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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 ...

Info Way Solutions

Fullstack developer

Fremont, CA · On-site

Info Way Solutions is seeking a Senior Fullstack Engineer to join a global online Payment leader's team. The role involves building low-latency, high-throughput mid-tier applications and requires ...

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 ...

Saviance

Sr Fullstack Developer

San Francisco, CA · On-site

Saviance is seeking a Sr. Full Stack Developer to build and manage EdCast applications for digital workspace platforms. The role involves designing, implementing, and ensuring scalability of ...

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, 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 ...

Zendesk

Senior Fullstack Engineer, Solve

San Francisco, CA

$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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All JobsSr Fullstack Developer JobsSr Fullstack Developer Jobs in California

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 86% Full Time, 9% Part Time, and 5% Contract. Highlights an 82% Physical, 6% Hybrid, and 12% Remote job distribution.

Senior Fullstack Engineer

Kunya AI

San Francisco, CA • On-site

$220 - $280/hr

Other

Re-posted 2 days ago

Job description

# Senior Fullstack EngineerFull-timeSan Francisco, CA · Hybrid$220,000–$280,000/yr## About the role### RoleKunya is building an all-in-one AI platform: chat, images, video, voice, workspaces, and agents. We’re looking for a **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 work closely with a small team building AI-native software for people who want more leverage, more speed, and better tools.### What you'll do* Build and ship high-impact features across frontend, backend, APIs, and internal systems* Work closely with product and design to create intuitive experiences around powerful AI capabilities* Improve performance, quality, and reliability in core user journeys* Help design systems that support rapid product iteration without collapsing under complexity* Contribute across chat, media, voice, workspace, and agent-oriented product areas* Help raise the engineering bar through strong execution and technical judgment### Why this role mattersWe believe AI should expand human agency, not shrink it. That only happens if the product is genuinely useful, fast, and well-built. This role is central to making that real.### How we work* Small team, high trust* Serious ownership* Fast shipping with strong judgment* Hybrid collaboration in San Francisco## What we're looking for### What we're looking for* 5+ years of experience building and shipping production software* Strong fullstack experience across modern frontend applications and backend services* Strong product instincts and ability to work from first principles* Experience with APIs, databases, production debugging, and system design* Ability to thrive in ambiguity and turn rough direction into shipped outcomes* Strong communication and collaborative habits### You may be a fit if you* Want to own real product surfaces, not just tickets* Move quickly without sacrificing thinking* Care about product, users, and technical quality equally* Want to build in a high-agency environment with a small team### Nice to have* Experience with AI infrastructure, media systems, or agent workflows* Startup experience* Experience mentoring engineers or shaping engineering culture## Benefits & perks### What you get* Competitive salary* Equity upside* Hybrid work setup in San Francisco* High ownership and direct product impact* A small team working on meaningful AI product problems### What this is not* A heavily layered org* A ticket factory* A place where good ideas wait for permission## Other open roles### Senior Fullstack EngineerEngineeringFull-timeRemote (Global) · Remote$220,000–$280,000/yrView role### Senior Fullstack EngineerEngineeringFull-timeSingapore · Hybrid$220,000–$280,000/yrView role### Senior Fullstack EngineerEngineeringFull-timeWarsaw, Poland · Hybrid$220,000–$280,000/yrView role### Apply for this roleTakes about 2 minutes. Resume optional but recommended. #J-18808-Ljbffr

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