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67 principal software engineer jobs at 23 companies in Santee, CA

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Software Engineer / Principal Software Engineer
Palmdale or San Diego or El Segundo
$92k-$171k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
2+ YOESTEM degree with 2+ years (software) or 5+ for principal, experience with coding languages, ability to obtain US Secret clearance/SAP, and willingness to travel up to 25%.
Blazor, .Net, C#, Azure DevOps, Selenium, Oracle, SQL Server, Transact SQL, Git, HTML5, Javascript, AIGit
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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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3w
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Principal Software Engineer
San Diego, California, United States
$190k-$210k/yr OnsiteFull Time
Mainstay Medical
Mainstay Medical: Restorative neurostimulation therapy for mechanical chronic low back pain.
15+ YOE15+ years software engineering experience with 8+ years in regulated medical devices, familiarity with IEC 62304 and FDA PMA processes, proficiency in .NET/C#/Blazor/.NET MAUI, Azure, embedded firmware, and strong cybersecurity and leadership skills.
.NET, C#, Blazor, .NET MAUI, EF Core, SQLite, Azure DevOps, Git, Figma, Claude Code, Azure, Bluetooth, gRPC
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2mo
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Senior Principal Software Engineer
Hudson or New Hampshire or Austin or San Diego or Texas or California or United States
$133k-$226k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Provides advanced defense, aerospace, and security technology solutions.
8+ YOEActive DoD Secret clearance and U.S. citizenship, Bachelor’s in CS/CE (or related) with 8+ years experience, embedded/application C++ development, Linux, software engineering processes, testing, and technical leadership.
C++, Linux, Git, Jira, Confluence, ClearCase, Bitbucket, Continuous Integration Tools
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1mo
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Principal Engineer, Software (R5285)
United States or San Diego or San Francisco or Dallas or Washington
$220k-$330k/yr RemoteFull Time
Shield AI
Shield AI: Develops autonomous flight software and unmanned aircraft for defense.
15+ YOE15+ years building large production software; strong in TypeScript/C++/Go/Python/Rust; 5+ years React/Node/TypeScript and web applications; experience with Git, Linux, Docker, CI/CD, cloud (Azure/GCP/AWS); client-side LLM context management; strong UX/design and research skills.
TypeScript, C++, Go, Python, Rust, Git, React, Node, JavaScript, Linux, Docker, CI/CD, Azure, GCP, AWS, WebGL, Playwright, Electron, DOM, WebSocket, SSE, HTTP Streaming, LLM
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2mo
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Debt Solutions - Principal Software Engineer (React/C#/AWS)
San Diego, California, United States
$211k-$297k/yr HybridFull Time
CoStar Group
CoStar GroupNASDAQ: CSGP: Global provider of commercial and residential real estate data.
10+ YOEBachelor's degree required; 10+ years building complex enterprise web applications; expertise in microservices, security, AWS, C#/Java/Python/JavaScript/TypeScript, databases, and event-driven architectures.
React, C#, Java, Python, JavaScript/TypeScript, GraphQL, Amazon Web Services (AWS), Lambda, DynamoDB, CloudWatch, CloudFormation, SNS, SQS, S3, API Gateway, Terraform, Kibana, Git, Azure DevOps, OpenID
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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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2w
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Principal Software Developer - Full Stack (Unity, C#)
Austin or San Mateo or Carlsbad or Chicago or Eugene or Toronto
$114k-$180k/yr OnsiteFull Time
Zynga
Zynga: Develops and publishes social and mobile video games globally.
6+ YOEB.Sc. or equivalent, 6+ years game/mobile software experience, expert C#, 3+ years Unity, shipped mobile titles, experience with performance profiling, AWS, Kubernetes, Datadog, and git.
Unity, C#, AWS, Kubernetes, Datadog, git, Claude Code
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3mo
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Principal Mobile Engineer
Carlsbad, California, United States
$160k-$180k/yr OnsiteFull Time
Nice North America
Nice North America: Manufacturer of smart home and building automation systems.
8+ YOE8+ years in mobile app development (iOS/Android) with React Native, quality code, and cross-region collaboration.
React Native, iOS, Android, AWS, Jira, Confluence, Bitbucket, Figma, Sentry, CI/CD
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Principal Machine Learning Engineer
San Diego, California, United States
$216k-$378k/yr OnsiteFull Time
ServiceNow
ServiceNowNYSE: NOW: Provides a cloud platform for automating enterprise digital workflows.
15+ YOE15+ years software engineering,5+ years at principal/staff/director scope;deep expertise in agentic AI,LLM systems,multi-agent orchestration,RAG,LLMOps/MLOps,AI observability,governance;enterprise cloud architecture and leadership.
ServiceNow, MCP, A2A, ITSM, CMDB, GRC, DevOps, CI/CD, LLM, RAG
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2w
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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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1mo
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Principal DevSecOps Engineer
San Diego, California, United States
$155k-$200k/yr OnsiteFull Time
Fuse Integration
Fuse Integration: Developing tactical communication and networking systems for defense.
12+ YOE3+ MgmtB.S. in engineering, 12+ years DevSecOps/software engineering experience with 3+ years technical leadership; expertise in C++, Python, Bash, Kubernetes, Linux, STIG compliance, GitLab CI, Ansible, and cloud (AWS/Azure). US citizenship required.
