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221 software developer internship jobs at 117 companies in California

PromotedHiringCafe
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
3w
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Software Engineer Internship
San Francisco, California, United States
$65/hr OnsiteFull Time, Internship
Lindy
Lindy: AI-powered platform for building and managing autonomous virtual assistants.
Currently enrolled in CS/Software Engineering or related program; experience with JavaScript/TypeScript or Python; exposure to AI/ML and web development; built side projects; teamwork and passion for AI.
TypeScript, GraphQL, Relay, Kubernetes, GCP, Python, JavaScript
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5d
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Software Engineer
Colorado Springs or Irvine or Longmont or Fremont or Rochester or San Jose
$111k-$148k/yr OnsiteFull Time
Western Digital
Western DigitalNASDAQ: WDC: Design and manufacture data storage devices and systems.
0+ YOEPursuing or recent Bachelor's/Master's in a technical field; experience with C/C++, Python, Java, Go, SQL, or JavaScript through coursework or internships; familiarity with software fundamentals, debugging, and development tools.
C, C++, Python, Java, Go (Golang), SQL, JavaScript, Microsoft Office, Git, Linux, IDEs
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1w
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Software Engineer I, Mission Software
Long Beach, California, United States
$111k-$157k/yr OnsiteFull Time
Vast
Vast: Develops and operates commercial artificial-gravity space stations.
1+ YOEBachelor's in CS/math/engineering required; 1+ year academic/internship software experience preferred. Experience with full-stack development, APIs, containers, time-series data, and modern web frameworks.
Docker, Kubernetes, React, Next.js, Vue, GraphQL, REST, RPC, Node.js, OAuth, Terraform, Helm, SQL, Monitoring, Observability, Instrumentation
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3mo
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Software Engineer, Safety
San Francisco, California, United States
$127k-$185k/yr OnsiteFull Time
Amazon
AmazonNASDAQ: AMZN: Global online retail and cloud computing technology provider.
1+ YOE1+ years non-internship software development; 1+ years professional experience; knowledge of modern languages/frameworks; strong CS fundamentals; Bachelor's in Computer Science or equivalent.
Golang, Typescript/React, iOS, Android, AWS (ECS, DynamoDB, Lambda, SQS, Step Functions)
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1w
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Software Engineering- Internship
California or United States
$55-$65/hr RemoteInternship
Deepgram
Deepgram: Provide real-time APIs for automated speech-to-text and voice AI.
Pursuing CS/engineering or equivalent skills; ability to write and read code, ship scoped projects, use AI in workflows, reason from first principles, and communicate work clearly.
ASR, TTS, LLM, APIs, AI
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3mo
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Software Engineer, New Grad
San Jose, California, United States
$100k-$150k/yr OnsiteFull Time
FlexAI
FlexAI: Universal AI compute infrastructure for developers and enterprises.
0+ YOEBachelor's or Master's in CS/Software Engineering; internship; strong coding in Python/Go/Java/JavaScript; experience with AI coding tools; solid data structures and algorithms; web/API development; quick learner; good collaboration.
Python, Go, Java, JavaScript, AI tools (Claude, Codex, Others)
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1mo
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Software Engineer
San Francisco, California, United States
$162k-$174k/yr HybridFull Time
Klaviyo
KlaviyoNYSE: KVYO: Customer data platform for e-commerce marketing and automation.
Master's degree in CS/CE/SE/Electronics/Electrical required. Experience with Python, AWS cloud technologies, Agile Scrum, and UI/UX via coursework, project, thesis, or internship.
Python, AWS, Agile Scrum, UI/UX, Covey Scout
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1mo
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Software Engineer, Ads Product
Palo Alto, California, United States
$150k-$350k/yr OnsiteFull Time
xAI
xAI: Develops advanced artificial intelligence systems to understand the universe.
0+ YOEStrong software engineering fundamentals; interest in backend systems, data pipelines, or AI applications; ownership mindset; ability to ship; proven experience via internships, projects, research, open-source, startups, or full-time roles.
React, Golang, Python, Rust, gRPC, Java, Scala
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3mo
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SWE Internship (Summer 2026)
San Francisco, California, United States
OnsiteInternship
Blackstar Computers
Blackstar Computers: Building AI-native personal computing hardware and software systems.
Pursuing/completed degree in computer science or related field; seeking software engineering internship.
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2w
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Software Engineer, Intern
San Francisco, California, United States
OnsiteInternship, Full Time
Pylon
Pylon: AI-native customer support platform for B2B companies.
Pursuing a BS/MS in computer science or related field, graduating Dec 2026–Summer 2027; willing to relocate to San Francisco; strong full‑stack fundamentals; internship or side projects preferred.
