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1,084 developer intern jobs at 549 companies in California

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Web Developer Intern
Rancho Cordova, California, United States
$23-$27/hr OnsiteMultiple Commitments Available
GEI Consultants
GEI Consultants: Provides multi-disciplinary engineering and environmental consulting services.
HTML, JavaScript, CSS, AJAX; Java/JSP/ASP.NET/XML/JSON; databases Oracle/Access/SQL Server; timely, high-quality deliverables; self-motivated; computer science/engineering major; able to work at Sacramento office.
HTML, JavaScript, CSS, AJAX, Java, JSP, ASP.NET, XML, JSON, Oracle, SQL Server, Access
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2mo
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Web Developer Intern
Rancho Cordova, California, United States
$23-$27/hr OnsiteInternship
GEI Consultants
GEI Consultants: Professional engineering and environmental consulting services.
0+ YOEProficient in HTML, JavaScript, CSS, and AJAX; knowledge of Java, JSP, ASP.NET, XML, JSON; experience with databases (Oracle, Access, SQL Server); reliable, self-motivated, detail-oriented; able to work on site in Sacramento area.
HTML, JavaScript, CSS, AJAX, Java, JSP, ASP.NET, XML, JSON, Oracle, Access, SQL Server
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Software Engineer Intern
San Francisco, California, United States
OnsiteFull Time
Phonely
Phonely: AI-powered voice platform for automated customer phone interactions.
Pursuing or recently completed degree in Computer Science or related field; experience with JavaScript/TypeScript and modern frontend frameworks; familiarity with Next.js; strong problem-solving and debugging skills; ability to work with customers and teammates; eager to learn quickly.
JavaScript, TypeScript, React, Next.js, Python, AWS, GCP, Kubernetes, Redis, Datadog
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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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4w
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Software Engineer Intern (Fall 2026)
South San Francisco, California, United States
$54/hr OnsiteFull Time, Internship
Zipline
Zipline: Operates an autonomous drone delivery system for medical supplies.
Must have completed second year of undergraduate studies (masters/PhD also eligible); strong CS fundamentals, passion for software development and product-focused engineering.
React Native, Python, Go
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OCI Software Engineer Intern - OVIP
Seattle or Santa Clara
$38k-$72k/yr OnsiteFull Time
Oracle
OracleNYSE: ORCL: Provides cloud infrastructure and enterprise software for global businesses.
Experience with application development; programming in Java, JavaScript, C/C++, Python, Go; understanding data structures, algorithms, distributed systems; networking (TCP/IP, HTTP); databases/NoSQL; strong written and verbal communication; familiarity with agile methods.
Java, JavaScript, C, C++, Python, Go, TCP/IP, HTTP, NoSQL, Databases, Distributed systems
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Engineer Intern
Redding, California, United States
OnsiteInternship
J.F. Shea
J.F. Shea: Constructs large-scale infrastructure and residential communities across America.
Pursuing a bachelor’s degree in construction management or civil engineering; strong communication; proficient in Microsoft Office; detail-oriented and proactive.
Microsoft Office, Excel, Word, Outlook, PowerPoint, Construction Software
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1mo
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Engineer intern
Simi Valley, California, United States
OnsiteMultiple Commitments Available
M Wave Design
M Wave Design: Designs and manufactures passive RF and microwave components.
Currently enrolled in an engineering or science program (BSME/BSEE in process or equivalent), US person required, ability to work with technical drawings, basic CAD (SolidWorks/AutoCAD) exposure, strong communication and teamwork skills.
SolidWorks, AutoCAD
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Research Engineer Intern
Santa Clara, California, United States
$19-$65/hr OnsiteInternship
PlusAI
PlusAI: AI-based virtual driver software for factory-built autonomous trucks.
Pursuing MS or PhD in Computer Science, Electrical Engineering, Robotics or related field; programming in Python and C++; experience in 3D computer vision; internship focused on reconstruction, auto labeling and mapping.
