Senior Product Engineer, Filaments and Thermoplastics

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.

Senior Product Engineer, Filaments and Thermoplastics

We develop and commercialize advanced 3D printing filaments and thermoplastic products. This role owns products, not experiments. You'll take formulations from qualification through production at our contract manufacturers, own the specifications and quality criteria that define each product, and stay accountable for how those products perform in customers' hands. The work sits between materials science, manufacturing, and the customer. A strong candidate is someone who understands polymer behavior well enough to diagnose a process or field issue, but who is motivated by shipping reliable products rather than by open-ended research.

What You’ll Do

• Own assigned products end to end, from qualification and launch through ongoing production, cost, and performance
• Manage technical relationships with contract manufacturers and toll processors, including trial planning, on-site production runs, process parameter definition, and troubleshooting
• Define and maintain product specifications, incoming and outgoing test methods, and acceptance criteria
• Qualify and onboard new manufacturing partners, including capability assessment, facility audits, first-article approval, and process validation
• Drive root cause analysis and corrective action on production and field quality issues, working directly with suppliers to close them out
• Lead new product introduction: scope, timeline, qualification plan, launch documentation, and handoff to sales and support
• Serve as the technical point of contact for customer and applications questions, including print performance, material handling, and failure analysis
• Own packaging, moisture control, storage, and handling requirements that protect product quality through the supply chain
• Support cost, margin, and supply continuity decisions with technical judgment on second-source qualification and material substitutions

Required Qualifications

• BS with 5 + years of experience, or MS with 3 + years of experience or PhD in Polymer Science, Polymer/Chemical Engineering, Materials Science, or a related field
• Working knowledge of polymer structure to property relationships and polymer rheology, and the ability to apply it to real production and field problems
• Experience with 3D printing or additive manufacturing, particularly FFF/FDM filament
• Hands‑on experience with melt processing, particularly extrusion or compounding, in a production or scale‑up setting
• Experience owning product, product development and/or process specifications and driving quality issues to closure
• Familiarity with polymer characterization methods, including rheology, thermal analysis, and mechanical testing, and the ability to interpret data and act on it
• Comfortable working on a production floor and traveling to supplier sites, roughly 10 to 25 percent
• Clear written and verbal communication with suppliers, customers, and internal teams

Nice to Have

• Familiarity with engineering thermoplastics such as PA, PC, PEEK, or PEI
• Experience with filled or reinforced systems, including carbon fiber and glass fiber compounds
• Customer-facing or applications engineering experience
• Working knowledge of ASTM/ISO polymer test standards
• Track record of owning commercial products through full lifecycle, including launch and sustaining
• Experience qualifying and managing contract manufacturers, including audits and corrective action processes
• Ability to make and defend technical tradeoff decisions involving cost, quality, and schedule

Compensations

Range: The expected base salary range for this position is between $128,200.00 - $192,400.00. 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.

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.

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.

What You’ll Find at Lyten

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.

Founded in 2015 in Silicon Valley, California, Lyten is transforming the future of energy and materials innovation to build a stronger, more resilient world. Our breakthrough innovation, Lyten 3D Graphene™, is a brand‑new supermaterial that enables the creation of products that perform better and cost less. Lyten is rapidly scaling operations across the U.S. and Europe. Our lithium–sulfur (Li‑S) batteries—free from nickel, manganese, cobalt, and graphite—deliver higher energy density and lighter weight while enabling a more secure, independent supply chain and a next‑generation alternative to traditional lithium‑ion chemistry. The acquisition of Northvolt’s assets in California, Poland, Sweden, and Germany has established a strong foundation for Lyten’s global energy storage growth, including Europe’s largest Battery Energy Storage System (BESS) manufacturing facility. Beyond battery systems, Lyten’s platform technology extends to high‑performance concrete admixtures, advanced composites, adhesives, and sensors, redefining material performance across industries from automotive and aerospace to construction and defense. Lyten has raised over $625 million in equity and received support from the U.S. Export‑Import Bank to provide up to $650 million in financing for international customer energy storage projects. Recognized as one of Fast Company’s “Most Innovative Energy Companies,” one of TIME’s “Top Green Technology Companies,” and a Silicon Valley Defense Group Top 100 National Security Company, Lyten is leading the next wave of high-performance materials and energy systems that enhance energy security and supply chain resilience. Our lithium–sulfur batteries have been selected to power Chrysler’s Halcyon Concept EV. Behind every Lyten innovation is a world‑class team of scientists, engineers, and business leaders from some of the most respected technology, energy, and manufacturing companies — all united by a shared mission to make a lasting global impact. We’re entering an exciting growth phase — expanding production, launching new products, and hiring exceptional talent across engineering, operations, manufacturing, and commercialization. If you’re ready to shape the next era of advanced materials and product innovation — while working alongside some of the brightest minds in science and engineering — join Lyten and help us build the next industrial revolution.

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