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Junior Full Stack Jobs in California (NOW HIRING)

Mill

Senior Full Stack Engineer

San Bruno, CA · On-site

Mentor junior engineers, fostering a culture of continuous learning and improvement. * Conduct code ... on full-stack development * Deep experience with modern frontend frameworks (e.g. React, Vue ...

Mill

Senior Full Stack Engineer

San Bruno, CA · On-site

Mentor junior engineers, fostering a culture of continuous learning and improvement. * Conduct code ... on full-stack development * Deep experience with modern frontend frameworks (e.g. React, Vue ...

Stackruit Ltd.

Full Stack Engineer

San Francisco, CA · On-site

$120 - $150/hr

FuturHealth is searching for a Senior Full-Stack Engineer to join their growing team. You'll ... Foster teamwork and mentor junior engineers. * Help optimize internal development processes. You're ...

VSolvit

SENIOR FULL STACK DEVELOPER

Norco, CA · On-site

Job Summary We are seeking a Senior Full Stack Developer to lead the design, development, and ... NET, PostgreSQL/MS SQL), mentor junior developers, and collaborate with cross-functional teams to ...

Easy Street Capital

Full Stack Developer

Irvine, CA · On-site

$90K - $110K/yr

We are looking for a skilled and motivated Full Stack Developer to join our growing team, building ... Mentor and support junior engineers, contribute to documentation, and design system components.

Abbott

Senior Full Stack Engineer

Alameda, CA

Mentor mid-level and junior engineers through code reviews, pair programming, and technical ... at least 3 years in full-stack roles * Expert-level proficiency in TypeScript with deep ...

Ersilia

Full-Stack Engineer

San Francisco, CA · On-site

$200 - $400/hr

About the Role We're hiring a Full-Stack Engineer to own the product experiences and agent ... Compensation Junior level (3 years experience): $200K Mid to senior level (3-7 years experience ...

Gumloop

Full Stack Software Engineer

San Francisco, CA · On-site

$185K - $250K/yr

Review PRs, share context, and mentor junior engineers to raise the bar across the team What You Bring * 2-5 years of professional experience building products as a full stack developer

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Junior Full Stack information

See California salary details

$23.7K

$87.8K

$135.7K

How much do junior full stack jobs pay per year?

As of Aug 28, 2026, the average yearly pay for junior full stack in California is $87,810.00, according to ZipRecruiter salary data. Most workers in this role earn between $66,100.00 and $85,900.00 per year, depending on experience, location, and employer.

What is a junior full stack developer?

A Junior Full Stack Developer is an entry-level software professional who works on both the front-end and back-end parts of web applications. They are skilled in basic programming languages and frameworks needed for creating user interfaces as well as handling server-side logic and databases. Typically, juniors work under the guidance of more experienced developers, assisting with coding, debugging, and testing tasks while gradually building their expertise. Their role often involves learning and adapting to new technologies as they gain experience in the field.

What are the key skills and qualifications needed to thrive as a junior full stack developer?

To thrive as a Junior Full Stack Developer, you need a solid understanding of both front-end (HTML, CSS, JavaScript) and back-end (Node.js, Python, Java, or similar) programming, typically supported by a relevant degree or coding bootcamp experience. Familiarity with version control systems like Git, databases (SQL/NoSQL), and frameworks such as React or Express is commonly expected. Strong problem-solving abilities, teamwork, and effective communication are standout soft skills in this role. These skills and qualities ensure you can contribute effectively to diverse projects, adapt to evolving technologies, and collaborate within development teams.

How do junior full stack developers typically balance learning new technologies with meeting project deadlines?

As a Junior Full Stack Developer, you’ll often juggle learning new frameworks or languages while contributing to active projects. Many teams support this by pairing juniors with more experienced developers, offering code reviews, and allocating time for professional development within sprint cycles. While deadlines are important, managers usually recognize the learning curve and provide guidance to help you prioritize tasks and grow your skills without being overwhelmed. Open communication with your team about your progress and challenges is key to maintaining this balance.

What is the difference between Junior Full Stack vs Junior Front End Developer?

AspectJunior Full StackJunior Front End Developer
Required SkillsHTML, CSS, JavaScript, basic backend knowledge (Node.js, Python), database basicsHTML, CSS, JavaScript, frameworks like React or Angular, UI/UX design
Work EnvironmentBoth roles often work in collaborative teams within tech companies, startups, or agencies
Common UsageVersatile role involving both client-side and server-side developmentSpecialized role focusing on user interface and experience

Junior Full Stack developers have a broader skill set covering both front-end and back-end development, while Junior Front End Developers focus primarily on the user interface and client-side technologies. The choice depends on your interest in full project development versus specializing in UI/UX design.

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 Junior Full Stack jobs in California?

