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Full Stack Intern Jobs in California (NOW HIRING)

Learn our full stack and contribute across frontend, backend, and AI layers * Participate in code reviews, architecture discussions, and product planning What You Bring * Currently pursuing or ...

AI-First Engineering Intern

Los Angeles, CA

$18 - $23.50/hr

Comfort with developing modern full-stack solutions - we care more about how fast you learn than ... For the AI-First Engineering Intern, we will conduct a background check that may include the ...

AI-First Engineering Intern

Los Angeles, CA · On-site

$18 - $23.50/hr

Comfort with developing modern full-stack solutions - we care more about how fast you learn than ... For the AI-First Engineering Intern, we will conduct a background check that may include the ...

Job Summary As aDesign Verification intern, you will ensure the custom IPs powering our chips ... full hardware-software stack. We are looking for Fall '26, Spring '27, and Summer '27 interns. You ...

Electrical Platform Intern

San Jose, CA · On-site

$22.25 - $29.25/hr

Our Platform Team is building the full-stack system that supports Etched Silicon from PCB to Rack. We are seeking interns to work across all aspects of mechanical and electrical engineering to design ...

Mech / Thermal Intern

San Jose, CA · On-site

$22 - $29.50/hr

... full-stack system that supports Etched Silicon from PCB to Rack. We are seeking interns to work across all aspects of mechanical and electrical engineering to design the future of high power ASIC ...

Job Summary As a Design Verification intern, you will ensure the custom IPs powering our chips ... full hardware-software stack. We are looking for Fall '26, Spring '27, and Summer '27 interns. You ...

Mech / Thermal Intern

San Jose, CA · On-site

$22 - $29.50/hr

... full-stack system that supports Etched Silicon from PCB to Rack. We are seeking interns to work across all aspects of mechanical and electrical engineering to design the future of high power ASIC ...

Electrical Platform Intern

San Jose, CA · On-site

$22.25 - $29.25/hr

Our Platform Team is building the full-stack system that supports Etched Silicon from PCB to Rack. We are seeking interns to work across all aspects of mechanical and electrical engineering to design ...

The Role As a Research Intern at Phonic, you'll work directly on the core problems that make Phonic ... stack from audio understanding to audio output, and take full ownership of driving them forward

Full stack experience including both front end and back end is preferred * Statistics analysis experience is preferred Note * The position is rolling-based and can start anytime. * This position is ...

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Showing results 1-20

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:

Software Engineering Intern

Instead

San Francisco, CA • On-site

Internship

Re-posted 9 days ago


Job description

About Instead
Instead is where tax work gets done. Our AI agent orchestrates the entirety of how work gets done in tax, from preparation and compliance to filing and advisory. It's a fundamentally new way of doing tax work, and it's why top 500 firms, Big Four teams, and enterprise corporate tax departments are choosing Instead.
What makes us unique: we hold full government approvals with the IRS, 48 states, and all cities to e-file 1040, 1041, 1120, 1120S, and 1065, with 706, 709, 990, 5500, 2290, and PPT coming for tax year 2026. Instead is a full replacement for CCH Axcess, GoSystem, UltraTax, OneSource, CorpTax, Lacerte, ProConnect, Drake, and more. No other tax startup will be able to offer these capabilities for years as we are two to three years ahead of everyone else in government approvals. This lets us build product experiences that are simply unmatched in the market.
Instead is backed by Conviction, IRIS (the largest tax software provider in the UK), Skylark, Aprio, and many of our partners and customers. Our team includes leaders from Intuit, Gusto, Zenefits, Thomson Reuters, Wolters Kluwer, PwC, BDO, RSM, and KPMG.
The Role
We're looking for Software Engineering Interns to join our San Francisco team and build real features on our AI-powered tax platform. This is not a coffee-fetching internship. You'll ship production code that hundreds of accounting firms use, work alongside senior engineers, and get hands-on experience building with AI tools from day one.
Our stack: Vue, Nuxt, TypeScript, and Tailwind CSS on the frontend. Go, Docker on AWS ECS/Fargate, and PostgreSQL on AWS RDS on the backend. For AI, we use Cursor, Claude Code, Helicone, Gemini, and OpenAI, and we're constantly evaluating new tools.
What You'll Do
  • Ship product features end to end on our live customer platform alongside senior engineers
  • Build and test AI-powered components including inference pipelines and prompt engineering
  • Fix bugs and make product improvements based on real customer feedback
  • Create internal tools that make the engineering team more productive
  • Learn our full stack and contribute across frontend, backend, and AI layers
  • Participate in code reviews, architecture discussions, and product planning
What You Bring
  • Currently pursuing or recently completed a degree in Computer Science, Software Engineering, or a related field
  • Strong programming fundamentals. You can write clean code, debug efficiently, and think about edge cases
  • Familiarity with web development (frontend or backend). Experience with any modern framework counts
  • Curiosity about AI and willingness to learn. Experience with AI coding tools (Cursor, Claude Code, GitHub Copilot) is a plus
  • High attention to detail and a bias for shipping
  • Ability to work on-site in San Francisco
What Makes Someone Exceptional
  • You've built and shipped side projects or open-source contributions that demonstrate your ability to go from idea to working product
  • You already use AI tools in your coding workflow and understand how they change the way software gets built
  • You learn fast and don't wait to be told what to do. When you see something broken, you fix it
  • You care about the end user, not just the code. You want to understand why something matters before you build it
  • You're excited about working at a startup where your work ships to real customers on day one
Location
San Francisco (on-site)
Instead is an equal opportunity employer. We evaluate candidates based on capability, judgment, ownership, and fit for the role's responsibilities. We welcome candidates who can help us build a category-defining company in tax technology.