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Full Stack Internship Jobs in California (NOW HIRING)

PlusAI

Full Stack Engineer Intern

Santa Clara, CA · On-site

$19 - $65/hr

Build the Metrics Visualization Hub (Full-Stack): Design and ship an end-to-end web application ... hour Our internship hourly rates are a standard pay determined based on the position and your ...

SAP

SAP iXp Intern - Full-Stack Developer

Palo Alto, CA · On-site

$22 - $29/hr

This is more than an internship, it's the foundation for a career built on connection, creativity, and impact. Position title: SAP iXp Intern - Full-Stack Developer *Location: Palo Alto (Hybrid ...

NimbleRx

Senior Fullstack Engineer

Redwood City, CA · On-site

... full-stack features, from design to implementation and test to release • Mentor junior engineers and interns • Promote best practices and high-quality development techniques • Tackle tough ...

VSolvit

JUNIOR FULL STACK DEVELOPER

Norco, CA · On-site

$25 - $41/hr

Job Summary We are seeking a motivated and detail-oriented Junior Full Stack Developer to join our ... internship/project experience). * 1-2 years of academic, internship, or professional experience ...

Prime Intellect

Internship

San Francisco, CA · On-site

... full-stack system for post-training at frontier scale - from SFT and RL to tool use, agent ... We're looking for exceptional interns who've already built real systems, contributed to open-source ...

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Full Stack Internship information

What types of projects and technologies can I expect to work with during a full stack internship?

As a Full Stack Intern, you'll typically be involved in both front-end and back-end development tasks, often contributing to real-world projects such as website features, web applications, or internal tools. You can expect to work with modern frameworks like React or Angular for the front end and Node.js, Python, or Java for the back end, along with databases like MongoDB or PostgreSQL. Interns often collaborate closely with senior developers and participate in code reviews, agile sprints, and team meetings, gaining practical experience across the software development lifecycle. This hands-on exposure is designed to develop your technical skills and prepare you for a future full-time role.

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 foundational knowledge of front-end and back-end development, proficiency in programming languages like JavaScript, HTML/CSS, and at least one backend language, often demonstrated through coursework or projects. Familiarity with frameworks like React or Angular, databases such as MySQL or MongoDB, and version control systems like Git is typically expected. Strong problem-solving skills, eagerness to learn, and effective communication help interns excel in team-based, fast-paced environments. These skills and qualities are crucial for adapting to diverse tasks and contributing meaningfully to complex software projects.

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 are popular job titles related to Full Stack Internship jobs in California?

For Full Stack Internship jobs in California, the most frequently searched job titles are:

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The top searched job categories for Full Stack Internship jobs in California are:

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

Full Stack Internship jobs near you
Infographic showing various Full Stack Internship job openings in California as of August 2026, with employment types broken down into 92% Full Time, 3% Part Time, 4% Contract, and 1% Nights. Highlights an 85% Physical, 4% Hybrid, and 11% Remote job distribution.

Senior/Staff Full Stack Engineer

Career Renew

San Francisco, CA

$175K - $270K/yr

Full-time

Re-posted 8 days ago

Job description

Career Renew is recruiting for one of its clients a Senior/Staff Full Stack Engineer - this is an onsite role in San Francisco. Salary range: 175-270K USD base plus benefits plus equity.

The scientific decision engine for R&D. Raw data → defensible decisions, faster.

Pharma and biotech R&D often spend weeks, or even months, learning, coding, and troubleshooting discovery analysis pipelines. This slows research and diverts focus from the work that truly matters: discovery.

We change that. Using only natural language from the user, our AI builds custom workflows with full transparency and reproducibility for discovery data (omics and beyond), on-demand and in minutes, not weeks. Discovery researchers across therapeutic areas can instantly align, analyze, interpret, integrate, and iterate hypotheses for complex datasets without manual coding or repetitive setup.

By automating these time-consuming processes, we empower scientists to spend more time designing experiments, testing insights, and driving high-quality discoveries, including novel IP. From accelerating data analysis to uncovering novel targets and biomarkers, we are the Scientific Decision Engine that turns data into actionable breakthroughs.

We're are looking for a Senior/Staff Full Stack Engineer with 4+ YOE to join our Engineering team. We need a builder who is excited to create foundational systems and have meaningful influence on our technology as we work to accelerate drug discovery and improve human health globally. This is a top priority hire driven by our hypergrowth and the need to scale our core product to meet surging enterprise demand.

Responsibilities

  • Build new product features and systems from scratch across frontend and backend, directly expanding Mithril's platform capabilities for world-class researchers

  • Design, build, and own scalable backend services, APIs, and data pipelines that power the Mithril AI platform across the application, identity, data storage, and ML layers

  • Work within fast-moving sprint cycles to ship code quickly, contributing to production within your first few weeks

  • Collaborate with a cross-functional team of engineers, product managers, designers, and AI scientists to translate complex scientific workflows into intuitive, high-performance software

  • Own features end-to-end from early development through production deployment, iteration, and scale — ensuring they deliver real value to researchers at leading pharma and biotech organizations

Requirements:
4+ years of experience in professional full-stack or backend engineering (not including internships) (Mandatory)
Built products at early-stage or high-growth startups, preferably as a founder or early employee (Mandatory)
Experience shipping and owning production systems used by real customers (Mandatory)
Experience designing and working with scalable systems, databases, and data-intensive applications.(Mandatory)
BS in Computer Science, STEM, or related technical skill (Mandatory)
Strong proficiency in modern frameworks, like Python and React (Mandatory)
Experience building backend services and REST APIs, with Django as a plus (Mandatory)
Familiarity with GraphQL and cloud infrastructure, like AWS (Nice-to-have)
Intellectually curious and excited to learn – ask questions and engage deeply with the product and problem space (Mandatory)
Positive and collaborative with the energy to thrive in a high-communication, in-person team culture.(Mandatory)
Demonstrated interest in life sciences, drug discovery, or computational biology (Nice-to-have)
Why candidates should join

Why us?

  • Real impact: Our platform is used daily by world-class researchers at J&J, Roche, Eli Lilly, AstraZeneca, and Siemens compressing months of drug discovery into minutes.

  • Hypergrowth: 12x YoY revenue growth; $0 to $2M in year one, on track to blow past $10M this year — three enterprise deals closed in a single week

  • Strong funding: $XXM Series A (~$100M valuation) led by Obvious Ventures, a deep tech and biotech specialist fund; stealth only share details on call (not written)

  • Proprietary moat: The biological knowledge graph is core IP — integrating global genomic datasets, published research, and proprietary data into a context layer that OpenAI and Anthropic can't replicate overnight


Why this Role?

  • Builder: You're building V1 of a product that enterprise pharma is already paying for — greenfield full stack work with end-to-end ownership from concept to production

  • Career accelerator: Engineering grows from 10 to 30 by EOY and 60–70 the year after — tech lead and manager paths are imminent. Create your own adventure in terms of where you want to take your career

  • Competitive Comp: $175K–$270K base + 0.3–0.6% equity