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80 principal software engineer jobs at 36 companies in Lancaster, CA

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Sr. Principal Software Engineer
Woodland Hills, California, United States
$142k-$213k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
5+ YOERequires Top Secret clearance, STEM degree, 5+ years software experience (8+ for Sr. Principal), proficiency in C/C++/C#/Java, CI/CD and Git, experience with Windows/Linux and CI/CD pipelines.
C, C++, C#, Java, Java Server Pages (JSP), Windows Server, Linux, Docker, Kubernetes, Git, CI/CD, MLOps
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2mo
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Principal Engineer, Mission Software
Arvada or Los Angeles or San Francisco or Seattle or Washington
HybridFull Time
Quindar
Quindar: Cloud-native software for automated satellite mission operations.
8+ YOE3+ MgmtLead complex software and systems engineering in aerospace/defense; architecture focus; leadership; government programs; security clearance readiness.
Programming, Software Architecture, Distributed Systems, APIs, Operator tooling, Mission-critical applications
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3mo
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Principal Software Engineer
Hawthorne or El Segundo or Los Angeles
$200k-$400k/yr OnsiteFull Time
Freeform
Freeform: Deploys autonomous AI-powered metal 3D printing factories.
10+ YOE10+ years of hands-on experience building complex software systems (C/C++/Rust) in autonomy-focused environments.
C/C++, Rust, FPGAs, GPUs, edge computing, real-time control
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2mo
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Principal Software Engineer
San Diego or Valencia
$107k-$203k/yr HybridFull Time
Boston Scientific
Boston ScientificNYSE: BSX: Developer and manufacturer of innovative medical devices and therapies.
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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1w
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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
SnapNYSE: SNAP: Provides visual messaging software and augmented reality wearable devices.
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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2mo
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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: Developing and publishing competitive multiplayer video games.
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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1mo
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Principal Software Engineer
Los Angeles or United States
$143k-$190k/yr RemoteFull Time
GDIT
GDITNYSE: GD: Delivers IT and mission services to government agencies.
5+ YOEUS citizen able to obtain Public Trust 6C, 5+ years related experience, proven distributed systems and backend architecture skills, experience with microservices, cloud, observability, and mentoring engineers.
Java, Python, AWS, Azure, GCP, Kubernetes, ECS, Terraform, CloudFormation, Kafka, SQS, EventBridge, REST, GraphQL
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1w
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Principal Software Engineer (Autonomy)
Palmdale or Fort Worth
$160k-$200k/yr OnsiteFull Time
Lynx Software Technologies
Lynx Software Technologies: Provides secure, safety-certified software for aerospace and defense.
8+ YOEBachelor's in computer engineering/CS,8+ years embedded software experience,active Secret DoD clearance,proficiency in C/C++/Java/Python/Bash,ArduPilot/PX4,sUAS,Git,MAVLink,Linux/Windows;25% travel.
C, C++, Java, Python, Bash, ArduPilot, PX4, Git, MAVLink, Linux, Windows, Confluence, JIRA, Bitbucket, Docker, CI/CD
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1mo
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Principal Software Engineer - AI
Woodland Hills or Los Angeles or Alabama or Arizona or California or Colorado or Connecticut or Florida or Georgia or Illinois or Indiana or Kentucky or Massachusetts or Michigan or North Carolina or New Jersey or Nevada or New York or Ohio or Pennsylvania or South Carolina or Texas or Utah or Virginia
$200k-$230k/yr HybridFull Time
Convoso
Convoso: AI-powered contact center platform for outbound sales teams.
10+ YOE10+ years software engineering experience, 5+ years backend work in Python or PHP, expertise building LLM-based AI agent systems, production LLM API integration, MySQL proficiency, and automated testing for AI workflows.
LLM, OpenAI, Claude, GitHub Copilot, MySQL, Python, Django, Flask, PHP, Symfony, Laravel, React
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1mo
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Principal Software Engineer - Ad Experiences
Glendale or Santa Monica or Seattle or New York City or Los Angeles or San Francisco
$188k-$253k/yr HybridFull Time
The Walt Disney Company
The Walt Disney CompanyNYSE: DIS: Produces media content and operates global theme parks.