Python, C++, 3D computer vision
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Firmware Engineer Intern
Irvine, California, United States
OnsiteInternship
Fluxergy
Fluxergy: Portable diagnostic platform for rapid point-of-care laboratory testing
0+ YOEEnrollment in a Bachelor’s or Master’s program; 30-40 hours/week; proficiency in C/C++; RTOS exposure; strong problem-solving and communication skills.
C/C++, RTOS, Git, Embedded systems
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Software Engineer Intern - Generalist
Fremont, California, United States
OnsiteInternship
Pony.ai
Pony.aiNASDAQ: PONY: Develops autonomous driving technology for passenger and freight transportation.
Strong programming in C/C++, Python; strong math/theory; interest in large-scale systems; pursuing CS degree; experience with large data, real-time systems; full-stack experience preferred; statistics experience preferred.
C, C++, Python, Software Design, Big Data, Real-time Systems
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1mo
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2027 Software Engineer Intern
Costa Mesa or Irvine or Atlanta or Seattle or Boston or Reston
$45-$50/yr OnsiteInternship, Full Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
Pursuing a Bachelor\u0002s in CS or related field, rising senior returning to school, proficiency in C++, Go, Rust, Java, or Python, familiarity with algorithms, data structures, cloud and front-end concepts, and U.S. Person status required.
C++, Go, Rust, Java, Python, Lattice OS
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2mo
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Software Engineer Intern (2026 Summer)
San Diego, California, United States
$5k-$7k/mo OnsiteInternship
Whova
Whova: All-in-one platform for event management and attendee engagement.
Currently enrolled as a junior/senior, master’s, or doctoral student in a computer science/engineering field; strong understanding of data structures, algorithms, and computer systems.
JavaScript, TypeScript, HTML, CSS, REST APIs, Front-end development, Back-end development
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3mo
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Software Engineer Intern (Fall 2026)
San Francisco, California, United States
HybridInternship
Notion
Notion: Provides a unified workspace for notes, documents, and project management.
0+ YOEPursuing a bachelor's or master's in CS/engineering; must graduate before Summer 2027; prior internship experience; proficient in TypeScript, Node.js, or Python.
Typescript, Node.js, Python, React
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3mo
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Intern
Redding, California, United States
OnsiteAll Commitments Available
Fellowship of Christian Athletes
Fellowship of Christian Athletes: Provides Christian ministry and mentorship to athletes and coaches.
Internship experience designed to develop student athletes and expose them to ministry; interns are volunteers and may receive a nominal living stipend.
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2mo
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AI Kernel Engineer Intern - Kernel Optimization
Burlingame, California, United States
$45-$60/hr OnsiteTemporary, Internship
Quadric
Quadric: Designing licensable processor IP for on-device AI inference.
MS student in CS/CE or related fields; proficient in C/C++/Python; experience in kernel implementation and optimization; experience in performance profiling.
C++, Python, ONNX, Profiling Tools
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Software Engineer Intern - Machine Learning Workflow
Santa Clara, California, United States
$20-$30/hr OnsiteInternship, Temporary
Halo Industries
Halo Industries: Manufactures silicon carbide wafers using laser-based slicing technology.
0+ YOEPursuing or recent graduate in software/CS/engineering; Python or C# experience; works with structured workflows and large datasets; able to debug issues and follow processes.
Python, C#, Git
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2mo
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Software Engineer Intern (Fall / Winter 2026)
San Francisco or Canada
RemoteInternship
Cohere
Cohere: Provides enterprise-grade large language models and AI software platforms.
Enrolled in a post-secondary program; available for a full-time 3-6 month internship; remote; roles across frontend, backend, full-stack, and infrastructure.
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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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1mo
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Intern
Ontario, California, United States
RemoteInternship
Falcon Wealth Planning
Falcon Wealth Planning: Fee-only firm providing comprehensive financial planning and investment management.
Seeking a professional, detail-oriented, eager-to-learn intern to support Operations, Financial Planning, Client Service, Marketing, Business Development, Compliance, and Administration.
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