerospace and defense technology.
5+ YOEU.S. citizen with active US Government Secret clearance; STEM degree plus 5+ years (principal) or 8+ years (sr principal) experience; C/C++ (modern C++ 17+) development, CI/CD, Git, and system design experience; willingness to work onsite.
C, C++, C++ 17, C++ 20, Git, CI/CD, Docker, Kubernetes, Linux, CUDA, MLOps, DevSecOps, Model-based Engineering, Agile, Scrum
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1mo
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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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1w
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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 Development Engineer in Test
New York or Glendale
$172k-$241k/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+ YOE10+ years in quality engineering or software development; leadership; experience scaling test automation.
Python, OO languages, Test automation, Cloud-native testing
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3w
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Principal Software Engineer
Woodland Hills, California, United States
$114k-$171k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Global aerospace and defense technology.
5+ YOEBachelor's in STEM with 5+ years, master's with 3+ years, or PhD with 1+ year; active Top Secret clearance; software experience in C, C++, C#, Java, JSP, web development, CI/CD, Linux, and Windows Server.
C, C++, C#, Java, Java Server Pages (JSP), DevSecOps, Agile, Windows Server, Linux, CI/CD, Git, Docker, Kubernetes, Scrum, MLOps
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21h
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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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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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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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22h
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Principal Embedded Software Engineer
Los Angeles or Altadena
$231k-$323k/yr OnsiteFull Time
Honeybee Robotics
Honeybee Robotics: Private aerospace engineering designing and manufacturing robotic systems for space exploration, defense, and industrial customers.
10+ YOEBachelor's degree in a relevant engineering or computer science field and 10+ years developing embedded software. Requires C/C++, embedded platforms, avionics, testing, sensors, Git, communication protocols, and safety-critical systems experience.
C, C++, Git, Ethernet, USB, CAN, SPI, I2C, Python, RTOS
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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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1mo
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Principal Software Engineer, Gameplay - Teamfight Tactics
Los Angeles, California, United States
$229k-$320k/yr OnsiteFull Time
Riot Games
Riot Games: Developer and publisher of video games and esports.
10+ YOE10+ years software development; 4+ years Unreal Engine; expert C++ and gameplay engineering; BS in Computer Science or equivalent fundamentals; collaboration, mentoring, and multi-platform experience.
Unreal Engine, C++, Android, iOS
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3mo
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Principal Engineer Software - Storage (Chronosphere)
Burbank or Denver or Chicago or Austin or Jacksonville or Hartford or Bridgeport or Seattle or Boston or New York City
$147k-$238k/yr RemoteAll Commitments Available
Chronosphere
ChronosphereNASDAQ: PANW: Global cybersecurity platform providing network, cloud, and AI-driven security solutions.
Design and build scalable backend services for high-volume telemetry data; strong backend skills; cloud infra experience; API design; mentorship.
Go, Java, Python, Rust, AWS, GCP, Azure, REST, gRPC, GraphQL
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1mo
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Principal Software Engineer, Machine Learning Infrastructure
Palo Alto or Seattle or Los Angeles or New York or Bellevue
$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, distributed systems and ML inference platform expertise, strong software design and debugging skills, ability to operate highly-available systems at scale.
Tensorflow, PyTorch, Kubernetes, GPU, LLM inference, RPC
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2mo
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Principal Embedded Software Engineer
Los Angeles, California, United States
$180k-$220k/yr HybridFull Time
Silvus Technologies
Silvus Technologies: U.S. tactical communications manufacturer developing MANET radios and mesh-network systems for military, public-safety, and enterprise users.
8+ YOEBachelor's in EE/CS or related, 8+ years embedded software development experience, expertise with embedded Linux on ARM, C programming and Linux kernel driver development. U.S. citizenship required; background check and drug test contingent.
Linux, Linux kernel, C, ARM, RISC-V, AMD UltraScale+ MPSoC, Microchip Polarfire SoC, IPsec, NIST FIPS 140-3, NIAP Common Criteria
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1d
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Principal Software Engineer - Search Algorithms - Elasticsearch
United States or Seattle or Los Angeles or California or New York City
$160k-$253k/yr RemoteFull Time
Elastic
ElasticNYSE: ESTC: Search AI platform for search, observability, and security.
Professional experience with vector similarity, vector databases, and algorithms such as HNSW or IVF; strong Java skills; autonomous project leadership; collaborative development; and data storage technology experience.
Elasticsearch, Lucene, Java, HNSW, IVF, Solr, PostgreSQL, MongoDB, Cassandra, GitHub, Zoom, Slack
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1mo
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Principal Embedded Software Engineer
Los Angeles, California, United States
$180k-$220k/yr HybridFull Time
Silvus Technologies
Silvus Technologies: U.S. tactical communications manufacturer developing MANET radios and mesh-network systems for military, public-safety, and enterprise users.
8+ YOEBachelor's in EE/CS,8+ years embedded Linux firmware experience on ARM,RISC-V; expertise in C and Linux kernel driver development; experience with networking, security and device drivers; U.S. citizenship required.
ARM, UltraScale+, RISC-V, Linux, C, Linux kernel, Microchip PolarFire SoC, AMD UltraScale+ MPSoC, IPsec
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2d
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Principal Dynamics Engineer
Los Angeles, California, United States
$190k-$235k/yr OnsiteFull Time
K2 Space
K2 Space: Building high-power, mass-produced satellite platforms.
8+ YOEBachelor’s degree in mechanical engineering, aerospace engineering, physics, or mathematics and 8+ years of dynamics experience. Requires expertise in testing, finite element analysis, software development, and spacecraft dynamics.
Nastran, Python, FEMAP, Statistical Energy Analysis (SEA), Wave6, Boundary Element Method (BEM), LS-DYNA, NASA 7004C, GNC, HALT/HASS, Craig-Bampton
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3d
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Principal AI Engineer (Remote)
United States or California or Los Angeles or Hawaii
$282k-$371k/yr RemoteFull Time
Rula
Rula: Behavioral health platform connecting U.S. patients with licensed therapists and psychiatric providers.
10+ YOE10+ years software engineering, 7+ years distributed systems, 5+ years production ML and search or recommendation engines, Python plus a backend language, foundation-model products, vector databases, and MLOps.
Python, TypeScript, Java, Go, OpenAI, Anthropic, Gemini, RAG, Elasticsearch, OpenSearch, Pinecone, Weaviate, FAISS, Milvus, Learning-to-Rank, NLP, LLMs, MLOps, NDCG, MAP, A/B testing, HIPAA, GDPR
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