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Testing Intern Jobs in California (NOW HIRING)

Enovix Corporation

R&D Intern

Fremont, CA · On-site

$40 - $45/hr

Battery R&D Internship Enovix is seeking an R&D Intern to support the design, fabrication, testing, and analysis of lithium-ion batteries with silicon-based anodes. This role is well suited for a PhD ...

Enovix Corporation

R&D Intern

Fremont, CA

$40 - $45/hr

Battery R&D Internship Enovix is seeking an R&D Intern to support the design, fabrication, testing, and analysis of lithium-ion batteries with silicon-based anodes. This role is well suited for a PhD ...

Enovix

R&D Intern

Fremont, CA · On-site

$40 - $45/hr

Battery R&D Internship Enovix is seeking an R&D Intern to support the design, fabrication, testing, and analysis of lithium-ion batteries with silicon-based anodes. This role is well suited for a PhD ...

Tryfacta, Inc.

Student/Graduate Intern

San Jose, CA · On-site

$28.27 - $32.27/hr

Support development, installation, coding, integration, testing, documentation, and maintenance of business systems and database applications. * Assist with IBM Maximo Application Suite and Kayuga ...

AtriCure

Engineering Intern

Pleasanton, CA

$18.75 - $24.25/hr

The Co-Op/Intern is an undergrad or master's student pursing an engineering degree and is ... Responsible for testing, following guidelines described in the AtriCure Quality System, including ...

USI INC

IT Intern

Milpitas, CA

$17 - $22.75/hr

Help install and update software applications * Assist in testing new tools or features * Provide ... INTERN

GKN Aerospace

ME Intern

El Cajon, CA · On-site

$16.75 - $21.75/hr

The Manufacturing Engineer - Intern will assist in programming, testing, and optimizing equipment. They are responsible for learning new systems, executing programs effectively and documenting ...

GKN Aerospace Careers

ME Intern

El Cajon, CA · On-site

$16.75 - $21.75/hr

The Manufacturing Engineer - Intern will assist in programming, testing, and optimizing equipment. They are responsible for learning new systems, executing programs effectively and documenting ...

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All JobsTesting Intern JobsTesting Intern Jobs in California

Testing Intern information

What is a testing intern?

Testing Interns are entry-level professionals, often students or recent graduates, who assist in software or product testing within a company. Their primary responsibilities include executing test cases, reporting bugs, and documenting results to ensure that software or products meet quality standards. Testing Interns work closely with QA teams and developers, gaining hands-on experience in various testing methodologies, tools, and best practices. This role helps them develop technical skills and an understanding of the software development lifecycle.

What are the typical responsibilities and learning opportunities for a testing intern?

As a Testing Intern, you'll typically assist in executing test cases, documenting defects, and collaborating with developers and senior testers to ensure software quality. You'll gain hands-on experience with various testing tools, learn about test planning, and understand the software development lifecycle. This role offers a valuable chance to develop analytical and problem-solving skills while contributing to real-world projects, and you'll often participate in team meetings and code reviews to deepen your understanding of quality assurance practices.

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

To thrive as a Testing Intern, you need a foundational understanding of software testing principles, basic programming knowledge, and attention to detail, typically supported by coursework in computer science or related fields. Familiarity with testing tools such as Selenium, JUnit, or Bugzilla and version control systems like Git is often expected. Strong analytical thinking, effective communication, and a willingness to learn help Testing Interns excel in team environments and adapt to new challenges. These skills and qualities ensure accurate defect identification, efficient collaboration, and valuable contributions to software quality.

What are the most commonly searched types of Testing jobs in California?

The most popular types of Testing jobs in California are:

What cities in California are hiring for Testing Intern jobs?

Cities in California with the most Testing Intern job openings:

Testing Intern jobs near you
Infographic showing various Testing Intern job openings in California as of August 2026, with employment types broken down into 1% As Needed, 78% Full Time, 15% Part Time, 5% Contract, and 1% Nights. Highlights an 87% Physical, 3% Hybrid, and 10% Remote job distribution.

R&D Intern

Enovix Corporation

Fremont, CA • On-site

$40 - $45/hr

Full-time

Re-posted 18 days ago

Job description

Battery R&D Internship
Enovix is seeking an R&D Intern to support the design, fabrication, testing, and analysis of lithium-ion batteries with silicon-based anodes. This role is well suited for a PhD student or graduate researcher with strong experience in electrochemistry, battery materials, cell testing, and failure analysis.
The ideal candidate will bring deep technical expertise in battery materials and electrochemistry, a hands-on approach to experimentation, and enthusiasm for addressing complex challenges in silicon anode commercialization.
The intern should be comfortable working across fundamental science, experimental execution, and product-focused battery development. The intern will collaborate closely with scientists, engineers, and technical leadership to support the development of high-performance lithium-ion cells.
Key Responsibilities
The intern will contribute to one or more of the following areas:
  • Design and evaluate silicon-based anode materials, composites, binders, conductive additives, and electrode formulations.
  • Fabricate electrodes and coin, pouch, or other test cells for electrochemical evaluation.
  • Perform battery testing, including formation, cycling, rate capability, fast-charge testing, impedance measurements, and diagnostics.
  • Analyze capacity retention, coulombic efficiency, impedance growth, swelling, and other key performance metrics.
  • Investigate silicon anode degradation mechanisms, including volume expansion, SEI evolution, particle fracture, lithium inventory loss, and electrode-level failure modes.
  • Use materials characterization techniques such as SEM, TEM, XRD, XPS, Raman, FTIR, BET, TGA, or related methods, as applicable.
  • Develop clear, data-driven recommendations to guide silicon anode material and cell design.
  • Document experimental procedures, results, and conclusions in technical reports and presentations.
  • Work cross-functionally with materials, cell engineering, process development, and product teams.

Required Qualifications
  • Currently enrolled in a PhD program at a leading university, national laboratory, or research institute with a strong focus on batteries, electrochemistry, materials science, chemical engineering, mechanical engineering, or a related field.
  • Research experience in lithium-ion batteries, preferably silicon-carbon or other advanced anode systems.
  • Strong understanding of lithium-ion battery fundamentals, including electrode design, interfacial chemistry, SEI formation, transport limitations, and cell degradation.
  • Hands-on experience with battery cell assembly and electrochemical testing.
  • Ability to analyze complex experimental data and translate results into actionable technical insights.

Preferred Qualifications
  • Direct experience with silicon anode materials, silicon-carbon composites, pre
  • lithiation, binder systems, electrolyte additives, or high-loading electrode design.
  • Familiarity with advanced diagnostic methods such as EIS, GITT, dQ/dV analysis, post-mortem analysis, gas analysis, or mechanical swelling measurements.
  • Experience using Python, MATLAB, JMP, Origin, or similar tools for data analysis.
  • Publications, patents, or conference presentations related to lithium-ion batteries or advanced anode materials.
  • Experience working in industry, a national laboratory, or a collaborative applied research environment.

What You Will Gain
  • Hands-on experience developing next-generation silicon anode lithium-ion battery technology.
  • Exposure to startup-style R&D, rapid experimentation, and practical cell development.
  • Opportunity to work closely with experienced battery scientists and engineers.
  • Experience translating academic research into commercially relevant battery technology.

This is a paid internship that will be onsite at our Fremont, CA office, with an expected duration of 3-6 months. The hourly pay range is $40-$45, depending on experience, qualifications, and other job-related factors.

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