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Full Stack Software Engineer Intern Jobs in Sunnyvale, CA

Zyphra

Full-Stack Software Engineer

San Francisco, CA · On-site

As a Full-Stack Software Engineer , you will be a core contributor to Zyphra's Agentic Systems and Interaction projects. You will be at the forefront of building a next-generation desktop and browser ...

Blockstream

Full-Stack Software Engineer

Menlo Park, CA · On-site

... user software and hardware wallets like Green and Jade. Our brand stands for innovation in the ... full stack applications * Web front ends * HTTP APIs * SQL and DB backends * System programming ...

Medra

Full Stack Software Engineer

San Francisco, CA · On-site

$170K - $210K/yr

... build software that makes their work easier and faster * Shape the engineering culture and ... years of full-stack engineering experience at product-driven companies * Practical experience ...

Veryfi

Full-Stack Software Engineer

San Mateo, CA · On-site

Veryfi is seeking a Full-Stack Software Engineer to work on the Veryfi APIs and Portal. The role involves coding and architecting solutions, with opportunities to work on cutting-edge AI projects.

quadric, Inc

Full-Stack Software Engineer

Burlingame, CA · On-site

$110K - $270K/yr

Quadric's co-optimized software and hardware is targeted to run neural network (NN) inference ... Role The Full-Stack Engineer is key to making the Quadric product and toolchain easily accessible ...

quadric, Inc

Full-Stack Software Engineer

Burlingame, CA · On-site

$110K - $270K/yr

Quadric's co-optimized software and hardware is targeted to run neural network (NN) inference ... Role The Full-Stack Engineer is key to making the Quadric product and toolchain easily accessible ...

quadric, Inc

Full-Stack Software Engineer

Burlingame, CA · On-site

$110K - $270K/yr

Quadric's co-optimized software and hardware is targeted to run neural network (NN) inference ... Role The Full-Stack Engineer is key to making the Quadric product and toolchain easily accessible ...

Doxel

Full Stack Software Engineer

San Francisco, CA · On-site

$150K - $165K/yr

... modern software teams rely on. Without real-time observability, issues are detected too late ... with modern full-stack frameworks (e.g., Nuxt.js, Next.js, , or similar) * Strong engineering ...

Gumloop

Full Stack Software Engineer

San Francisco, CA · On-site

$185K - $250K/yr

What we're working on - Changelog Role Overview We're looking for an experienced Full Stack Engineer to ship product at the highest level. You'll own features end-to-end - design, build, test, deploy ...

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Showing results 41-60

All JobsFull Stack Software Engineer Intern JobsFull Stack Software Engineer Intern Jobs in Sunnyvale, CA

Full Stack Software Engineer Intern information

See Sunnyvale, CA salary details

$52.2K

$158.2K

$223.6K

How much do full stack software engineer intern jobs pay per year?

As of Sep 2, 2026, the average yearly pay for full stack software engineer intern in Sunnyvale, CA is $158,174.00, according to ZipRecruiter salary data. Most workers in this role earn between $130,300.00 and $185,400.00 per year, depending on experience, location, and employer.

What does a full stack software engineer intern do?

A Full Stack Software Engineer Intern assists with the development of both the front-end and back-end components of web applications. They work under the guidance of experienced engineers to write code, debug issues, and help integrate different technologies across the software stack. Typical tasks include building user interfaces, connecting to databases, and testing new features. This role helps interns gain hands-on experience with various programming languages, frameworks, and tools commonly used in software development.

What are the key skills and qualifications needed to thrive as a full stack software engineer intern?

To thrive as a Full Stack Software Engineer Intern, you need a solid understanding of programming languages (such as JavaScript, Python, or Java), basic web development concepts, and enrollment in a relevant degree program like computer science. Familiarity with frameworks (like React or Node.js), version control systems (such as Git), and cloud platforms are often expected. Strong problem-solving abilities, eagerness to learn, and effective teamwork set standout interns apart. These skills and qualities enable interns to contribute meaningfully to projects, adapt quickly to new technologies, and collaborate efficiently in dynamic development environments.

What types of projects and technologies do full stack software engineer interns typically work on during their internship?

Full Stack Software Engineer Interns often work on a variety of projects that span both front-end and back-end development. This may include building user interfaces with frameworks like React or Angular, developing APIs using Node.js or Python, and working with databases such as MongoDB or PostgreSQL. Interns usually collaborate closely with senior engineers, designers, and product managers, gaining exposure to the full software development lifecycle. The work environment tends to be fast-paced and collaborative, offering valuable opportunities to learn modern development practices and tools.

What is the difference between Full Stack Software Engineer Intern vs Software Developer Intern?

