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19 full stack application developer jobs at 11 companies in Simi Valley, CA

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Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
3mo
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Full Stack Software Engineer (Application Software)
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
1+ YOEBachelor's in CS/engineering/math or 2+ years software experience; 1+ year full stack development; strong Python/JavaScript/Java etc.
Python, C#.NET, Go, Scala, Java, JavaScript, Docker, Kubernetes, Terraform, Ansible, Puppet, Apache Kafka, RabbitMQ, ActiveMQ, Gradle, Bazel, Pants, Buck, Pip, npm, Unix, Linux
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1mo
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Sr. Full Stack Engineer (Application Software)
Hawthorne, California, United States
$165k-$230k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
5+ YOEBachelor's in CS/engineering/math or 5+ years software experience (or 7+ years without degree); 3+ years full‑stack experience; proficiency in Python, C#.NET, Go, Scala, or Java; SPA, CI/CD, Docker, Kubernetes, data streaming, and system design experience.
Python, C#.NET, Go, Scala, Java, Make, Bazel, Pants, Buck, Gradle, pip, npm, UNIX-like operating systems, Terraform, Ansible, Puppet, Apache Kafka, RabbitMQ, ActiveMQ, Docker, Kubernetes, Angular, React, PostgreSQL, SQL Server
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1mo
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Full-Stack AI Application Contractor
Van Nuys, California, United States
$50-$80/hr OnsiteContract, Part Time
WHY Brands
WHY Brands: Designs and develops consumer lifestyle and baby products.
5+ YOE5+ years full-stack development experience; strong React, TypeScript, JavaScript, Tailwind, backend/API and SQL skills; AI/LLM experience preferred; strong coding, testing, security, and communication skills.
React, TypeScript, JavaScript, Tailwind, SQL, APIs, LLM
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2mo
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Full-Stack Software Engineer (Application Software)
El Segundo, California, United States
$108k-$154k/yr OnsiteFull Time
Rangeview
Rangeview: Operates an automated foundry producing precision metal aerospace parts.
2+ YOE2+ years building production web apps; frontend with TypeScript and React; backend with C#, ASP.NET, Entity Framework; relational DB design; ability to work onsite in El Segundo and meet U.S. Person requirements.
TypeScript, React, C#, ASP.NET, Entity Framework, Next.js, MUI, Hot Chocolate, GraphQL
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1d
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Full Stack Web Developer
Carson, California, United States
$122k-$132k/yr HybridFull Time
See's Candies
See's Candies: Manufactures and retails premium boxed chocolates and candies.
5+ YOE5+ years building server-side and front-end web applications; strong debugging, API, database and security skills; Git and agile experience; familiarity with e-commerce systems.
Node.js, Python, ColdFusion, HTML, CSS, JavaScript, JSON, SQL, Git, Jira, APIs, Claude Code
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1w
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Full Stack Software Engineer, Enterprise Applications
Torrance, California, United States
$120k-$250k/yr OnsiteFull Time
Hadrian
Hadrian: Building autonomous factories for aerospace and defense manufacturing.
Experience building enterprise applications, legal/CLM systems, AI/LLM-powered tools, integrations with Salesforce and NetSuite, and working with ITAR/CUI/GCC compliance.
Salesforce, NetSuite, DocuSign, Microsoft 365 GCC, SharePoint, Power Automate, Teams, Oracle, RAG, LLM
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3mo
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Application Software Engineer
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
1+ YOEBachelor's or 2+ years software experience; 1+ years full-stack development; strong programming in multiple languages.
Python, C#.NET, Go, Scala, Java, UNIX, Terraform, Ansible, Puppet, Docker, Kubernetes, Apache Kafka, RabbitMQ, ActiveMQ, React, Angular, PostgreSQL, SQL Server, Make, Bazel, Pants, Buck, Gradle, pip, npm
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1mo
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Sr. Application Software Engineer
Hawthorne, California, United States
$165k-$230k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
5+ YOEBachelor's degree or equivalent experience; 5+ years software development (or 7+ years without degree); 3+ years full stack development; proficiency with Python, C#.NET, Go, Scala, or Java; experience with CI/CD, containers, Kubernetes, databases, and in-stream data processing.
Python, C#.NET, Go, Scala, Java, Make, Bazel, Pants, Buck, Gradle, pip, npm, Terraform, Ansible, Puppet, Apache Kafka, RabbitMQ, ActiveMQ, Docker, Kubernetes, Angular, React, PostgreSQL, SQL Server
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3w
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Application Software Engineer, Manufacturing
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
1+ YOEBachelor's in CS/engineering/math/science or 2+ years software experience; 1+ years full-stack development; programming in Python, C#.NET, Go, Scala, or Java; SPA, CI/CD, Docker, Kubernetes, UNIX, Kafka, PostgreSQL experience; onsite work required.
Python, C#.NET, Go, Scala, Java, Make, Bazel, Pants, Buck, Gradle, pip, npm, UNIX-like operating systems, Terraform, Ansible, Puppet, Apache Kafka, RabbitMQ, ActiveMQ, Docker, Kubernetes, Angular, React, PostgreSQL, SQL Server
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3d
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Application Software Engineer, Employee Experience
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
1+ YOEBachelor's degree or 2+ years experience,1+ years full‑stack development,knowledge of Python/C#.NET/Go/Scala/Java,experience with web apps,CI/CD,performance tuning,and distributed systems.
