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Performance Engineer Jobs in California (NOW HIRING)

Anthropic

Performance Engineer, GPU

San Francisco, CA · On-site

As a GPU Performance Engineer, you'll architect and implement the foundational systems that power Claude and push the frontiers of what's possible with large language models. You'll be responsible ...

Oklo

Fuel Performance Engineer

Santa Clara, CA · On-site +1

$120K - $165K/yr

We are searching for a Fuel Performance Engineer to join our team. Position Description Fuel Performance Engineers at Oklo are responsible for the fuel performance analyses and verification of ...

Oklo

Fuel Performance Engineer

Santa Clara, CA · On-site +1

$120K - $165K/yr

We are searching for a Fuel Performance Engineer to join our team. Position Description Fuel Performance Engineers at Oklo are responsible for the fuel performance analyses and verification of ...

Anthropic

Performance Engineer, GPU

San Francisco, CA · On-site

$280K - $850K/yr

As a GPU Performance Engineer, you'll architect and implement the foundational systems that power Claude and push the frontiers of what's possible with large language models. You'll be responsible ...

OpenAI

Training Performance Engineer

San Francisco, CA · On-site

$250K - $445K/yr

About the Role As a Training Performance Engineer, you'll drive efficiency improvements across our distributed training stack. You'll analyze large-scale training runs, identify utilization gaps, and ...

Slope

Training Performance Engineer

San Francisco, CA · On-site

$250 - $460/hr

About the Role As a Training Performance Engineer, you'll drive efficiency improvements across our distributed training stack. You'll analyze large-scale training runs, identify utilization gaps, and ...

AFL

System Performance Engineer

Los Angeles, CA · On-site

The System Performance Engineer is responsible for wireless carrier system performance. This position supports technical activities for the ongoing maintenance and monitoring of wireless systems.

Genmo

GPU Performance Engineer

San Francisco, CA · On-site

We're seeking a GPU Performance Engineer to squeeze every last FLOP from our H100 infrastructure and optimize our model serving stack to its absolute limits. The Role You'll be our performance ...

Genmo

GPU Performance Engineer

San Francisco, CA · On-site

We're seeking a GPU Performance Engineer to squeeze every last FLOP from our H100 infrastructure and optimize our model serving stack to its absolute limits. The Role You'll be our performance ...

ICANN

Senior Performance Engineer Test

Los Angeles, CA · On-site

The Senior Performance Engineer Test is responsible for defining, implementing, and evolving the performance engineering strategy for ICANN's mission-critical applications and services. This role ...

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All JobsPerformance Engineer JobsPerformance Engineer Jobs in California

Performance Engineer information

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$10

$59

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How much do performance engineer jobs pay per hour?

As of Aug 14, 2026, the average hourly pay for performance engineer in California is $59.32, according to ZipRecruiter salary data. Most workers in this role earn between $48.65 and $67.12 per hour, depending on experience, location, and employer.

What is the difference between Performance Engineer vs Software Test Engineer?

AspectPerformance EngineerSoftware Test Engineer
Primary FocusOptimizing system performance, load testing, scalabilityFunctional testing, bug identification, feature validation
Required SkillsPerformance testing tools, scripting, system analysisTest case design, automation, defect tracking
Work EnvironmentDevelopment teams, QA, DevOpsQA teams, development teams
CertificationsPerformance testing certifications (e.g., JMeter, LoadRunner)ISTQB, software testing certifications

Performance Engineers focus on system performance, scalability, and load testing, ensuring applications run efficiently under stress. Software Test Engineers primarily verify functionality and identify bugs. While both roles require testing skills, Performance Engineers specialize in performance metrics and optimization, making their roles complementary but distinct.

What is the work of performance engineer?

A performance engineer is responsible for analyzing, testing, and optimizing software or system performance to ensure reliability and efficiency. They use tools like load testing and monitoring software to identify bottlenecks and improve system scalability, often working closely with development and operations teams.

What are the key skills and qualifications needed to thrive as a performance engineer, and why are they important?

To thrive as a Performance Engineer, you need strong analytical abilities, a solid understanding of software architecture, and experience with load testing and profiling, often supported by a degree in computer science or a related field. Familiarity with tools such as JMeter, LoadRunner, New Relic, and monitoring systems, as well as scripting languages, is typically required. Excellent problem-solving, attention to detail, and effective communication skills help distinguish top performers in this role. These skills and qualities are crucial for identifying system bottlenecks, optimizing performance, and ensuring a seamless user experience.

What do performance engineers do?

Performance engineers analyze and optimize software systems to ensure they meet performance requirements, such as speed, scalability, and stability. They use tools like load testing and monitoring software to identify bottlenecks and improve system efficiency, often working closely with development and QA teams. Strong knowledge of scripting, performance testing tools, and system architecture is essential for this role.

What is a performance engineer?

A Performance Engineer is a professional who ensures that software applications and systems run efficiently and meet performance requirements. They analyze, test, and optimize system performance by identifying bottlenecks, conducting load and stress testing, and recommending improvements. Performance Engineers work closely with development and operations teams to ensure that applications can handle expected user loads and deliver a smooth user experience. Their work is crucial in preventing slowdowns, crashes, and other performance-related issues in production environments.

What is performance engineering?

