Weekend Graduate Polymer Engineer Jobs in California

Lyten is leading an industrial revolution through Lyten 3D Graphene, a breakthrough supermaterial unlocking a new generation of products - from lithium-sulfur batteries and energy storage systems to concrete admixtures, lightweight composites, and next-generation sensors that are revolutionizing industries. Together, these innovations are making a massive global improvement and driving real-world impact across energy, mobility, construction, and defense.

At Lyten, we believe the most meaningful careers begin with purpose - and with people who want to make a difference. We're not just developing advanced supermaterials - we're about to change the world as we know it, reshaping how energy is stored, how products are built, and how progress is made.

We're entering an exciting growth phase, scaling production across the U.S. and Europe and expanding our team of engineers, scientists, and innovators.

Apply now to join our team and be part of something bigger than yourself - where collaboration, creativity, and purpose come together to build the technologies that will define the next century.

Polymer Composites Intern

This Polymer Composites Intern will support active filament development, product improvement, manufacturing follow-up, and customer-facing print validation efforts. The intern will help generate consistent data across multiple material lots and manufacturing conditions, helping the team better understand the relationship between filament quality, printability, and mechanical performance.

Key Responsibilities

The intern will work closely with the composites and materials development team to:

• Print standardized 3D printed test coupons using reinforced polymer filament materials.
• Record and track print parameters, including nozzle temperature, bed temperature, chamber conditions, print speed, orientation, drying conditions, and other relevant variables.
• Document printability observations such as feeding behavior, bed adhesion, warpage, surface quality, dimensional consistency, and print defects.
• Characterize filament quality attributes such as filament diameter consistency, ovality, surface appearance, brittleness, spool quality, and general handling behavior.
• Support mechanical testing of printed coupons, including tensile, flexural, impact, or other relevant tests as directed by the team.
• Organize and analyze data to compare filament lots, print conditions, and resulting mechanical performance.
• Help identify trends between filament attributes, processing behavior, and printed part properties.
• Summarize findings and provide recommendations for QC methods, product improvement, and future testing.
• Maintain clear documentation in lab notebooks, spreadsheets, test summaries, and final presentation materials.
• Follow all applicable safety procedures and maintain a clean, organized lab and printing workspace.

Educational Requirements

• Currently pursuing a Bachelors degree in Materials Science and Engineering, Mechanical Engineering, Polymer Science, Chemical Engineering, Manufacturing Engineering, or a related technical field.
• Preferred academic standing: rising junior, rising senior, or graduate student.
• Coursework in materials science, polymers, composites, mechanical testing, manufacturing, statistics, or additive manufacturing is preferred.

Experience Requirements

Required:

• Hands-on laboratory, engineering project, research, or coursework experience.
• Basic understanding of engineering materials, mechanical properties, or polymer/composite behavior.
• Ability to follow written procedures, collect data carefully, and document observations clearly.
• Proficiency with Microsoft Excel, Google Sheets, or similar tools for organizing and analyzing data.
• Strong attention to detail, safety awareness, and willingness to work hands-on in a lab environment.

Preferred but not required:

• Experience with FDM/FFF 3D printing.
• Experience printing or testing engineering polymers, nylon, carbon fiber reinforced materials, or composite materials.
• Familiarity with mechanical testing methods such as tensile, flexural, impact, or compression testing.
• Experience with basic dimensional measurement tools such as calipers, micrometers, or optical measurement systems.
• Exposure to data analysis, basic statistics, Python, JMP, Minitab, or similar tools.
• Experience documenting experimental work in lab notebooks, test reports, or technical presentations.

Desired Skills and Attributes

• Curious, hands-on, and comfortable working with both equipment and data.
• Organized and detail-oriented, especially when tracking multiple material lots and test variables.
• Able to communicate technical observations clearly to engineers and scientists.
• Comfortable asking questions, troubleshooting print issues, and adapting test plans based on results.
• Interested in materials development, 3D printing, polymer composites, product quality, and manufacturing scale-up.