React, Golang, GraphQL, AWS
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2mo
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Software Engineer Intern- Runtime, Robotics
Santa Clara, California, United States
$19-$65/hr OnsiteInternship
PlusAI
PlusAI: AI-based virtual driver software for factory-built autonomous trucks.
Internship focused on integrating ROS2 into a high-performance robotics software stack; proficiency in C++, ROS2, and Linux; ability to benchmark and optimize performance; on-vehicle deployment experience desired.
C++, ROS2, DDS, ROS Middleware, Linux
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1mo
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Software Engineer - Consumer Medical Testing
Fremont, California, United States
$124k-$133k/yr OnsiteAll Commitments Available
UL Solutions
UL SolutionsNYSE: ULS: Provides safety science testing, inspection, and certification services globally.
4+ YOESoftware development experience; JavaScript/TypeScript; HTML/CSS; React; Node.js; 4 years total; US work authorization; onsite Fremont, CA; Bachelor's in CS.
HTML, CSS, Tailwind CSS, JavaScript, TypeScript, React.js, antd, shadcn, Redux, React Context API, Node.js, Python, Express.js, SQLite, MySQL, MongoDB
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2mo
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Software Engineer Intern
San Francisco, California, United States
OnsiteInternship
Kos
Kos: AI-powered automated financial operations for industrial infrastructure.
CS/ML student; hands-on project or internship; proficient in Python, TypeScript, or Go; experience with LLMs/agents; production-ready coder; able to work in SF onsite.
Python, TypeScript, Go, LLMs, agents, ERP integration
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1mo
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Software Engineer Intern
San Diego, California, United States
$24-$39/hr HybridFull Time, Internship
Sony
SonyNYSE: SONY: Sells consumer electronics, video games, and entertainment media.
Currently enrolled undergraduate or graduate student in software engineering or related field; experience with Golang, Rust, NodeJS, MySQL, Vue, React; familiarity with Linux and shell; AWS, Docker, and CI/CD experience preferred.
Golang, Rust, NodeJS, MySQL, Vue, React, Linux, shell languages, AWS, Docker, CI/CD
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2mo
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Software Engineer Intern
Redwood City, California, United States
$35-$40/hr HybridInternship, Temporary
PubMatic
PubMaticNASDAQ: PUBM: Operates a global digital advertising supply chain technology platform.
1+ YOEBS/MS in Computer Science (or equivalent); 1+ years development in C/C++ on Linux/UNIX; strong DS&A, OS/system programming, multithreading, production troubleshooting; scripting (Perl/Python/Shell) and MySQL experience.
C, C++, Linux/UNIX, Perl, Python, Shell, MySQL, Go
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4d
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Software Engineering Intern, Device Experiences
San Francisco, California, United States
OnsiteFull Time
HP
HPNYSE: HPQ: Manufactures personal computers, printers, and 3D printing hardware.
Internship in software engineering focused on device experiences; role entails participating in software development and team projects.
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1mo
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Software Engineer (2027 University Grad)
Sunnyvale, California, United States
$130k-$160k/yr OnsiteFull Time
Cylake
Cylake: Developing an AI-native cybersecurity platform for sovereign environments.
Bachelor's or Master's in Computer Science or related field, strong problem-solving and communication, internship or project experience encouraged; entry-level graduates welcomed.
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2mo
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Software Engineer Intern - Backend Focused - Winter 2027
New York or San Francisco or Seattle
OnsiteInternship, Temporary
Rippling
Rippling: Unified platform managing workforce HR, IT, and finance operations
Current undergraduate/graduate student in CS or related field, previous software engineering internship experience with Python, backend programming skills, strong communication and critical thinking.
Python, Slack, Microsoft 365
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2mo
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Sr. Software Engineer - Full Stack
Fremont, California, United States
$150k-$175k/yr HybridMultiple Commitments Available
Personalis
PersonalisNASDAQ: PSNL: Provides genomic sequencing and diagnostic testing for cancer management.
5+ YOE5+ years in software development; strong Java (Spring Boot) and React; full-stack; microservices, Docker, Kubernetes; healthcare/biotech experience a plus.
Java, Spring Boot, ReactJS, ES6, HTML5, CSS3, Docker, Kubernetes, Jenkins, HL7, FHIR
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1mo
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Software Engineer
Rancho Santa Margarita, California, United States
$38-$80k/yr OnsiteFull Time, Internship
Melissa
Melissa: Provides global address, identity, and contact data quality solutions.
BS in Computer Science or related (or equivalent experience); experience with C#/.NET, large-scale data processing, ETL, REST APIs, databases; strong problem-solving and communication skills.
C#, .NET, Microsoft SQL Server, Apache Kafka, REST APIs, Linux, Windows, Cassandra, ElasticSearch, CouchDB
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