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20 frontend developer intern jobs at 12 companies in California

2mo
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Senior Frontend Engineer, Business Systems
San Mateo, California, United States
$180k-$280k/yr OnsiteFull Time
Verkada
Verkada: Sells integrated AI-powered cloud physical security hardware and software.
4+ YOE4+ years frontend software engineering; shipped customer-facing products or internal tools; startup pace; strong customer experience focus; modern frontend frameworks; bonus Salesforce/NetSuite/HRIS experience
Frontend frameworks, Salesforce, NetSuite, HRIS
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22h
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Frontend Engineer Intern (TikTok-Open Platform) - 2027 Summer
San Jose, California, United States
OnsiteInternship
TikTok
TikTok: Global short-form video hosting and social media platform.
Currently pursuing a relevant undergraduate/graduate degree; 12-week summer availability; basic web fundamentals (HTML,CSS,JavaScript); willingness to learn modern frameworks; problem-solving and communication skills.
HTML, CSS, JavaScript, React, Vue, HTTP
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2w
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Senior Software Engineer - Frontend Developer Experience
San Francisco or New York City or Portland or Canada or United States
$201k-$251k/yr HybridFull Time
Mercury
Mercury: Banking services and financial software designed for startup companies.
6+ YOE6+ years frontend software experience with deep React and TypeScript knowledge; experience leading cross-team engineering projects and maintaining internal libraries; strong communication and observability skills.
React, TypeScript, Vite, CI/CD
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2mo
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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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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 / 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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Full Stack Software Engineer Intern - Winter 2027
San Francisco or New York City or Seattle
OnsiteInternship
Rippling
Rippling: Unified platform managing workforce HR, IT, and finance operations
Currently enrolled in a Bachelor’s or Master’s in CS or related field; prior internship/Co-op experience; backend experience with Python and frontend with JavaScript and HTML/CSS; strong communication and problem-solving skills.
Python, JavaScript, HTML/CSS, Slack, Microsoft 365
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2w
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Design Engineer Intern
San Francisco, California, United States
$8k-$10k/mo OnsiteInternship
Gumloop
Gumloop: Platform for building AI automated workflows without code.
Final-year student in design, CS, or related field with hands-on TypeScript and React experience, portfolio, product intuition, and exposure to design systems and frontend development.
TypeScript, React, Tailwind CSS, Next.js, TanStack Query, Figma
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1w
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Software Engineer Intern - Enterprise Systems (Fall 2026)
San Francisco, California, United States
$29/hr OnsiteInternship
Astranis
Astranis: Builds and operates small geostationary communications satellites.
Currently pursuing a B.S. or M.S. in CS/ECE/CE, experience with Python, ability to design/write/test software; embedded, frontend, and devops experience are a plus.
Python
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3w
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Software Development Intern
California, United States
$26-$40/hr RemoteFull Time
iHerb
iHerb: Global e-commerce retailer of health and wellness products.
Pursuing BS/MS in CS or related field; proficiency in C# or Java; backend/API or frontend experience; familiarity with REST, messaging, CI/CD, containers; strong communication and troubleshooting skills.
Microsoft .NET, C#, Java, TCP/IP, UDP, PLC, Prometheus, Grafana, OpenTelemetry, Docker, Kubernetes, RabbitMQ, Kafka, Redis, Android, ASP MVC, ReactJS, ReactNative, CI/CD
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1mo
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Software Engineer, Internal Applications - Enterprise
San Francisco, California, United States
$293k-$342k/yr RemoteFull Time
OpenAI
OpenAI: Develops artificial intelligence models and generative AI software services.
Experienced in building production frontend and backend systems, designing interfaces for operational/internal tools, strong backend fundamentals (APIs, data modeling, integrations), security-conscious design, and cross-functional collaboration.
IAM, ITSM, RBAC, Zero Trust, APIs, SOC 2, ISO 27001, FedRAMP, NIST
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2w
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Full Stack Software Engineer - Camera & Photos Tools & AI Team
Cupertino, California, United States
OnsiteFull Time
Apple
AppleNASDAQ: AAPL: Designs and sells consumer electronics, software, and online services.
Build internal imaging tools and end-to-end software using native Swift, modern web frontends, and Python backends; integrate AI/LLM models; collaborate with engineering and science teams to deliver reliable tools.
Swift, Python, LLM
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