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Neptune Medical

At-home fertility diagnostics and non-invasive device

Senior NPI Process Development Engineer

Full-Time
$140k - $175k/yr+ Equity + 401(K) with matching
Mid, Senior
Bachelor's, Master's
Burlingame, CA, USA
In Person
Manufacturing & Process EngineeringManufacturing Engineering

About the job

Requirements
  • The candidate must have a B.S. or M.S. in Mechanical Engineering or a related engineering field.
  • The candidate must have 4 or more years of work experience.
  • The candidate must have demonstrated experience working with cross functional teams.
  • The candidate must have a proven track record of generating and managing manufacturing documentation from concept to commercialization for a medical device product including manufacturing process instructions, laboratory history records, bill of materials, flowcharts, and other related documents.
  • The candidate must be capable with computer aided design modeling, engineering drawing generation, design for manufacturability, tolerance analysis and tooling design.
  • The candidate must possess knowledge of process validation, Good Manufacturing Practice, and state-of-the-art manufacturing processes.
  • The candidate must have a driven outlook and a strong desire to succeed as an engineer, as a team, and as a company.
  • The candidate must have a solid understanding of design controls.
  • The candidate must have demonstrated success developing catheter manufacturing processes including braiding, coil winding, extrusion, lamination, adhesive joining, die bonding, and laser welding.
Responsibilities
  • