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Gui Developer Jobs in California (NOW HIRING)

Fortinet

Principal Front-End Web Developer

Sunnyvale, CA · On-site +1

$148K - $180K/yr

Brainstorm, propose, and implement new features for the GUI. * Investigate bugs that may have ... product, and/or other engineers to discuss and refine these specifications. * Propose and ...

ATA Engineering, Inc

Engineering Software Programmer

CA · On-site

$85K - $125K/yr

GUI programming experience. * Familiarity with hardware programming a plus. * Comfortable with Windows and Linux operating systems. Requirements: The ideal candidate would have all of the following ...

Siri InfoSolutions Inc

NX Developer

Santa Clara, CA · On-site

NX Developer Location: Santa Clara Valley, CA Work Model: Hybrid (3 days a week) 5-8 years of ... C#/VB GUI development using Block styler in UGNX or WINFORMS using .NET technology. Working ...

Jobsbridge

Junior .NET Developer

Los Angeles, CA

$72K - $93K/yr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers ... GUI and .NET. Qualifications C#, ASP.NET,SQL queries Additional Information Only OPT

Jitx Inc.

Senior Software Engineer

Berkeley, CA · On-site

$150K - $250K/yr

Instead of dragging components around in a GUI, engineers write code (or have AI write it for them) to define their circuit boards. Our solvers handle the low-level details, making hardware ...

Jitx Inc.

Senior Software Engineer

Berkeley, CA · On-site +1

$150K - $250K/yr

Instead of dragging components around in a GUI, engineers write code (or have AI write it for them) to define their circuit boards. Our solvers handle the low-level details, making hardware ...

Jitx Inc.

Senior Software Engineer

Berkeley, CA · On-site +1

$150K - $250K/yr

Instead of dragging components around in a GUI, engineers write code (or have AI write it for them) to define their circuit boards. Our solvers handle the low-level details, making hardware ...

Esri

C++ Windows Developer II - ArcGIS Pro

Redlands, CA · On-site

$49.25 - $66.50/hr

... GUI as part of ArcGIS Pro • Build software that follows industry-standard design patterns ... developers throughout the development process Qualifications : Required : • 2+ years of ...

Esri

C++ Windows Developer II - ArcGIS Pro

Redlands, CA · On-site

$49.25 - $66.50/hr

... GUI as part of ArcGIS Pro • Build software that follows industry-standard design patterns ... developers throughout the development process Qualifications : Required : • 2+ years of ...

Donato Technologies, Inc

Ruby on Rails Developer

Sunnyvale, CA · On-site

$120K - $164K/yr

Ruby on Rails Developer Location: Sunnyvale, CA Job Summary - For this role, we are looking for a ... Both front-end (GUI) and back-end development. Behavioral Skills: * Excellent Communication skills ...

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All JobsGui Developer JobsGui Developer Jobs in California

Gui Developer information

See California salary details

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How much do gui developer jobs pay per hour?

As of Aug 18, 2026, the average hourly pay for gui developer in California is $50.83, according to ZipRecruiter salary data. Most workers in this role earn between $41.73 and $61.68 per hour, depending on experience, location, and employer.

What is a GUI developer?

A GUI Developer is responsible for designing and implementing user interfaces for software applications, ensuring a seamless and visually appealing user experience. They use front-end technologies like HTML, CSS, JavaScript, and frameworks such as React or Angular to build interactive components. Their role involves collaborating with UX designers, back-end developers, and other stakeholders to create responsive, efficient, and user-friendly interfaces.

What does a GUI developer do?

A typical day for a GUI Developer involves designing, coding, and testing user interfaces, collaborating closely with UX/UI designers to ensure layouts are both functional and visually engaging. You will work as part of a multidisciplinary development team, often participating in daily stand-ups, code reviews, and feedback sessions with backend developers and product managers. GUI Developers may also engage in troubleshooting and optimizing interface performance, as well as adapting designs based on user feedback or evolving project goals. Effective teamwork and communication are key, as your work directly impacts how end-users interact with the final product.

What are the key skills and qualifications needed to thrive in the GUI developer position?

To thrive as a GUI Developer, you need strong programming skills in languages such as JavaScript, HTML, CSS, and familiarity with frameworks like React, Angular, or Qt, often supported by a degree in computer science or related field. Experience with design tools (e.g., Adobe XD, Figma) and an understanding of user interface guidelines are typically required, and certifications in front-end development can be advantageous. Creativity, attention to detail, and effective communication are vital soft skills that help bridge the gap between design and functionality. These abilities are important to create intuitive, visually appealing, and user-friendly interfaces that enhance the overall user experience.