AspectFull Stack Software Engineer InternSoftware Developer Intern
Required SkillsKnowledge of both front-end and back-end technologies, basic understanding of databasesFocus on specific programming languages or platforms, such as Java, Python, or mobile development
Work EnvironmentCollaborates on full application development, often in agile teamsWorks on specific modules or features, may focus on front-end or back-end
Industry UsageCommon in tech companies, startups, and software firmsWidely used across various tech sectors, including web and mobile app development

In summary, a Full Stack Software Engineer Intern has a broader scope, working on both front-end and back-end development, while a Software Developer Intern may focus on a specific area. Both roles provide valuable experience in software development but differ in technical breadth and project involvement.

What are popular job titles related to Full Stack Software Engineer Intern jobs in Sunnyvale, CA?

For Full Stack Software Engineer Intern jobs in Sunnyvale, CA, the most frequently searched job titles are:

What job categories do people searching Full Stack Software Engineer Intern jobs in Sunnyvale, CA look for?

The top searched job categories for Full Stack Software Engineer Intern jobs in Sunnyvale, CA are:

What cities near Sunnyvale, CA are hiring for Full Stack Software Engineer Intern jobs?

Cities near Sunnyvale, CA with the most Full Stack Software Engineer Intern job openings:

Full Stack Software Engineer Intern jobs near you
Infographic showing various Full Stack Software Engineer Intern job openings in Sunnyvale, CA as of August 2026, with employment types broken down into 1% As Needed, 81% Full Time, 15% Part Time, and 3% Contract. Highlights an 88% Physical, 4% Hybrid, and 8% Remote job distribution, with an average salary of $158,174 per year, or $76 per hour.

Full-Stack Software Engineer

Zyphra

San Francisco, CA • On-site

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 19 days ago

Job description

Zyphra is an artificial intelligence company based in San Francisco, California. The Role:

As a Full-Stack Software Engineer, you will be a core contributor to Zyphra’s Agentic Systems and Interaction projects. You will be at the forefront of building a next-generation desktop and browser-based agent (end-to-end) that can autonomously navigate the web, interact with filesystems, and complete complex user tasks. This role spans agentic orchestration, frontend interfaces, secure sandboxing environments, large-scale document search and retrieval, and language/vision model integration.

You’ll Work Across:

  • Design and implementation of different agentic system designs capable of interacting with browsers, operating systems, enterprise filesystems, collaboration tools, etc.

  • Building search and retrieval pipelines across large-scale structured and unstructured data

  • Build the backend layer for RAG systems and other information context management systems required for agents to operate

  • Integrating LLMs, vision models, reinforcement learning, and scaffolding frameworks for autonomous, multi-step decision-making

  • What matters most is your drive to build production-grade software

  • We value velocity and curiosity, especially in fast-moving and ambiguous environments

What We're Looking For / Requirements:

  • Proficiency in Python and a deep understanding of building and debugging complex end-to-end applications

  • Experience working with SaaS environment and production workloads, web interfaces, databases, search engines, and queuing systems

  • Experience developing browser extensions or automation tools with fine-grained control over the browser (mouse, tabs, DOM)

  • Understanding of LLMs, prompting techniques, and orchestration frameworks for multi-step reasoning

  • Ability to work across the whole stack from web interfaces to control plane and data infrastructure like queuing systems, databases, and search indexes

  • Experience designing or working with secure and virtualized execution environments

  • Excellent communication and collaboration skills across product, research, and engineering teams

Qualifications / Additional Skills:

  • Experience building or integrating retrieval-augmented generation (RAG) systems

  • Experience working with enterprise security and compliance frameworks (i.e., SOC 2, GDPR, etc.)

  • Familiarity with embeddings, vector databases and large-scale document indexing

  • Knowledge of web automation tools and headless browser environments (i.e., Puppeteer, Playwright)

  • Understanding of sandboxed or containerized compute environments with strict access controls

  • Comfort designing user-facing agentic workflows and reasoning systems that span multiple modalities (text, vision, actions)

  • Experience using and fine-tuning models for screen reading, OCR, or UI understanding

  • Background in HCI or interest in building intuitive agent interfaces that extend human capabilities

  • Machine Learning experience as a double bonus

Why Work at Zyphra:

  • Our research methodology is grounded in methodical, step-by-step approaches to ambitious goals. Both deep research and engineering excellence are equally valued

  • We strongly value new and crazy ideas and are very willing to bet big on new ideas

  • We move as quickly as we can; we aim to minimize the bar to impact as low as possible

  • We all enjoy what we do and love discussing AI

Benefits and Perks:

  • Comprehensive medical, dental, vision, and FSA plans

  • Competitive compensation and 401(k) plan

  • Relocation and immigration support on a case-by-case basis

  • In-office snacks and meals provided

  • Unlimited PTO and company holidays

  • In-person team in San Francisco with a collaborative, high-energy environment