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83 sr principal software engineer jobs at 30 companies in Lancaster, CA

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Principal / Sr. Principal Software Engineer
Woodland Hills, California, United States
$114k-$213k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
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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3w
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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: Develops and manufactures advanced aerospace, defense, and space systems.
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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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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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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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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Principal Software Engineer - Observability
New York City or Glendale
$193k-$259k/yr HybridFull Time
The Walt Disney Company
The Walt Disney CompanyNYSE: DIS: Produces media content and operates global theme parks.
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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Principal Software Engineer - Observability
New York City or Glendale
$193k-$259k/yr HybridFull Time
The Walt Disney Company
The Walt Disney CompanyNYSE: DIS: Produces movies, operates theme parks, and provides streaming services.
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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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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4d
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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 degree in computer engineering, computer science, or related field; 8+ years of software development experience; C, C++, Java, Python, Bash, Git, Linux, Windows, embedded systems, and active Secret clearance required.
C, C++, Java, Python, Bash, Git, Linux, Windows, Atlassian Tools, Confluence, JIRA, Bitbucket, ArduPilot, PX4, MAVLink, Docker, CI/CD
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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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Principal Software Engineer, Gameplay - Teamfight Tactics
Los Angeles, California, United States
$229k-$320k/yr OnsiteFull Time
Riot Games
Riot Games: Develops and publishes video games and esports content.
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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2mo
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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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3mo
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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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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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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
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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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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2w
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Principal Software Engineer, Back End
Los Angeles or Nashville or New York City or Portland or United States
$180k-$205k/yr RemoteFull Time
CD Baby
CD BabyEuronext Amsterdam: UMG: Distributes music and manages royalties for independent artists.
10+ YOE10+ years back-end engineering experience with leadership in decomposing monoliths; deep .NET/C# and SQL Server expertise; cloud (Azure preferred) and container experience; experience with ORMs, API design, and data pipelines.
.NET, C#, SQL Server, Azure, AWS, GCP, Go, Node.js, Python, Postgres, Entity Framework, Dapper, Snowflake, BigQuery, Redshift, REST, GraphQL, gRPC, CI/CD
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2mo
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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 Engineer, CoCounsel
Eagan or Frisco or New York City or Toronto or Ann Arbor or San Francisco or Los Angeles or Irvine or McLean or Washington
$159k-$295k/yr HybridFull Time
Thomson Reuters
Thomson ReutersNASDAQ: TRI: Provides professional software, data, and news services globally.
Bachelor's degree (or equivalent) in CS or CE, deep Python and distributed systems experience, hands-on AI/LLM and agent experience, FastAPI/PostgreSQL/AWS familiarity, identity/IAM (SAML, OIDC, OAuth 2.0) expertise, strong communication.
Python, FastAPI, PostgreSQL, AWS, SSO, SAML, OIDC, OAuth 2.0, RBAC, ABAC, Anthropic, OpenAI, LLMs, MCP servers, vector databases, embeddings, semantic search
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Principal, Software Engineering (Adobe - Integrations & Automations)
Atlanta or Boston or Chicago or Denver or Los Angeles or New York or Salt Lake City or San Diego or Canada
$136k-$168k/yr RemoteFull Time
DEPT
DEPT: Global digital agency providing integrated technology and marketing services.
6+ YOE6+ years backend/software integration experience; expertise with REST, GraphQL, serverless, webhooks, OAuth; Adobe Workfront, Workfront Fusion, App Builder, Commerce API Mesh, and AEM experience; strong troubleshooting and consultative skills.
REST, GraphQL, OAuth, Adobe Workfront, Adobe Workfront Fusion, Adobe App Builder, Adobe Commerce API Mesh, AEM Assets, Metaview
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