R&D Validation and Process Engineer, Materials

Location: Huntington Beach, CA (Onsite)

Compensation: $105,000 - $115,000 (Depending on Experience)

About the Role

SprintRay is redefining digital dentistry by offering the industry's only complete 3D printing solution, seamlessly integrating cutting-edge technology, advanced materials, clinical education, and dedicated customer support throughout the customer journey. As an R&D Validation and Process Engineer, Materials, you will play a critical, hands-on role in validating 3D printing materials, optimizing complex resin processing parameters, and ensuring seamless end-to-end performance across SprintRay's digital dentistry ecosystem. Working in close collaboration with materials scientists, workflow optimization specialists, hardware engineers, and validation teams, you will establish rigorous validation protocols for next-generation dental photopolymers, evaluate material properties from bench scale through production, and author comprehensive process validation reports based on thorough hands-on testing. This is a fully on-site position ideal for a data-driven engineer with a strong background in materials characterization, additive manufacturing process optimization, and technical report writing.

Key Responsibilities

• Design, execute, and document comprehensive validation protocols (IQ/OQ/PQ) for new 3D printing materials, photopolymer resins, and complete post-processing workflows.
• Evaluate mechanical, thermal, and dimensional properties of printed parts to ensure consistency, accuracy, and compliance with clinical standards.
• Optimize 3D printing process parameters (e.g., exposure profiles, layer thickness, light intensity) and post-curing regimes to maximize photopolymer performance, dimensional accuracy, and print reliability.
• Collaborate closely with cross-functional workflow, validation, and hardware teams to support scale-up, tech transfer, and process optimization for chemical manufacturing and resin bottling lines.
• Lead design of experiments (DOE) to investigate resin stability, print reliability, and failure modes across different hardware platforms.
• Maintain the cleanliness and organization in workshop area.
• Follow safety rules and procedures constantly.
• Collect data and perform statistical analysis on user experience to drive product features and reliability improvements.
• Monitor top product failure modes and provide manufacturing knowledge to QA to reduce production costs.
• Maintain a functional Mechanical workshop and maintain inventory level of the R&D department.
• Perform rigorous hands-on laboratory testing and author detailed process validation reports, technical documentation, and standard operating procedures (SOPs) to support product qualification.

Required Qualifications

• Bachelor's degree in Materials Science, Chemical Engineering, Manufacturing Engineering, or a related discipline (or equivalent practical experience).
• 3+ years of experience in materials validation, process engineering, quality assurance, or product development within polymer synthesis or additive manufacturing.
• Strong understanding of photopolymerization chemistry, resin formulations, and additive technologies.
• Hands-on experience operating SLA/DLP 3D printers, post-processing hardware, and materials testing equipment (e.g., tensile/flexural testing, viscosity, UV curing analysis).
• Proven expertise in conducting hands-on materials testing and drafting thorough, publishable process validation reports and technical specifications.
• Knowledge of polymer and materials science principles, including structure-property relationships.
• Familiarity with dental materials, additive manufacturing, or medical device products is preferred.
• Experience supporting process development, optimization, and continuous improvement initiatives.
• Strong analytical and problem-solving skills with a methodical, data-driven approach.
• Excellent organizational and time management skills, with the ability to manage multiple priorities.
• Exceptional attention to detail and commitment to producing high-quality, accurate work.
• Exceptional technical writing, data analysis, and cross-functional communication skills, with a track record of effective collaboration across workflow, validation, and R&D engineering teams.
• Demonstrated ability to work both independently and collaboratively in a fast-paced R&D environment.

Employment Type

Full-time, Onsite

About SprintRay

SprintRay is rewriting the rules of dentistry with technology that’s smart, fast, and designed to make life easier for dental professionals. Since 2014, we’ve been on a mission to deliver the most advanced 3D printing solutions in the industry—combining hardware, software, and materials into one seamless ecosystem. But what really makes SprintRay different is our people. We’re a bold, global team of innovators, problem-solvers, and doers who thrive on pushing boundaries and challenging the status quo. Every product we create is driven by a simple goal: help dentists spend less time on repetitive tasks and more time changing patients’ lives. Our culture is entrepreneurial, collaborative, and fueled by curiosity. We celebrate diverse perspectives and believe the best ideas can come from anywhere. Whether we’re building next-generation AI tools, designing new materials, or supporting our customers on the front lines, we’re united by the same passion—transforming digital dentistry and having fun while we do it. At SprintRay, the future of dentistry is being printed today. Want to be part of it?

Equal Opportunity Employer

SprintRay is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, veteran, or disability status.

To All Recruitment Agencies:

Without a written agreement signed by an officer of SprintRay: a) SprintRay does not accept resumes from recruiting agencies, headhunters, or any other party expecting payment in the event SprintRay speaks with or hires a candidate from such submitted resume; b) SprintRay is not responsible for any fees related to unsolicited resumes or related Terms of Service, and c) Unsolicited resumes received will be considered the property of SprintRay and will be processed accordingly.

Accessibility

If you need a reasonable accommodation during the application or interview process, please contact us at people.services@sprintray.com.