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Full Stack Intern Jobs in California (NOW HIRING)

Gumloop

Design Engineer Intern

San Francisco, CA · On-site

What we're working on - Changelog Role Overview We're looking for a Design Engineering Intern to ... Any full-stack exposure, especially enough backend fluency to unblock your own product work.

Clerkie

Software Engineer Internship

Los Angeles, CA · On-site +1

$80/hr

About the internship As the newest addition to Team Clerkie, this Software Engineer Intern will ... You'll work across the full stack, collaborating with engineers on frontend, backend, and ...

Clerkie

Software Engineer Internship

San Francisco, CA · On-site +1

$80/hr

About the internship As the newest addition to Team Clerkie, this Software Engineer Intern will ... You'll work across the full stack, collaborating with engineers on frontend, backend, and ...

Gallo

IT Software Developer Internship 2027

Modesto, CA · On-site +1

$26.50 - $28.50/hr

As an IT Software Developer Intern, you'll contribute to meaningful work across web, mobile, cloud ... You'll develop full-stack code, debug and test applications, work with databases and cloud services ...

Phonely Ltd

Software Engineer Intern

San Francisco, CA · On-site

Exposure to full-stack development through projects, coursework, or internships * Strong communication skills and ability to work directly with customers and teammates * Eagerness to learn quickly in ...

Gallo

IT Software Developer Internship 2027

Modesto, CA · On-site +1

$26.50 - $28.50/hr

As an IT Software Developer Intern, you'll contribute to meaningful work across web, mobile, cloud ... You'll develop full-stack code, debug and test applications, work with databases and cloud services ...

Prime Intellect

Internship

San Francisco, CA · On-site

Our platform, Lab, unifies compute, environments, evaluations, secure sandboxes, high-performance training, and deployment into one full-stack system for post-training at frontier scale - from SFT ...

Bland

Machine Learning Intern

San Francisco, CA · On-site

... voice stack: speech-to-text, large language models, neural audio codecs, or text-to-speech. You ... Full-duplex conversation and turn-taking dynamics What Makes You a Great Fit Research foundations

Pylon Labs

Software Engineer, Intern

San Francisco, CA · On-site

... full-stack fundamentals * (Bonus) You have interned at high-growth startups and can navigate ambiguous environments. * (Bonus) You highly leverage AI for software development and can juggle multiple ...

PsiQuantum

Intern, Quantum Architecture

Brisbane, CA · On-site +1

$27.50/hr

As an intern you will work with our quantum architecture team to contribute to the development of a full-stack quantum computing architecture. Topics can include theory and modelling of linear ...

PsiQuantum

Intern, Quantum Architecture

Palo Alto, CA · On-site

$27.50/hr

As an intern you will work with our quantum architecture team to contribute to the development of a full-stack quantum computing architecture. Topics can include theory and modelling of linear ...

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All JobsFull Stack Intern JobsFull Stack Intern Jobs in California

Full Stack Intern information

What does a full stack intern do?

A Full Stack Intern assists in developing both the front-end and back-end components of web applications. Their responsibilities typically include writing code, debugging issues, collaborating with team members, and learning to work with various programming languages and frameworks. They gain hands-on experience with databases, servers, APIs, and user interfaces, contributing to the full software development lifecycle. The role is designed to help interns learn industry best practices and prepare for a career as a full stack developer.

What are the key skills and qualifications needed to thrive as a full stack intern, and why are they important?

To thrive as a Full Stack Intern, you need a solid understanding of both front-end (HTML, CSS, JavaScript) and back-end (such as Node.js, Python, or Java) development, often demonstrated through coursework or personal projects. Familiarity with frameworks like React or Angular, version control systems like Git, and exposure to databases are typically expected. Strong problem-solving skills, eagerness to learn, and effective teamwork make candidates stand out in this role. These skills and qualities are vital for efficiently contributing to real-world software projects and adapting quickly within dynamic development teams.

What are some typical projects and responsibilities for a full stack intern during their internship?

