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106 sr principal software engineer jobs at 31 companies in San Marcos, 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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2mo
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Principal/Sr Principal Engineer Link 16 Embedded Software
San Diego or United States
$114k-$213k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
5+ YOERequires STEM degree plus 5+ years (Principal) or 8+ years (Sr Principal) experience; proficiency in C/C++, OOP, embedded real-time systems, Link-16 waveform testing, Jira/Bitbucket/Git, ability to obtain U.S. Secret clearance, and onsite work in San Diego.
C/C++, Object Oriented programming, Jira, Bitbucket, Git, Link-16, TACAN, CORBA, SCA, Software Defined Radios, Vitis, Vivado, Yocto/Petalinux, Zynq, Ultrascale+, VERSAL, I2C, SPI, UART, PCIe, Ethernet, TCP/IP, Rust, Rhapsody, DOORS, Clearcase, Green Hills AdaMulti, Assembly language, PowerPC
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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: Manufactures medical devices, surgical instruments, and pharmacy automation systems.
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
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 Software Engineer
San Diego, California, United States
$190k-$210k/yr OnsiteFull Time
Mainstay Medical
Mainstay Medical: Irish medical device commercializing an implantable restorative neurostimulation system for adults with 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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CPU Software Architecture Principal Engineer
San Diego, California, United States
$193k-$289k/yr OnsiteFull Time
Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc.: Developing semiconductor, wireless, connectivity, automotive, AI, and computing technologies for device and enterprise customers.
8+ YOEBachelor's +8 yrs (or Master's +7 yrs, PhD +6 yrs) software engineering experience; 4+ yrs programming in C, C++, Java, Python; experience with embedded/firmware, ARM CPU architecture and performance optimization; strong debugging and collaboration skills.
C, C++, Java, Python, ARM assembly, Linux, zephyr RTOS, ARMv8, ARMv9, RISCV
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Principal, Software Engineer
Lake Forest, California, United States
$128k-$166k/yr OnsiteFull Time
Alcon
AlconNYSE: ALC: Manufactures ophthalmic surgical equipment and vision care products.
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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6d
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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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1mo
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Principal Software Developer
San Diego, California, United States
$121k-$181k/yr OnsiteFull Time
Solar Turbines
Solar TurbinesNYSE: CAT: Manufacturer of industrial gas turbines and turbomachinery systems.
7+ YOE7+ years experience with C#, VB.NET, Python, TypeScript and .NET; database design with Oracle/SQL; WinForms/WinUI/XAML experience; ORM (Entity Framework,Dapper); frontend with ReactJS/Angular; degree in engineering/CS/IS.
C#, VB.NET, Python, TypeScript, .NET, Oracle, SQL, WinUI, XAML, WinForms, Entity Framework, Dapper, ReactJS, Angular
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3w
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Principal Software Development Engineer
Escondido or San Diego
$140k-$200k/yr HybridFull Time
One Stop Systems
One Stop SystemsNASDAQ: OSS: Public U.S. manufacturer of rugged edge-computing hardware and software for AI, sensor processing, autonomy, defense, and industrial customers.
5+ YOEB.S. in Software Engineering and 5+ years' experience. Strong TypeScript, Angular, RxJS, web APIs, testing, Git, and debugging skills; excellent communication and problem-solving.
HTML DOM, Fetch, XHR, Storage, UI Events, Navigation, TypeScript, ReactiveJS (RxJS), AI-assisted programming tools, Angular 14+, PrimeNG, Chart.js, Cypress, Git, Microsoft Office Suite, Adobe Acrobat, Revit, AutoCAD
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3d
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Software Engineer Principal
San Diego, California, United States
HybridFull Time
SAIC
SAICNASDAQ: SAIC: Premier technology integrator for defense, space, and civilian markets.
7+ YOEBachelor's with 9 years or master's with 7 years; US citizenship; Top Secret clearance and ability to obtain TS/SCI; IAT Level 1 certification; full-stack, cloud, database, Linux, and shell scripting experience.
Java, JavaScript, Python, Node.js, D3.js, React, AWS, Microsoft Azure, SQL, Linux, Shell, PostgreSQL, MongoDB, Apache NiFi, Kubernetes, ETL
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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: Developer of AI-powered autonomous systems for defense and aerospace.
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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3mo
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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: Provider of commercial and residential real estate information and marketplaces.
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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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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1w
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Principal / Senior Staff Software Engineer ( 5G PHY )
San Diego, California, United States
$200k-$230k/yr OnsiteFull Time
Globalstar
GlobalstarNYSE American: GSAT: Global provider of satellite communications and IoT connectivity solutions.
10+ YOEBachelor’s degree in computer science, computer engineering, or related field; 10+ years C/C++ software development; 7+ years 5G/LTE PHY software and algorithms; 5+ years real-time Linux development.
C, C++, Linux, Wireshark, tcpdump, Microsoft Office, NetSuite
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2w
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Principal SW Engineer
San Diego, California, United States
OnsiteFull Time
Cohu
CohuNASDAQ: COHU: Provides semiconductor test, handling, and inspection equipment and services.
15+ YOEBachelor's or master's degree in a related engineering or computer science field, 15+ years of software engineering experience, expert C/C++ skills, Windows development, hardware integration, troubleshooting, and communication abilities.
C++, C#, Microsoft Visual Studio, Windows APIs, SDKs, Git, Python, Jira, WPF, WinForms, Qt, Jenkins, CI/CD, RS-232, RS-485, USB, Ethernet, TCP/IP, CAN, I2C, SPI, SECS/GEM, E5, E30, E37, HSMS, ISO 13849
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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: Mobile video game developer and publisher creating games for players worldwide as a Take-Two subsidiary.
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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2mo
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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: Global fabless semiconductor providing system-on-chip solutions.
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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1w
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Senior Principal Software Engineer (Sign On Bonus Available)
Hudson or Austin or San Diego
$133k-$226k/yr OnsiteFull Time
BAE Systems
BAE SystemsLSE: BA.: Global defense, aerospace, and security technology.
8+ YOEActive DoD Secret clearance, bachelor's degree in computer science, computer engineering, or related field, and 8+ years' experience. Requires C++, Linux, embedded or application development, testing, and technical leadership.
C++, Linux, Git, Jira, Confluence, Clearcase, Bit Bucket
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2w
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Principal Software Engineer - Multi-Cloud Control Plane - Kubernetes
Santa Clara or San Diego or Kirkland or Santa Clara
$255k-$445k/yr HybridFull Time
ServiceNow
ServiceNowNYSE: NOW: Enterprise software providing cloud-based workflow automation platforms.
12+ YOE12+ years designing, building, and operating large-scale distributed systems; deep Kubernetes and hyperscaler expertise; strong Go programming; technical leadership across engineering teams.
Kubernetes, AWS, Azure, GCP, EKS, AKS, GKE, Crossplane, GitOps, CNI, Go, SPIFFE, SPIRE, Kata Containers, FedRAMP, OCI
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