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

What job categories do people searching Junior Full Stack jobs in California look for?

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

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

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

Junior Full Stack jobs near you
Infographic showing various Junior Full Stack 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, with an average salary of $87,810 per year, or $42.2 per hour.

Senior Full Stack Engineer

San Bruno, CA • On-site

Mill
1 - 10 employees
Learn more about Millexternal

Full-time

Posted 28 days ago

Job description

Mill is a waste prevention technology company reimagining what it means to eliminate waste, starting with food. We build smart systems and infrastructure for homes, businesses, and municipalities that transform food scraps from landfill-bound waste into valuable resources, including chicken feed. Tens of thousands of Mill's residential food recyclers are already helping households divert millions of pounds of food scraps every year, paving the way for our upcoming launch of Mill Commercial—the industry's first end-to-end solution for managing, understanding, and preventing food waste in commercial environments (e.g. grocery, restaurants, food services). At Mill, we are passionate about building easy-to-use, beautifully designed technologies that keep food in the food system and out of landfills.

Job Summary

We are seeking a highly skilled Senior Full Stack Engineer to join our engineering team. This is an individual contributor technical leadership role reporting to the Director of Software Engineering. You will drive the technical direction of your project area and write high-quality code across the stack, while mentoring engineers around you.

We've moved away from a frontend/backend split at Mill: every engineer here works full stack, typically leaning toward one side based on strength and interest, and teams are organized around projects rather than layers of the stack. You'll likely anchor on a given project for a sustained stretch — enough to build real depth and avoid constant context-switching — with real opportunities to rotate onto new projects and parts of the codebase over time.

AI-assisted development is core to how we build software, not a peripheral tool. We expect fluency with tools like Claude Code as part of your daily workflow, and as a senior level engineer, a role in raising the bar for how the team uses them.

Key Responsibilities

Technical Leadership

  1. Lead the technical design and execution of full-stack web applications, ensuring alignment with business objectives and technical standards
  2. Design and implement scalable, secure, and efficient full-stack solutions
  3. Own estimates and technical delivery plans and surface risks early

Development and Implementation

  1. Craft elegant, documented, and sustainable code spanning our full web stack, remaining ready to provide support for our native mobile environment when required
  2. Develop and optimize API and user interfaces
  3. Use AI-assisted development tools fluently as a standard part of how you write, review, and ship code

Team Collaboration

  1. Mentor junior engineers, fostering a culture of continuous learning and improvement.
  2. Conduct code reviews and provide constructive feedback to maintain high coding standards.
  3. Communicate technical constraints and tradeoffs clearly to your project's product manager.

Quality Assurance

  1. Champion best practices in testing, CI/CD, and deployment
  2. Troubleshoot and resolve technical issues, ensuring minimal downtime and disruption
  3. Monitor and optimize application performance
Required Qualifications
  • 5+ years of professional experience in software development with a focus on full-stack development
  • Deep experience with modern frontend frameworks (e.g. React, Vue, Angular, or SvelteKit) — we use SvelteKit at Mill but recognize that strong React/Vue/Angular experience is highly transferable, especially with AI-assisted tooling, so prior SvelteKit experience is preferred but not required
  • Strong backend experience with TypeScript/Node.js; comfort with serverless architectures (e.g. AWS Lambda)
  • Solid understanding of SQL and NoSQL database systems
  • Experience with cloud platforms (we run AWS) and modern deployment workflows
  • Fluency with AI-assisted development workflows (e.g. Claude Code, Copilot) as a genuine part of your day-to-day practice — not occasional or exploratory use
  • Strong software architecture fundamentals (e.g. microservices, serverless)
  • Excellent problem-solving and debugging skills
Preferred Qualifications
  • Experience with our specific stack: SvelteKit (web, deployed on Vercel), React Native (mobile), AWS Lambda with CDK (TypeScript) and Middy
  • Familiarity with DevOps practices and infrastructure as code (e.g. Terraform, CDK)
  • Strong understanding of security best practices in web development
  • Prior experience working at a hardware company, particularly collaborating with firmware teams — we build physical devices, not just software, and comfort working alongside hardware/firmware engineers is a plus
Key Attributes
  • Strong communication and interpersonal skills — especially the ability to partner closely with product without owning the roadmap
  • Comfortable holding technical ownership of a project over a sustained period, while staying energized by the opportunity to rotate onto new problems periodically
  • Proactive, self-driven, and eager to take ownership of projects
  • Passion for mentoring and developing engineering talent

The estimated base salary range for this position is $185k to $210k, which does not include the value of benefits or a potential equity grant. A wide range of factors are considered in making compensation decisions, including but not limited to skill sets, market conditions, experience and training, licensure and certifications, and business and organizational needs.

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