Python, C#.NET, Go, Scala, Java, Make, Bazel, Pants, Buck, Gradle, pip, npm, UNIX, Terraform, Ansible, Puppet, Apache Kafka, RabbitMQ, ActiveMQ, Docker, Kubernetes, Angular, React, PostgreSQL, SQL Server
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1mo
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Application Software Engineer, Safety & Training
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
1+ YOEBachelor's in CS/engineering/math or 2+ years software experience; 1+ years full‑stack development; proficiency with Python, C#.NET, Go, Scala or Java; SPA, CI/CD, Docker/Kubernetes, databases, and system design experience.
Python, C#.NET, Go, Scala, Java, Make, Bazel/Pants/Buck, Gradle, pip, npm, Terraform, Ansible, Puppet, Apache Kafka, RabbitMQ, ActiveMQ, Docker, Kubernetes, Angular, React, PostgreSQL, SQL Server
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16h
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Applications Developer
Los Angeles, California, United States
$77k-$123k/yr HybridFull Time
Los Angeles Homeless Services Authority
Los Angeles Homeless Services Authority: Coordinates homeless services and funding across Los Angeles County.
Design, develop, and maintain full-stack ASP.NET applications with SQL Server; strong SQL, front-end (HTML/CSS/JavaScript/jQuery/Bootstrap), Git, and AI-assisted tooling experience; 4–6 years preferred.
ASP.NET, WebForms, MVC, VB.NET, C#, SQL Server, HTML, CSS, JavaScript, jQuery, Bootstrap, GitHub Copilot, Claude, Cursor, Git, Python, IIS, Looker, REST, SOAP, HMIS
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3w
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Senior Software Engineer, RCM Billing
Mountain View or San Francisco or Los Angeles or New York City
$170k-$240k/yr HybridFull Time
Commure
Commure: AI-powered software platform for healthcare workflow and administrative automation.
5+ YOE5+ years building scalable full-stack applications; proficiency with JavaScript/React, Python, and PostgreSQL; strong architecture, observability, performance, and mentoring skills.
ReactJS, React, Vue, JavaScript, Python, PostgreSQL, GraphQL, REST, gRPC, CI/CD, EHRs
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4d
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Staff Software Engineer, RCM Billing
Mountain View or Los Angeles or New York City or San Francisco
$170k-$240k/yr OnsiteFull Time
Commure
Commure: AI-powered software platform for healthcare workflow and administrative automation.
10+ YOE10+ years building scalable full-stack applications; expertise in JavaScript/React or Vue, Python, PostgreSQL; strong architecture, observability, and mentoring skills.
ReactJS, JavaScript, React, Vue, Python, PostgreSQL, GraphQL, REST, gRPC
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1mo
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Product Software Engineer II
Bristol or Glendale
$118k-$158k/yr HybridFull Time
The Walt Disney Company
The Walt Disney CompanyNYSE: DIS: Produces movies, operates theme parks, and provides streaming services.
3+ YOE3+ years backend or full-stack web applications; strong Java/Java EE/JVM; REST APIs; NoSQL; agile; collaboration.
Java, REST, NoSQL, AWS
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2d
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Staff Software Engineer - Biller Workflows
Mountain View or Los Angeles or New York City or San Francisco
$210k-$275k/yr HybridFull Time
Commure
Commure: AI-powered software platform for healthcare workflow and administrative automation.
8+ YOE8+ years building large-scale full-stack applications; org-wide frontend leadership; deep React/TypeScript, Python, and PostgreSQL expertise; API and data-layer design; strong debugging, observability, and communication skills.
React, TypeScript, Python, FastAPI, PostgreSQL, StarRocks, ClickHouse, Druid, EDI X12, LLM, CI/CD
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1mo
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Senior Manager IT Engineering Applications - Java Full-Stack Development, Azure Cloud, Databricks
Pasadena, California, United States
OnsiteFull Time
Kaiser Permanente
Kaiser Permanente: Provides integrated medical care and health insurance plans.
6+ YOE3+ MgmtLead engineering ownership of NPS app, Java full-stack, Azure, Databricks; manage vendors; build in-house capability; production stability and delivery.
Java, Databricks, Azure, Microservices, Cloud computing
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2w
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Senior Staff Software Engineer (Remote)
United States or Los Angeles
$241k-$283k/yr RemoteFull Time
Rula
Rula: Connects patients with insurance-covered therapists through a digital platform.
10+ YOE10+ years building full-stack, database-backed web applications and microservices; proven technical leadership; distributed systems expertise; mentoring and architecture review experience.
NodeJs, Typescript, Kafka, Amazon Web Services (AWS), FHIR, HL7
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3d
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Software/Principal Software Development Analyst
Redondo Beach, California, United States
$92k-$138k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
2+ YOEDevelop and maintain full‑stack web applications (Angular front end, .NET/ASP.NET Core back end, SQL Server); design/optimize T‑SQL and EF Core queries; 2+ years software experience (higher levels described); strong communication and problem‑solving skills.
Angular, ASP.NET Core, .NET, SQL Server, Entity Framework Core, Bootstrap, DevExtreme, C#, T-SQL, Azure DevOps, Git, MySQL, Postgres, Mongo, Redshift, Oracle, GoLang, Perl, C++, Ruby, JavaScript, React, Vue
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