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Frontend Development Intern Jobs in California (NOW HIRING)

PlusAI

Full Stack Engineer Intern

Santa Clara, CA

$19 - $65/hr

Full-Stack Web Development: Strong proficiency building modern web applications end-to-end - front-end frameworks (e.g., React/TypeScript) and back-end services/APIs (e.g., Python/FastAPI) - with an ...

PlusAI

Full Stack Engineer Intern

Santa Clara, CA · On-site

$19 - $65/hr

Full-Stack Web Development: Strong proficiency building modern web applications end-to-end - front-end frameworks (e.g., React/TypeScript) and back-end services/APIs (e.g., Python/FastAPI) - with an ...

FlightStory

Junior Software Engineer

Los Angeles, CA · On-site

$95K/yr

... an intern. Ship features that directly hit users, with a level of ownership and autonomy most ... Design, build, and ship end-to-end product features across frontend, backend, and infrastructure

Triunity Software

Java full stack Developer

Oakland, CA · On-site

$90K - $100K/yr

Full-Stack Development: Design, develop, and manage both front-end and back-end systems, ensuring ... Be it expert or intern Triunity always always value its own people and give them platform to excel ...

Avala AI, Inc

Product Designer

San Francisco, CA · On-site

If an intern has the best idea you will take it and implement it. If you are wrong in an assumption ... development. * Understanding of basic front end languages like HTML, CSS3, JavaScript, and ...

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Frontend Development Intern information

What does a frontend development intern do?

A Frontend Development Intern assists in building and maintaining the user-facing parts of websites or web applications. They typically work with technologies like HTML, CSS, and JavaScript to create interactive and visually appealing interfaces. Interns may also help debug code, test features, and collaborate with designers and backend developers to ensure a seamless user experience. This role is a great opportunity to gain hands-on experience and learn modern frontend frameworks such as React or Angular.

What is the difference between Frontend Development Intern vs Frontend Developer?

AspectFrontend Development InternFrontend Developer
CredentialsTypically pursuing or recently completed relevant coursework or degreeFormal degree or equivalent experience in computer science or related field
Work EnvironmentInternship programs, entry-level projects, supervised tasksFull-time or part-time professional roles, independent project handling
Industry UsageCommon in tech companies, startups, and agencies for training purposesCore role in software development teams across industries
Search & Comparison IntentUnderstanding entry-level opportunities and learning pathsSeeking full-time employment or career advancement

The main difference between a Frontend Development Intern and a Frontend Developer lies in experience, responsibilities, and career stage. Interns are usually students or recent graduates gaining practical experience under supervision, while developers are full-time professionals responsible for building and maintaining web interfaces independently. Both roles are essential in the tech industry, but they serve different purposes in career development and project execution.

What types of projects and technologies can a frontend development intern expect to work with during their internship?

As a Frontend Development Intern, you will typically work on real-world web or mobile applications using technologies like HTML, CSS, JavaScript, and popular frameworks such as React or Angular. Projects may include building user interfaces, implementing responsive designs, fixing bugs, and collaborating with designers and backend developers. Interns often participate in code reviews, agile meetings, and version control using Git, gaining hands-on experience in modern development workflows. This exposure helps interns build a strong foundation in both technical and teamwork skills, preparing them for more advanced roles in the future.

What skills and qualifications are needed to thrive as a frontend development intern?

To thrive as a Frontend Development Intern, you need a solid grasp of HTML, CSS, and JavaScript, along with a foundational understanding of responsive web design and version control systems like Git. Familiarity with frameworks such as React or Angular, and tools like npm or webpack, can be highly beneficial. Strong problem-solving skills, attention to detail, and effective communication help interns collaborate within teams and learn quickly. These skills and qualities are crucial for building user-friendly interfaces and adapting to the fast-paced demands of web development.
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Frontend Development Intern jobs near you
Infographic showing various Frontend Development Intern job openings in California as of August 2026, with employment types broken down into 1% As Needed, 81% Full Time, 14% Part Time, 2% Temporary, and 2% Contract. Highlights an 91% Physical, 3% Hybrid, and 6% Remote job distribution.

Full Stack Engineer Intern

PlusAI

Santa Clara, CA

$19 - $65/hr

Full-time, Internship

Retirement

Re-posted 28 days ago

Job description

PlusAI is a Physical AI company pioneering AI-based virtual driver software for factory-built autonomous trucks. Headquartered in Silicon Valley with operations in the United States and Europe, Plus was named by Fast Company as one of the World's Most Innovative Companies. Partners including TRATON GROUP's Scania, MAN, and International brands, Hyundai Motor Company, Iveco Group, Bosch, and DSV are working with Plus to accelerate the deployment of next-generation autonomous trucks. If you're ready to make a huge impact and drive the future of autonomy, Plus is looking for talented individuals to join its fast-growing teams.
Responsibilities:

  • Build the Metrics Visualization Hub (Full-Stack): Design and ship an end-to-end web application - front-end dashboards through back-end services - that makes autonomous-vehicle product metrics, route analytics, and pipeline health easy to explore for engineering and operations teams.

  • Deliver Low-Latency Data Access: Build a caching and pre-aggregation layer to reduce latency in result fetching

  • Optimize the Metrics Calculation Pipeline: Profile, refactor, and scale the back-end pipelines that compute product metrics, operation summaries, and route extractions - improving throughput, controlling cost, and strengthening the correctness of derived measures.

  • Develop the Metrics Validation Process: Build and automate validation tooling that cross-checks pipeline outputs against source-of-truth references, flags discrepancies, and gates bad data before it reaches downstream consumers - turning manual triage into a repeatable, alert-driven workflow.

Required Skills:

  • Full-Stack Web Development: Strong proficiency building modern web applications end-to-end - front-end frameworks (e.g., React/TypeScript) and back-end services/APIs (e.g., Python/FastAPI) - with an eye for clean, responsive, data-rich interfaces.

  • Backend & Data Pipeline Development: Solid programming fundamentals (e.g., Python, SQL) and experience designing, building, and maintaining data processing pipelines and the services.

  • Performance & Scalability: Ability to analyze code, system architecture, and data pipelines to improve execution speed and resource efficiency, including caching and pre-aggregation strategies for low-latency data access.

Preferred Skills:

  • Working with Large Datasets: Experience handling and processing high volumes of structured and time-series data, with strong SQL skills and familiarity with relational and/or columnar databases.

  • Big Data Processing: Hands-on experience with distributed processing frameworks such as PySpark for large-scale data pipelines.

  • Domain Exposure: Familiarity with autonomous vehicles, robotics, or other sensor/telemetry-heavy data environments.

$19 - $65 an hour
Our internship hourly rates are a standard pay determined based on the position and your location, year in school, degree, and experience.
Your opportunities joining PlusAI
Work, learn and grow in a highly future-oriented, innovative and dynamic field.
Wide range of opportunities for personal and professional development.
Catered free lunch, unlimited snacks and beverages.
Highly competitive salary and benefits package, including 401(k) plan.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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