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Sr Fullstack Developer Jobs in California (NOW HIRING)

Kunya AI

Senior Fullstack Engineer

San Francisco, CA · On-site

$220 - $280/hr

Senior Fullstack Engineer** who can build fast, think clearly, and own meaningful parts of the product from idea to production.This role is based in **San Francisco** with a **hybrid** setup. You'll ...

iSpace, Inc.

Sr. Fullstack Developer

Glendale, CA · Remote

Senior Full-Stack Developer Location: Fully remote Duration: 12+ months Description: Seeking a Full Stack Developer that can architect and develop large scale enterprise applications using React.js ...

iSpace, Inc.

Sr. Fullstack Developer

Glendale, CA · On-site +1

Senior Full-Stack Developer Location: Fully remote Duration: 12+ months Description: Seeking a Full Stack Developer that can architect and develop large scale enterprise applications using React.js ...

Bobyard

Senior Fullstack Engineer

San Francisco, CA · On-site

Bobyard is building modern software for construction, and they are seeking a Senior Fullstack Engineer to lead their React architecture and enhance the user interface. The role involves full-stack ...

Bobyard, Inc

Senior Fullstack Engineer

San Francisco, CA · On-site

$150K - $195K/yr

As our fullstack engineer and user base grow, we need a senior engineer to own our React architecture and raise the UI bar. You'll lead fullstack development across the product - architecture ...

Zendesk

Senior Fullstack Engineer, Solve

San Francisco, CA · On-site

$144K - $190K/yr

We're seeking a Senior Fullstack Engineer to help build Solve - an AI-powered conversation engine that resolves customer issues across channels. You'll deliver end-to-end features spanning LLM ...

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Sr Fullstack Developer information

What is a Sr Fullstack Developer?

A Sr Fullstack Developer is an experienced software engineer who is proficient in both frontend and backend development. They work with a variety of programming languages, frameworks, and databases to build fully functional web applications. In addition to coding, senior fullstack developers often lead projects, mentor junior developers, and help make architectural decisions. Their broad skill set allows them to handle tasks across the entire technology stack, ensuring that applications are efficient, scalable, and user-friendly.

What are some typical challenges a Sr Fullstack Developer faces when balancing front-end and back-end responsibilities?

Sr Fullstack Developers often need to juggle tasks across both the front-end and back-end, which can be challenging when priorities shift quickly or deadlines are tight. Balancing deep technical knowledge in multiple frameworks and languages while ensuring seamless integration requires strong organizational skills and effective communication with both UI/UX designers and backend engineers. Additionally, staying updated with evolving technologies on both ends is crucial, so time management and continuous learning are key to success in this role.

What are the key skills and qualifications needed to thrive as a Sr Fullstack Developer, and why are they important?

To thrive as a Sr Fullstack Developer, you need advanced proficiency in both front-end and back-end programming languages, frameworks, and a solid understanding of software architecture, typically supported by a computer science degree or equivalent experience. Familiarity with tools such as Git, Docker, CI/CD pipelines, cloud platforms, and relevant certifications like AWS Certified Developer or similar are often expected. Strong problem-solving abilities, effective communication, and a collaborative mindset are vital soft skills for this role. These competencies enable developers to deliver robust, scalable solutions and effectively drive projects to completion in dynamic team environments.

What is the difference between Sr Fullstack Developer vs Backend Developer?

AspectSr Fullstack DeveloperBackend Developer
Required SkillsProficiency in both frontend (JavaScript, HTML, CSS) and backend (Node.js, Python, Java)Specialized in server-side languages and database management
Work EnvironmentWorks on both client-facing and server-side componentsFocuses primarily on backend systems and APIs
Common UsageUsed across full product development teamsPrimarily in backend-focused roles within development teams

The main difference between a Sr Fullstack Developer and a Backend Developer is the scope of expertise. A Sr Fullstack Developer handles both frontend and backend tasks, while a Backend Developer specializes in server-side development. Both roles require strong programming skills, but the Fullstack role demands broader knowledge across the entire application stack.

What are popular job titles related to Sr Fullstack Developer jobs in California?

For Sr Fullstack Developer jobs in California, the most frequently searched job titles are:

What job categories do people searching Sr Fullstack Developer jobs in California look for?

The top searched job categories for Sr Fullstack Developer jobs in California are:

What cities in California are hiring for Sr Fullstack Developer jobs?

Cities in California with the most Sr Fullstack Developer job openings:

Sr Fullstack Developer jobs near you
Infographic showing various Sr Fullstack Developer job openings in California as of August 2026, with employment types broken down into 1% As Needed, 87% Full Time, 6% Part Time, 2% Temporary, and 4% Contract. Highlights an 84% Physical, 6% Hybrid, and 10% Remote job distribution.

Senior Fullstack Developer (React.js / Node.js)

Cortes 23

San Francisco, CA • On-site

$120 - $180/hr

Other

This job post has expired today. Applications are no longer accepted.

Job description

Senior Fullstack Developer (React.js / Node.js) — Chicago

Talent has no borders. Proxify's mission is to connect top developers around the world with opportunities they deserve. So, it doesn't matter where you are; we are here to help you fast-track your independent career in the right direction.

Since our launch, Proxify's developers have successfully worked with 1200+ happy clients to build their products and growth features. 5000+ talented developers trust Proxify and its network to fulfill their dreams and objectives.

Proxify is shaped by a global network of supportive, talented developers interested in remote full-time jobs. Our Glassdoor (4.5/5) and Trustpilot (4.8/5) ratings reflect the trust developers place in us and our commitment to our members' success.

The Role:

We are looking for a Senior Fullstack Developer skilled in React.js and Node.js for one of our clients. You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products.

What we are looking for:

  • 5+ years of experience as a Fullstack Developer.

Backend experience with:

  • Node.js

Database experience with:

  • SQL
  • MongoDB
  • Intermediate-advanced English
  • Located in CET timezone (+/- 3 hours), we are unable to consider applications from candidates in other time zones.

Nice-to-have:

  • Database Architecture knowledge.

Responsibilities:

  • Ability to build libraries and frameworks of reusable efficient code.
  • Competence in designing and implementing low-latency, stable and performing applications.
  • Capacity to effectively collaborate with other team members and stakeholders remotely.
  • Ability to implement data protection systems.
  • Competence in data storage solutions.
What we offer:

Get paid, not played

No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.

Predictable project hours

Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.

Flex days, so you can recharge

Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.

Career-accelerating positions at cutting-edge companies

Discover exclusive long-term remote positions at the world's most exciting companies.

Hand-picked opportunities, just for you

Skip the typical recruitment roadblocks and biases with personally matched positions.

One seamless process, multiple opportunities

A one-time contracting process for endless opportunities, with no extra assessments.

Compensation

Enjoy the same pay, every month with positions landed through Proxify.

Helping travelers find remote work and build location-independent careers around the world.

Helping travelers find remote work and build location-independent careers around the world.

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