Physical Demands and Working Conditions

• Wear personal protective equipment including, but not limited to, a lab coat, gloves, and safety glasses.
• Precise and repetitive handling of a range of material quantities.
• Use a fume hood to prepare samples.
• Operate analytical and 3D printing equipment at a bench.
• Move long distances (such as from building to building) and be stationary for extended periods of time.

Operate a computer and other office equipment, such as a laptop, printer, etc. in a fixed location.

Compensations Range:

The expected base salary range for this position is between

$25.00 - $32.00

The level of pay within the range will depend on a variety of job-related factors that may include location, relevant prior experience and/or education, or particular skills and expertise.

Disclosures:

Pay Transparency Disclosure:

This compensation and benefits information is based on Lyten's estimate as of the date of publication and may be modified in the future. We generally do not negotiate on salary once we have made an offer. The level of pay within the range will depend on a variety of job-related factors that may include location, relevant prior experience and/or education, or particular skills and expertise. New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company-specific knowledge.

In addition to base pay this position is eligible for tier based bonus and equity, healthcare, dental, vision, corporate discounts, paid holidays, PTO and sick time, 401K, employee relocation plan (if applicable)

Export/ITAR Compliance Disclosure:

Certain positions within Lyten, Inc. require compliance with export control laws and, as a result, all interviewed candidates will be screened pre-interview to determine their eligibility in light of export restrictions.

This position requires access to technology, software and other information that is subject to governmental access control restrictions, due to export controls. Employment in this position is conditioned on the continued availability of government authorization to authorize release of such items, to the extent required, including without limitation an export license, or other documentation required to establish authorization to receive access to such items. Company may delay commencement of employment, rescind an offer of employment, terminate employment, and/or may modify job responsibilities, compensation, benefits, and/or access to Company facilities and information systems, as Company deems appropriate, in order to ensure compliance with applicable government access control restrictions.

Lyten is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, religion, color, national origin, sex, age, status as a protected veteran, or status as a qualified individual with a disability. EEO Employer/Vet/Disabled.

IMPORTANT: Please be aware that fictitious job openings, consulting engagements, solicitations, interviews or employment offers may be circulated on the Internet in an attempt to obtain privileged information, or to induce you to pay a fee for services related to recruitment or training. Lyten Does NOT charge any application, processing, or training fee at any stage of the recruitment or hiring process. We Do NOT use any messaging apps to recruit or communicate at any time during the recruiting process. Links to the actual job posting will be provided in the email, please verify the position is posted prior to communicating. All genuine job openings will be posted on our careers page and all communications will be from the recruiting team and will be from a @lyten.com email address.

Principals only; third party or agency submitted candidates will not be considered.

Why Work at Lyten

At Lyten, you'll be part of a team that's redefining what's possible in energy, materials, and manufacturing. We're not just imagining the future - we're building it today with breakthrough technologies that are changing how products are made and how industries innovate.

Our people are the heart of that mission. From world-class scientists and engineers to creative problem-solvers in operations, manufacturing, and commercialization, every member of the Lyten team plays a role in turning bold ideas into real-world impact. We believe that the best work happens when you're doing great things in the world - with people you like. Collaboration, curiosity, and a shared sense of purpose drive everything we do.

What You'll Find at Lyten

• A mission that matters: Contribute directly to solving complex challenges in energy, mobility, and materials innovation.

• Cutting-edge innovation: Work on technologies at the intersection of materials science, energy storage, and advanced manufacturing that strengthen energy security and local supply chains.

• Extraordinary people: Join a team of talented, friendly, and down-to-earth innovators who support, challenge, and inspire one another every day.

• Teamwork and culture: Experience a workplace built on trust, respect, and shared success - where collaboration fuels breakthroughs and everyone's ideas are heard.

• Global impact: Help scale new materials and energy solutions that reinforce industrial resilience across the U.S. and Europe.

• Career growth: Be part of a fast-moving company entering a commercial growth phase, with opportunities to lead, learn, and make your mark.

• Purpose-driven values: Thrive in an environment that celebrates ingenuity, optimism, and meaningful progress - together.

Lyten offers the opportunity to do the most important work of your career - helping build the technologies that will power the next century of innovation.

Join us, and help transform industries, communities, and the planet with friends who share your drive to make a difference.