As a Full Stack Intern, you can expect to work on a variety of projects that span both front-end and back-end development. Typical responsibilities may include building user interfaces, developing APIs, troubleshooting bugs, and collaborating with senior developers to deploy features. Interns often participate in daily stand-ups, code reviews, and may be assigned to a specific product or feature team. This hands-on experience helps interns understand the complete software development lifecycle and develop skills in both client-side and server-side technologies.

What are the most commonly searched types of Full Stack jobs in California?

The most popular types of Full Stack jobs in California are:

What cities in California are hiring for Full Stack Intern jobs?

Cities in California with the most Full Stack Intern job openings:

Full Stack Intern jobs near you
Infographic showing various Full Stack Intern job openings in California as of August 2026, with employment types broken down into 83% Full Time, 10% Part Time, 6% Contract, and 1% Nights. Highlights an 83% Physical, 4% Hybrid, and 13% Remote job distribution.

Design Engineer Intern

Gumloop

San Francisco, CA • On-site

Full-time

Retirement, PTO

Re-posted 2 days ago

Job description

About Us
Gumloop is the piece of AI infrastructure companies roll out to let everyone build agents securely. Let people who understand the problem build and share agents, manage their access to data, choose your AI models and host it all in your own cloud.
We're a small team building as fast as humanly possible. Gusto, Ramp, Shopify, Samsara, Instacart, and Opendoor are running agents on Gumloop across their company. We've raised over $70M from Benchmark, First Round Capital, Y Combinator, Nexus Ventures to scale and are looking for people who care as much as we do to join the team.
Here's what life at Gumloop is like:
  • Our beliefs - The Handbook
  • Our adventures - Wall of Photos
  • What we're working on - Changelog

Role Overview
We're looking for a Design Engineering Intern to help shape, design, and build high-craft product experiences end to end.
This role sits at the intersection of product, design, and engineering. You'll contribute to key user-facing surfaces from early concept through final implementation, developing your product judgment, interaction design instincts, and frontend skills while working on problems that matter.
The ideal candidate is curious, high-ownership, and comfortable operating with some ambiguity. You don't need to have done this before at scale, but you should be able to take a product problem, reason through the UX, and start building. You'll also contribute to our design system and help establish reusable patterns that make the product better over time.
This is a high-impact internship for someone who wants real influence over what we build, how it works, and how it feels. You won't be doing busywork.
What You'll Do
  • Design and build polished, user-facing product experiences across core surfaces of the product.
  • Contribute to features end to end, from UX exploration through implementation and iteration, with guidance from the team.
  • Use layout, interaction design, and motion to make powerful workflows feel intuitive and fast.
  • Contribute to our design system, component library, and frontend patterns.
  • Work closely with product, design, and engineering to turn ambiguous ideas into simple, high-quality experiences.
  • Bring care and craft to the details: accessibility, performance, reliability, and edge cases.
What You Bring
  • Currently in your final year of study in design, computer science, or a related field.
  • Hands-on experience with TypeScript, React, and modern frontend development, through coursework, personal projects, or prior internships.
  • Some exposure to design systems, component libraries, or reusable frontend patterns.
  • Strong product intuition and an ability to make thoughtful UX decisions, even with limited guidance.
  • A portfolio or work samples that demonstrate both design sensibility and frontend execution.
  • Care for craft beyond the obvious: you sweat the details others miss.
Bonus Points
  • Experience with Tailwind CSS, Next.js, TanStack Query, or similar modern frontend tooling.
  • Familiarity with Figma or other design tools for exploring and communicating ideas.
  • Interest in developer tools, technical products, or AI-native products.
  • Any full-stack exposure, especially enough backend fluency to unblock your own product work.
Benefits
  • Highly competitive salary and meaningful equity
  • Generous paid time off: 24 days for SF employees and 20 days globally, use them as you need
  • $350/month wellness benefit to spend on gym, spa, equipment, or whatever keeps you at your best
  • 15 days of temporary remote work flexibility per year
  • 401k match up to 6%

Apply