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22 frontend software intern jobs at 15 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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1mo
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Frontend Software Engineer Project Intern (Global CRM) - 2026 Start（BS/MS）
San Jose, California, United States
OnsiteInternship
TikTok
TikTok: Global short-form video hosting and social media platform.
Pursuing a BS/MS in CS or related field; proficient in HTML,CSS,JavaScript; strong communication and teamwork; responsible and self-motivated.
HTML, CSS, JavaScript, HTML5, CSS3, Node.js, Webpack, React, Vue.js, AngularJS, Bootstrap, Pure, Kendo
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6d
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Frontend Engineer Intern (6 month internship)
Los Angeles or Playa Vista
$30/hr HybridInternship
Centerfield
Centerfield: Drives customer acquisition through performance marketing and digital brands.
Front-end development knowledge with React, JavaScript/TypeScript, HTML5, CSS/Tailwind, and exposure to Next.js, Node.js, APIs, source control, and debugging; pursuing a relevant degree or recently graduated.
React, Next.js, TypeScript, JavaScript, HTML5, CSS, Tailwind, Node.js, Java, Claude Code, Codex, GCP, AWS, REST APIs, Vercel, Docker, MCP servers
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4w
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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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1mo
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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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3mo
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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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3mo
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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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3mo
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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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1d
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Software Internship
Long Beach, California, United States
$30-$35/hr OnsiteInternship
Advanced Spade Company
Advanced Spade Company: A developing hardware, software, and operational tools for underground construction.
Software interns join embedded, backend, or frontend engineering teams, complete defined projects, and collaborate across teams with dedicated mentorship.
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2w
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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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2mo
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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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1mo
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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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1w
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Full-Stack Product Engineering Intern
San Francisco, California, United States
OnsiteInternship, Part Time
NextClerk
NextClerk: Automated revenue and billing software for subscription businesses.
Pursuing or recently completed bachelor's in CS or related field; experience with JavaScript/TypeScript and frontend frameworks; basic backend experience (Python/Node.js); familiarity with APIs, databases, and Git.
JavaScript, TypeScript, React, Next.js, Vue, Angular, Python, Node.js, PostgreSQL, Git, APIs, CI/CD, containers, cloud services
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1mo
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Full Stack Engineer - Internal Audit
Bengaluru or San Francisco
OnsiteFull Time
Cloudflare
CloudflareNYSE: NET: Provides security and performance services for internet properties.
5+ YOE5+ years full stack engineering experience; strong backend (Python, Go, Node.js) and frontend (React, TypeScript); SQL/NoSQL, API design, cloud-native architectures (Cloudflare Workers, AWS/GCP); familiarity with data pipelines, LLMs/ML, and audit/risk concepts.
Python, Go, Node.js, React, TypeScript, SQL, NoSQL, REST, GraphQL, Cloudflare Workers, KV, D1, AI Gateway, AWS, GCP, LLMs, ETL, ELT
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