Performance engineering is the development of software solutions for specific business problems. As a performance engineer, your responsibilities are to identify issues, whether for a particular company or an industry, and develop software that directly addresses them. To become a performance engineer, you need a bachelor’s degree in computer science or computer engineering, two to five years of information technology (IT) work experience, and excellent problem solving skills. Organizations like HyPerformix offer professional certifications, like their Enterprise Performance Engineering program, which can significantly boost your qualifications. Your additional job duties include performing routine maintenance and service, experimenting with possible solutions in the test environment, and monitoring system performance.

What are some common challenges performance engineers face when optimizing complex systems?

Performance Engineers often encounter challenges such as identifying bottlenecks in multi-tiered or distributed systems, balancing trade-offs between speed and resource consumption, and ensuring that performance improvements do not compromise system reliability. They frequently work with cross-functional teams, requiring strong communication skills to translate technical findings into actionable recommendations. Staying up-to-date with evolving tools and best practices is also essential, as technology stacks and performance benchmarks continually change.
More about Performance Engineer jobs

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The most popular types of Performance Engineer jobs in California are:

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For Performance Engineer jobs in California, the most frequently searched job titles are:

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The top searched job categories for Performance Engineer jobs in California are:

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Cities in California with the most Performance Engineer job openings:

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For Performance Engineer jobs in CA, the most frequently searched job titles are:

Performance Engineer jobs near you
Infographic showing various Performance Engineer job openings in California as of August 2026, with employment types broken down into 1% As Needed, 84% Full Time, 11% Part Time, 2% Temporary, and 2% Contract. Highlights an 91% Physical, 2% Hybrid, and 7% Remote job distribution, with an average salary of $123,381 per year, or $59.3 per hour.

Performance Engineer

Integrated Resources INC

Walnut Creek, CA • On-site

Full-time

Re-posted 12 days ago

Job description

Company Description

IRI believes in commitment, integrity and strategic workforce solutions.

Integrated Resources, Inc., is led by a seasoned team with combined decades in the industry. We deliver strategic workforce solutions that help you manage your talent and business more efficiently and effectively. Since launching in 1996, IRI has attracted, assembled and retained key employees who are experts in their fields. This has helped us expand into new sectors and steadily grow.


We've stayed true to our focus of finding qualified and experienced professionals in our specialty areas. Our partner-employers know that they can rely on us to find the right match between their needs and the abilities of our top-tier candidates. By continually exceeding their expectations, we have built successful ongoing partnerships that help us stay true to our commitments of performance and integrity.


Our team works hard to deliver a tailored approach for each and every client, critical in matching the right employers with the right candidates. We forge partnerships that are meant for the long term and align skills and cultures. At IRI, we know that our success is directly tied to our clients' success.

Job Description


Position: Performance Engineer

Duration: 1 Year Contract 

Location: Walnut Creek, CA

Direct client: Immediate Interview 

Responsibilities: 

- Perform performance/scalability testing on our backend messaging platform 

- The ideal candidate will have both the ability to create high-level benchmarks, working closely with Product Management and dev architects to define them, as well as the ability to develop micro-benchmarks to help isolate performance bottlenecks and confirm performance gains 

- Deploy and manage clusters spanning hundreds of nodes 


Requirements: 

5+ years industry experience 

Skilled in both the art and science of benchmark creation and measurement and modelling of system behaviour under load 

Strong understanding of Java performance: garbage collection, heap dump analysis, tuning, caching, throttling and Java profiling 

Knowledge of statistical analysis and experimental design techniques 

Good knowledge of Hadoop, Oracle and SQL 

Deep knowledge of web services standards and related technologies (XML, SOAP, REST) 

Strong knowledge of TCP/IP networking 

Experience in system monitoring and problem troubleshooting 

Equal comfort in Microsoft and Unix/Linux environments in terms of both tools and systems administration. 

Experience in tackling problems of load, scale, and optimizations of complex large-scale deployments 

Experience with Silk Performer tool is a plus 

Experience with Java is a plus 

Ability to find root cause of performance bottlenecks

Education: 

Bachelor's degree or higher in Computer Science, or equivalent


Additional Information

Nagesh 

Sr.Technical Recruiter

Integrated Resources, Inc.

IT Life Sciences Allied Healthcare CRO

Certified MBE |GSA - Schedule 66 I GSA - Schedule 621I

DIRECT # - 732 - 429 -1641 | (W) # 732-549-2030 - Ext - 305 | (F) 732-549-5549  

Gold Seal JCAHO Certified for Health Care Staffing

"INC 5000's FASTEST GROWING, PRIVATELY HELD COMPANIES" (8th Year in a Row)


Integrated Resources logo

About Integrated Resources

Sourced by ZipRecruiter

Integrated Resources Inc (IRI), based in Edison, NJ, US, is an esteemed player in the staffing solutions industry with a credible presence on their official website irionline.com. Notably, IRI provides a range of professional staffing services including contract, contract-to-hire, and direct hire solutions to a wide spectrum of industries such as healthcare, life sciences, manufacturing, financial, insurance, and others. Since its inception, IRI has been committed to delivering top-talent and optimum solutions to meet its clients' diverse needs.

Industry

Recruiting and staffing services

Company size

51 - 200 Employees

Headquarters location

Edison, NJ, US

Year founded

1996

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