Junior Application Engineer - Scientific Instruments

Job Description

Job Description

Job Title: Application Engineer
Location: Costa Mesa, CA (On-site, with up to 40% travel)
Company: Bettersize Inc.
Type: Full-time

Position Overview

Bettersize Inc. is seeking a proactive and technically skilled Application Engineer to play a key role in product demonstrations, installations, technical training, and instrument service for our line of scientific instruments.

This role is based in our Costa Mesa, CA laboratory, working under the guidance of the Technical Director and in close collaboration with our sales team to ensure an excellent customer experience and effective pre- and post-sales support. As Bettersize continues to grow, we expect this position to evolve into broader responsibilities in application or product management within 2–3 years. Due to the nature of pre- and post-sales support, up to 40% travel is required.

Key Responsibilities

• Pre-sales technical support (30%) :
• • Conduct on-site/remote product demonstrations for prospective customers.
  • Analyze customer samples sent to the lab and provide reports with expert interpretation.
  • Provide technical/application Q&A in support of sales activities.
• Post-sales support (30%) :
• • Communicate installation requirements with customers and confirm readiness.
  • Perform instrument installation, calibration, and on-site training.
  • Test standard and customer samples for validation.
• Technical service & repair (20%) :
• • Lead troubleshooting and repairs, remotely or on-site.
  • Coordinate instrument replacement and complete repairs in the Costa Mesa lab when remote/on-site fixes are not possible.
  • Deliver fast, professional service to maintain customer satisfaction.
• Lab management (10%) : Maintain the Costa Mesa laboratory and ensure all instruments remain in optimal working condition.
• Events & outreach (5%) : Attend trade shows, technical seminars, and marketing events.
• Headquarters training (5%) : Travel to company headquarters in China for technical training (every two years, 1–2 weeks per visit).

Qualifications (Entry-Level Friendly)

• Bachelor’s degree in Chemistry, Chemical Engineering, Materials Science, Pharmaceutical Engineering, or a closely related field
  (Master’s degree is a plus but not required.)
• Hands-on laboratory experience gained through coursework, academic research, or internships.
• General familiarity with scientific instruments and a strong willingness to learn new technologies.
• Good verbal and written communication skills, with the ability to explain technical concepts clearly after training.
• Self-motivated, well-organized, and able to work both independently and collaboratively in a team environment.
• Legally authorized to work in the United States.
• Able to access customer sites, including university, industrial, or government research facilities, as required for the role.
• Willingness and ability to travel for company training, including international travel if needed (passport required; company will support visa process).

Preferred (But Not Required)

• Internship, co-op, academic project, or early-career experience involving laboratory instrumentation, technical support, or application work.
• Introductory exposure to particle size analysis, laser diffraction, dynamic light scattering, or similar analytical techniques through coursework or lab work.
• Experience giving presentations in academic, laboratory, or training settings (e.g., class projects, poster sessions, or internal demonstrations).
• Experience in customer-facing technical roles such as applications support, product specialist, or technical sales support.

Strong product, technology, and marketing support from our Asia-based parent company, combined with a collaborative, start-up style team in the U.S. offering high growth potential.
Bettersize ( is a leading global provider of particle sizing and materials characterization solutions, headquartered in China with a 30-year history. Our instruments are trusted by more than 20,000 customers worldwide in the pharmaceutical, materials, mining, and chemical industries.
Bettersize Inc., established in 2023, is our U.S. subsidiary. We have already successfully installed Bettersize instruments in over 150 North American laboratories. Our U.S. team is made up of seasoned experts in particle characterization, committed to providing hands-on, science-driven solutions for customers across North America.

Company Description

Strong product, technology, and marketing support from our Asia-based parent company, combined with a collaborative, start-up style team in the U.S. offering high growth potential.\r\nBettersize ( is a leading global provider of particle sizing and materials characterization solutions, headquartered in China with a 30-year history. Our instruments are trusted by more than 20,000 customers worldwide in the pharmaceutical, materials, mining, and chemical industries.\r\nBettersize Inc., established in 2023, is our U.S. subsidiary. We have already successfully installed Bettersize instruments in over 150 North American laboratories. Our U.S. team is made up of seasoned experts in particle characterization, committed to providing hands-on, science-driven solutions for customers across North America.