C++, Python, Bash, Kubernetes, SELinux, SBOM, GitLab CI, Ansible, Podman, Docker, RPM, Jira, GitLab, vCenter, vSphere, ESXi, GNS3, AWS, Azure, govcloud, Kickstart, Subiquity, SAST, DAST, SCA
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1mo
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Principal Automation Engineer
San Diego, California, United States
$238k-$262k/yr OnsiteFull Time
Firestorm Labs
Firestorm Labs: Develops and manufactures low-cost 3D-printed unmanned aerial vehicles.
15+ YOEBachelor's in engineering or equivalent experience, 15+ years in UAS/robotics/autonomy/software, U.S. citizenship with ability to obtain DoD clearance, hands-on with PX4/ArduPilot/MAVLink, strong Python and C/C++ skills, SIL/HIL experience.
PX4, ArduPilot, MAVLink, Python, C, C++, SIL, HIL, Microsoft Excel, Microsoft Word, Microsoft Outlook, Microsoft PowerPoint
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2w
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Principal Systems Engineer (Console System)
Carlsbad or Arden Hills or Maple Grove
$107k-$203k/yr OnsiteFull Time
Boston Scientific
Boston ScientificNYSE: BSX: Developing and manufacturing innovative medical devices for less-invasive treatments.
7+ YOEBachelor's in engineering,7+ years engineering experience,5+ years technical leadership,systems engineering across hardware/software,experience with Class II/III medical devices,requirements and verification expertise.
Jama, DOORS, Requisite Pro, Jira, MATLAB, Python, LabVIEW, Minitab
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1mo
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Sr. Staff/Principal Engineer — GPU Driver & Systems Software
San Diego or San Jose
$179k-$286k/yr OnsiteFull Time
MediaTek
MediaTekTaiwan Stock Exchange: 2454: Designs and develops system-on-chip solutions for electronic devices.
10+ YOE10+ years building GPU drivers or low-level systems software; fluent C/C++; deep knowledge of Vulkan/DirectX/OpenCL/OpenGL ES and GPU internals; experience with kernel-mode drivers, firmware, performance optimization.
C, C++, Vulkan, DirectX, OpenGL ES, OpenCL
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3mo
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Principal Machine Learning Engineer
Santa Barbara or San Diego or Denver
$264k-$330k/yr HybridFull Time
AppFolio
AppFolioNASDAQ: APPF: Provides cloud-based property and investment management software.
10+ YOESenior ML/AI leader with 10+ years building production ML systems; deep learning and traditional ML expertise; strong software delivery.
Python, PyTorch, NumPy, AWS, Docker, SQL, Embeddings, RAG, LangChain, LangGraph, LangSmith, Copilot
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3w
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Principal Mobile Developer
Los Angeles or Temecula or Irvine or San Diego
$150k-$220k/yr OnsiteFull Time
BlackBerry
BlackBerryNYSE: BB: Provides cybersecurity software and secure embedded systems for businesses.
Bachelor's or equivalent; experience with C/C++, Java, Python, Android/AOSP, Linux, Agile and continuous integration; strong analytical, debugging, and collaborative skills.
Java, C/C++, Python, Android, AOSP, Linux, Agile, Continuous integration
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2mo
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Principal AI Compiler Engineer
Austin or San Jose or San Diego
OnsiteFull Time
NXP Semiconductors
NXP SemiconductorsNASDAQ: NXPI: Designs and manufactures semiconductors for automotive and IoT applications.
MS/PhD in CS/EE or equivalent; deep AI compiler experience; graph optimization; MLIR/LLVM/TVM; C/C++ and Python; AI workloads; Scrum experience.
MLIR, LLVM, TVM, PyTorch, TensorFlow, ONNX, C++, Python, CUDA
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3w
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Associate Principal, AI Engineering
San Diego, California, United States
$187k-$281k/yr OnsiteFull Time
Illumina
IlluminaNASDAQ: ILMN: Provides genomic sequencing and array-based solutions for genetic analysis.
15+ YOE5+ Mgmt15+ years software engineering experience with 5+ years in architecture/technical leadership; hands-on Python/Java; production Generative AI and RAG experience; cloud (GCP/Azure/AWS) expertise; experience leading distributed teams.
GPT-4, Claude, Gemini, LangChain, LangGraph, AutoGen, CrewAI, OpenAI, Anthropic, Google, Vertex AI, AlloyDB, Cloud Functions, GCP, Azure, AWS, Python, Java SE, Spring Boot, Spring MVC, Spring JPA, Spring REST, Spring Cloud, Hibernate, Docker, Kubernetes, Bamboo, Terraform, Angular, React, Node.js, HTML5, BigQuery, Snowflake, Databricks, Pinecone, Weaviate, pgvector, Kafka, Pub/Sub, Oracle, MySQL, SQL Server, GraphQL
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2mo
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Principal AI Architect
San Diego, California, United States
$217k-$326k/yr OnsiteFull Time
Teradata
TeradataNew York Stock Exchange: TDC: Provides cloud data analytics and enterprise AI software platforms.
10+ YOE10+ years software engineering; 3+ years in senior architect role; expertise in AI/ML platforms, enterprise data platforms, LLM integration; cloud-native architecture.
AWS, Azure, GCP, Kubernetes, Docker, MLflow, Weights and Biases, Hugging Face, LangChain, LangGraph, Teradata Vantage, Snowflake, Databricks, Model registry, Feature store, MLOps
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