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

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

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

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

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Gui Developer jobs near you
Infographic showing various Gui Developer job openings in California as of August 2026, with employment types broken down into 84% Full Time, and 16% Contract. Highlights an 84% In-person, and 16% Remote job distribution, with an average salary of $105,732 per year, or $50.8 per hour.

Principal Front-End Web Developer

Fortinet

Sunnyvale, CA • On-site, Remote

$148K - $180K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 11 days ago

Job description

We're seeking a self-motivated, detail-oriented web front-end engineer with significant JS/HTML/CSS experience to help maintain and enhance the web-based GUI for the FortiSwitch network switch. Our ideal candidate will be a self-starter, capable of reviewing their own work thoroughly to check for issues and mistakes, and somebody who is proactive in locating and fixing existing bugs as well as proposing new features and ways to streamline the internal design of the system. The candidate will be expected to learn some Python and C coding (if not already proficient) for integration with the rest of the system; candidates with existing Python, C, and/or Cython experience are especially well-qualified in this regard.

Job Responsibilities:

  • Locate, fix, and verify bugs in the FortiSwitchOS web-based GUI code.

  • Brainstorm, propose, and implement new features for the GUI.

  • Investigate bugs that may have associations or origins in other parts of the codebase (which is predominantly C code).

  • Interface with other FortiSwitch team members to gain information or help diagnose and fix bugs that manifest in the GUI.

  • Write and maintain significant amounts of i18n- and a11y- compliant HTML, JS and CSS, with careful attention to TypeScript rules, SCSS syntax, and general coding practices already reflected in the codebase.

  • Compose functional specifications for new features and interface with QA, management, product, and/or other engineers to discuss and refine these specifications.

  • Propose and proactively implement changes to the structure of the GUI codebase in order to improve maintainability and simplify the code structure and size.

  • Assess and improve performance of the GUI system including both middleware/backend portions and frontend aspects and implement streamlined alternatives.

Requirements:

  • At least 5 years of experience in front-end web development

  • Familiarity or fluency with Typescript and SCSS.

  • Fluency in HTML, CSS, and Javascript (ES6).

  • Proficient in the use of AJAX and Promise methodologies.

  • Familiar with front-end component-based frameworks such as Vue or React.

  • Ability to learn new languages and technologies/frameworks quickly.

  • Education in algorithmic complexity (independent of a particular language).

  • Self-motivated with strong problem solving, diagnostic, and documentation skills.

  • Ability to interface seamlessly with remote workers.

Education:

  • Bachelor's or Master's degree in Computer Science or related area.

Must be authorized to work in the U.S. without sponsorship.

The US base salary range for this full-time position is $148,000-$180,000. Fortinet offers employees a variety of benefits, including medical, dental, vision, life and disability insurance, 401(k), 11 paid holidays, vacation time, and sick time, as well as a comprehensive leave program.

Wage ranges are based on various factors, including the labour market, job type, and job level. Exact salary offers will be determined by factors such as the candidate's subject knowledge, skill level, qualifications, experience, and geographic location.

All roles are eligible to participate in the Fortinet equity program. Bonus eligibility is reviewed at the time of hire and annually at the Company's discretion.

Why Join Us:

We encourage candidates from all backgrounds and identities to apply. We offer a supportive work environment and a competitive Total Rewards package to support you with your overall health and financial well-being.

Embark on a challenging, enjoyable, and rewarding career journey with Fortinet. Join us in bringing solutions that make a meaningful and lasting impact to our 890,000+ customers around the globe.

Fortinet (NASDAQ: FTNT) secures the largest enterprise, service provider, and government organizations around the world. Fortinet empowers its customers with intelligent, seamless protection across the expanding attack surface and the power to take on ever-increasing performance requirements of the borderless network - today and into the future. Only the Fortinet Security Fabric architecture can deliver security without compromise to address the most critical security challenges, whether in networked, application, cloud or mobile environments. Fortinet ranks number one in the most security appliances shipped worldwide and more than 500,000 customers trust Fortinet to protect their businesses.

We are committed to providing reasonable accommodations for all qualified individuals with disabilities. If you require assistance or accommodation due to a disability, please contact us at accommodations@fortinet.com.
 
Fortinet is an equal opportunity employer. We value diversity in our company, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, age, military/veteran status or any other applicable legally protected characteristics in the location in which the candidate is applying.

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