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Cold Fusion Developer Jobs in California (NOW HIRING)

Commonwealth Fusion Systems

Senior Metrology Engineer

Milpitas, CA · On-site

$110K - $185K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy ... Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes ...

Maritime Fusion

R&D Technician

San Francisco, CA · On-site

$100K - $160K/yr

About Maritime Fusion Maritime Fusion is building fusion reactors for ships and off grid energy ... Our founding team brings a unique blend of hands-on engineering experience from Tesla and SpaceX ...

Quiet Capital

Principal Mechanical Engineer

Milpitas, CA · On-site

$150 - $225/hr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

About Commonwealth Fusion Systems Commonwealth Fusion Systems is on a mission to deliver the urgent ... Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes ...

Genmo

GPU Performance Engineer

San Francisco, CA · On-site

Optimize cold start latency from seconds to milliseconds for our serving infrastructure * Tune memory access patterns, kernel fusion, and GPU utilization * Collaborate with ML engineers to optimize ...

Genmo

GPU Performance Engineer

San Francisco, CA · On-site

Optimize cold start latency from seconds to milliseconds for our serving infrastructure * Tune memory access patterns, kernel fusion, and GPU utilization * Collaborate with ML engineers to optimize ...

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How much do cold fusion developer jobs pay per hour?

As of Aug 15, 2026, the average hourly pay for cold fusion developer in California is $52.91, according to ZipRecruiter salary data. Most workers in this role earn between $45.10 and $60.00 per hour, depending on experience, location, and employer.

What is a Cold Fusion developer?

A Cold Fusion Developer is a software professional who specializes in building and maintaining web applications using Adobe ColdFusion, a rapid web application development platform. Their responsibilities include writing and optimizing CFML (ColdFusion Markup Language) code, integrating databases, troubleshooting application issues, and ensuring the security and performance of web applications. Cold Fusion Developers often work with other web technologies like HTML, JavaScript, and SQL. They may be involved in both front-end and back-end development tasks. This role is commonly found in organizations that have legacy ColdFusion systems or need rapid prototyping for web applications.

What are some common challenges Cold Fusion developers face when maintaining legacy applications?

Cold Fusion Developers often encounter challenges such as outdated codebases, limited documentation, and integrating newer technologies with older Cold Fusion applications. Maintaining legacy systems can require troubleshooting compatibility issues and refactoring code to improve performance or security. Collaborating closely with stakeholders and other developers is essential to ensure smooth updates and minimal disruptions. Continuous learning and adaptability are key, as developers may need to transition parts of the application to modern frameworks over time.

What are the key skills and qualifications needed to thrive as a Cold Fusion developer, and why are they important?

To thrive as a Cold Fusion Developer, you need strong skills in ColdFusion programming, web application development, and a background in computer science or a related field. Familiarity with databases like MySQL or SQL Server, source control systems such as Git, and experience with CFML frameworks like ColdBox are typically required. Attention to detail, problem-solving ability, and effective communication help developers deliver robust, maintainable code and work well with clients and teams. These skills are essential for building secure, scalable, and efficient web applications that meet business requirements.

What are the most commonly searched types of Cold Fusion Developer jobs in California?

The most popular types of Cold Fusion Developer jobs in California are:

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

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

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

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

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Cold Fusion Developer jobs near you
Infographic showing various Cold Fusion Developer job openings in California as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $110,047 per year, or $52.9 per hour.

Staff Systems Engineer

Commonwealth Fusion Systems

Milpitas, CA

$130K - $200K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 22 days ago

Job description

About Commonwealth Fusion Systems: 

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.

Combining decades of research, top talent, and new technologies, we're designing and building commercially viable fusion power plants. And we're working with policymakers and suppliers to build the energy industry of the future. 

We're in the best position to make it happen. Since 2018, we've raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world.

Now we're looking for more thinkers, doers, builders, and makers to join us. People who'll bring new perspectives, solve tough problems, and thrive as part of a team. 

If that's you and this role fits, we want to hear from you.

Join the power movement as a Staff Systems Engineer
 
We're looking for a Systems Engineer to join our R&D team to serve as the primary Systems Engineer. You will be responsible for the seamless integration and operation of complex machinery, ensuring that mechanical, electrical, and software subsystems work in harmony.
This role requires a unique blend of technical "tool-sense" and program management. You will be the technical authority for critical utility subsystems, the primary troubleshooter during commissioning, and the lead communicator across functional engineering groups (mechanical, electrical, and controls).
What you'll do:
  • Ownership: Act as the primary technical owner for critical subsystems, including vacuum pumps, chillers, and gas delivery modules owning Process and Instrumentation Diagrams, Failure Modes and Effects Analysis, and general equipment layouts
  • Troubleshooting & Operation: Lead the hands-on operation of the equipment; identify, diagnose, and resolve complex electromechanical and software issues during R&D cycles
  • Cross-Functional Leadership: Lead technical discussions and bridge gaps between Mechanical (ME), Electrical (EE), and Software (SW) teams to ensure system-level cohesion
  • Technical Specifications and Requirements: Author and maintain comprehensive equipment specifications and system requirements for new and existing R&D platforms
  • Program Management: Create and manage detailed project schedules and budgets to ensure equipment upgrades and installations stay on track
  • Standardize Best Practices: Implement and maintain engineering workflows and operational SOPs, using semiconductor standards as your guide
  • Project Accountability: Report on program progress, and budget variances to key stakeholders
What we're looking for:
  • Bachelor's or Master's degree in Systems, Mechanical, or Electrical Engineering (or equivalent industrial experience)
  • 12+ years of experience in the operation, integration, or design of complex R&D systems or semiconductor manufacturing equipment
  • Proven ability to manage the interfaces between hardware and software, specifically in motor-controlled and sensor-heavy environments
  • Practical experience managing vacuum architecture (pumps, gauges, leak detection) and thermal management systems (chillers, heat exchangers)
  • High proficiency in tool troubleshooting; comfortable using diagnostic equipment and navigating software control interfaces
  • Demonstrated experience in project accounting and the use of scheduling software to manage complex equipment builds
  • Exceptional ability to lead meetings and translate complex technical requirements across different engineering disciplines
  • Experience leading in a matrixed environment, driving consensus among diverse functional groups
Bonus points for:
  • Semiconductor Background: manufacturing or high-end R&D environment.
  • Standards Knowledge: Familiarity with SEMI, ASME, and safety standards for vacuum and high-voltage equipment.
  • Control Systems: Understanding of PLC or custom software control logic for industrial automation.
Must-have requirements:
  • Ability to lift up to 25 lbs occasionally
  • Perform activities such as stooping, climbing, standing, sitting for extended periods of time
  • Willingness to travel or work required nights/weekends/on-call occasionally
  • Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics
$130,000 - $200,000 a year
Salary range for this full-time position + equity + benefits. The actual salary will depend on level, location, qualifications, and experience. The range displayed on each job posting reflects new hire salaries for the position across all US locations.
 
Benefits include:
  Competitive compensation with equity
  13 Company-wide Holidays
  Flexible vacation days
  10 sick days
  Generous parental leave policy
  Health, dental, and vision insurance
  401(k) with employer matching
  Professional growth opportunities
  Team-building activities
At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we're eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.

We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law.

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, "Export Control Laws"). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.
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