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Sr Frontend Developer Jobs in California (NOW HIRING)

MrBeast

Senior Frontend Engineer

San Mateo, CA · Hybrid

$139K - $191K/yr

Senior Frontend Engineer Primary: Bay Area (San Francisco / Peninsula) | Secondary: NYC The Opportunity We're doing an AI-first engineering rebuild for a company that already has an audience of 100M ...

Prosum

Senior Front-End Engineer

Glendale, CA · On-site

$129K - $178K/yr

Company Description Sr. Front-End Engineer We are looking for a passionate engineer who wants to shape the next generation of video consumption applications on the Web. We're a casual shop that ...

Career Launch

Senior Frontend Engineer

San Francisco, CA · On-site

$150 - $210/hr

THE ROLE As a Senior Frontend Engineer, you may work on projects that require strong execution, communication, analytical judgment, and the ability to move quickly in ambiguous environments. This ...

Mochi Health

Senior Front-End Engineer

San Francisco, CA · On-site

$144K - $198K/yr

They are seeking a Senior Front-End Engineer to lead the development of user interfaces that enhance patient and provider interactions, ensuring a responsive and reliable experience in managing ...

Prosum

Senior Front-End Engineer

Glendale, CA

$129K - $178K/yr

Sr. Front-End Engineer We are looking for a passionate engineer who wants to shape the next generation of video consumption applications on the Web. We're a casual shop that values passion, community ...

Mochi Health

Senior Front-End Engineer

San Francisco, CA · On-site

$144K - $198K/yr

They are seeking a Senior Front-End Engineer to develop and optimize user interfaces that enhance patient and provider interactions, ensuring a seamless experience in their AI-driven healthcare ...

Halliday

Senior Frontend Engineer

San Francisco, CA · On-site

$144K - $198K/yr

They are seeking a Senior Frontend Engineer to build consumer-facing crypto and payments products ... and developer tools. • Contribute to Halliday's public SDKs and APIs, making it easy for ...

Giga AI Inc

Senior Frontend Engineer

San Francisco, CA · On-site

$200K - $280K/yr

Develop yourself alongside top-tier engineers and founders More About the Role We're seeking a seasoned Senior Frontend Engineer with deep prior experience with building functional & visually ...

Halliday

Senior Frontend Engineer

San Francisco, CA · On-site

$144K - $198K/yr

They are seeking a Senior Frontend Engineer with expertise in React and TypeScript to build ... and developer tools. • Ship Developer Tools: Contribute to Halliday's public SDKs and APIs ...

Worky

Senior Frontend Software Engineer

Sacramento, CA · On-site

$105 - $145/hr

The Senior Frontend Engineer plays a key role in defining frontend standards, driving best practices, and elevating the overall engineering culture. JOB RESPONSIBILITIES Essential Job ...

Kikoff

Senior Frontend Engineer

San Francisco, CA

$144K - $198K/yr

The Role: We're looking for a Senior Frontend Engineer to help shape the future of our flagship credit building product - the engine behind our mission to help millions of Americans build and ...

eTeam, Inc.

Senior Front End Web Developer

San Jose, CA · On-site

Senior Front End Web Developer Role Requirements & Qualifications * Experience: 8-10 years of professional experience in front-end development (for senior roles). * Technical Skills: Expert-level ...

New

Gallatin AI, Inc.

Senior Front-End Engineer

El Segundo, CA · On-site

$130K - $179K/yr

As a Senior Front-End Engineer, you will develop reusable UI components and ensure a high-quality ... DevOps workflows • Contributions to open-source projects Company : Gallatin is building a ...

Gallatin AI, Inc.

Senior Front-End Engineer

Palo Alto, CA · On-site

$144K - $198K/yr

They are seeking a Senior Front-End Engineer to develop self-contained, reusable components and ... DevOps workflows • Contributions to open-source projects Company : Gallatin is building a ...

Gallatin AI, Inc.

Senior Front-End Engineer

El Segundo, CA · On-site

$130K - $179K/yr

They are seeking a Senior Front-End Engineer to craft reusable UI components and improve user ... DevOps workflows • Contributions to open-source projects Company : Gallatin is building a ...

Gallatin AI, Inc.

Senior Front-End Engineer

San Francisco, CA · On-site

$144K - $198K/yr

As a Senior Front-End Engineer, you will develop reusable UI components, enhance user experience ... DevOps workflows • Contributions to open-source projects Company : Gallatin is building a ...

Finix

Senior Frontend Engineer

San Francisco, CA

$160K - $235K/yr

... Senior Frontend Engineer on our Frontend Engineering Team, you'll architect and build the core payment experiences that power thousands of businesses. You'll develop our comprehensive payments ...

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All JobsSr Frontend Developer JobsSr Frontend Developer Jobs in California

Sr Frontend Developer information

What is a Sr Frontend Developer?