10+ YOE10+ years software engineering experience, BS/MS in CS/Engineering or equivalent, advanced Java proficiency, distributed systems design, SpringBoot, cloud (AWS), databases (DynamoDB, Redis), Kafka/Kinesis, observability, mentoring and on-call availability.
Java, SpringBoot, DynamoDB, Redis, MemCache, Apache Kafka, Kinesis, AWS, Terraform, Docker, Kubernetes
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1mo
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Principal Software Engineer - Ad Experiences
Glendale or Santa Monica or Seattle
$188k-$253k/yr HybridFull Time
The Walt Disney Company
The Walt Disney CompanyNYSE: DIS: Produces movies, operates theme parks, and provides streaming services.
10+ YOE10+ years software engineering experience; advanced Java proficiency; designing scalable, distributed systems; SpringBoot, non-relational DBs, messaging, and cloud experience; strong communication and mentoring skills.
Java, SpringBoot, DynamoDB, Redis, MemCache, Apache Kafka, Kinesis, AWS, Terraform, Docker, Kubernetes
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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
Palo Alto Networks
Palo Alto NetworksNASDAQ: PANW: Provides enterprise-grade network, cloud, and endpoint security software.
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 Embedded Software Engineer
Los Angeles, California, United States
$180k-$220k/yr HybridFull Time
Silvus Technologies
Silvus TechnologiesNYSE: MSI: Develops advanced mobile ad-hoc network radios for mission-critical communications.
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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2mo
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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: Manufacturer of interventional medical devices and technologies.
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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2mo
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Principal Platform Engineer
Los Angeles, California, United States
$170k-$190k/yr OnsiteFull Time
First Resonance
First Resonance: Software platform for tracking and managing complex hardware manufacturing.
8+ YOE8+ years software engineering; experience building high-availability backend services; strong distributed systems; leadership of large technical initiatives; excellent written and verbal communication.
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3w
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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
SnapNYSE: SNAP: Develops social media applications and augmented reality technology.
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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3w
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Principal Embedded Software Engineer
Los Angeles, California, United States
$180k-$220k/yr HybridFull Time
Motorola Solutions
Motorola SolutionsNYSE: MSI: Provides mission-critical communications and public safety technology.
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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3mo
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Staff Software Engineer - Fullstack
Los Angeles or Adrian
HybridFull Time
Observable Space
Observable Space: Developing integrated hardware and software for persistent space observation.
8+ YOE8+ years in software engineering; 2–3 years in staff/principal/lead roles; strong in Java/Kotlin/C++/C#; data modeling with RDBMS/ETL; TDD; experience in distributed systems and reactive frontend; ability to lead and influence engineering standards.
Java, Kotlin, C++, C#, TypeScript, React, SQL, ETL, Kotlin (backend), JVM
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1mo
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Principal Software Engineer I - Distributed Systems - Elasticsearch
United States or Seattle or Los Angeles or San Francisco or New York City
$133k-$211k/yr RemoteFull Time
Elastic
ElasticNYSE: ESTC: Software platform for search, security, and observability.
Expertise in distributed systems and consensus algorithms, strong Java/JDK skills, deep algorithms knowledge, experience building/debugging large distributed systems, and managing projects involving multiple engineers.
Java, JDK, Lucene, Netty, Elasticsearch
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1mo
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Principal Satellite Flight Software Engineer - TeraWave
Seattle or Los Angeles or Denver
$219k-$323k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
10+ YOEBachelor's in CS/SE/Aerospace, 10+ years developing embedded or mission-critical real-time software, strong C/C++ and Python skills, RTOS experience (Embedded Linux, VxWorks, QNX), CI/CD and secure development experience.
C, C++, Python, Embedded Linux, VxWorks, QNX, core Flight System (cFS), F Prime, TCP/IP, UDP, CAN, I2C, SPI, RS-422/485, software-in-the-loop (SIL), hardware-in-the-loop (HIL)
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