Sr Frontend Developers are experienced software engineers who specialize in building and optimizing the user interfaces of web applications. They are responsible for translating design mockups into interactive, responsive, and accessible web pages using technologies like HTML, CSS, and JavaScript frameworks (such as React, Angular, or Vue). In addition to coding, Sr Frontend Developers often lead technical decisions, mentor junior developers, and collaborate closely with designers and backend engineers to deliver high-quality user experiences. Their expertise ensures that web applications are visually appealing, performant, and user-friendly.

What are the key skills and qualifications needed to thrive as a Sr Frontend Developer?

To thrive as a Sr Frontend Developer, you need deep expertise in HTML, CSS, JavaScript, and modern front-end frameworks like React or Angular, usually backed by a degree in computer science or equivalent experience. Advanced knowledge of tools such as Git, Webpack, RESTful APIs, and proficiency with testing frameworks is typically required. Outstanding problem-solving abilities, strong collaboration, and effective communication set top performers apart in this role. These skills ensure the delivery of high-quality, user-friendly interfaces and seamless teamwork in fast-paced development environments.

What are some common challenges faced by Sr Frontend Developers when working on cross-functional teams?

Sr Frontend Developers often collaborate closely with backend engineers, UX/UI designers, and product managers. A common challenge in these environments is ensuring clear communication of technical requirements and design expectations to avoid misunderstandings that can lead to rework. Balancing user experience with technical feasibility is another frequent hurdle, especially when negotiating priorities between design vision and performance constraints. Effective Sr Frontend Developers proactively bridge gaps through strong documentation, regular alignment meetings, and by advocating for best practices in both development and design.

What is the difference between Sr Frontend Developer vs Frontend Developer?

AspectSr Frontend DeveloperFrontend Developer
Required ExperienceTypically 5+ years, leadership skills1-3 years, entry to mid-level
ResponsibilitiesAdvanced coding, mentoring, project leadershipImplementing UI features, bug fixes
Skills & CertificationsExpertise in JavaScript, frameworks, leadershipHTML, CSS, JavaScript basics
Work EnvironmentSenior roles in teams, project planningDevelopment teams, collaborative projects

The main difference between a Sr Frontend Developer and a Frontend Developer lies in experience, responsibilities, and leadership. Senior developers handle complex tasks, mentor others, and lead projects, while frontend developers focus on implementing features and fixing bugs. Both roles require strong JavaScript, HTML, and CSS skills, but senior roles demand more experience and strategic input.

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

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

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

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

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

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

Sr Frontend Developer jobs near you
Infographic showing various Sr Frontend Developer job openings in California as of August 2026, with employment types broken down into 1% As Needed, 93% Full Time, 2% Part Time, and 4% Contract. Highlights an 83% Physical, 6% Hybrid, and 11% Remote job distribution.

Senior Frontend Engineer

MrBeast

San Mateo, CA • Hybrid

$139K - $191K/yr

Full-time

Re-posted 5 days ago

Job description

Senior Frontend Engineer

Primary: Bay Area (San Francisco / Peninsula)   |   Secondary: NYC

The Opportunity

We're doing an AI-first engineering rebuild for a company that already has an audience of 100M+ people. This is a zero-to-one build with no legacy constraints, so you get to define a modern frontend stack from scratch instead of inheriting a tangle of old code. You're here to build customer-facing experiences that millions of people actually use.

The Product

You'll design, build, and evolve the user-facing applications at the center of the MrBeast membership ecosystem. The work is fast and AI-first, in close partnership with product and design. That means:

  • Build scalable, performant frontend architectures and reusable components for consumer apps with the potential to reach 100M+ people.
  • Make core user journeys fast: page-load times and frontend latency are numbers you own and move.
  • Use AI coding agents and modern tooling as the baseline for how you ship, not the exception.

What You'll Do

  • Design and implement scalable frontend architectures for complex web applications.
  • Build and maintain reusable UI components and design-system integrations that other engineers ship on.
  • Partner with product managers and designers to turn requirements into clean, high-quality experiences.
  • Lead technical design discussions and own architectural decisions within your domain.
  • Optimize for performance, accessibility, responsiveness, and usability across core flows.
  • Set and enforce frontend standards and patterns, and drive their adoption across teams.
  • Mentor engineers through code reviews and technical guidance, and resolve the gnarly production issues.

Who You Are

  • AI-Native: You're already using AI coding agents daily to multiply your output, and modern tooling is second nature.
  • Deep Frontend Builder: Typically 8+ years in software engineering with serious frontend depth, building modern web apps in JavaScript and TypeScript and maintaining scalable architectures in production.
  • Performance Minded: You have a real command of performance optimization, testing strategy, accessibility, and web standards, and you can prove the wins with metrics.
  • Owner: You take a problem from design through production support, and you raise the bar for the engineers around you.

Bonus points for building and maintaining design systems, modern frameworks like React, Vue, or Angular, cloud-native environments and CI/CD, and a track record of leading technical initiatives across teams.

Benefits

  • Equity: Highly competitive equity package designed for a foundational hire.
  • Hybrid Model: Expected ~2 days per week in-office (Bay Area or NYC).

Apply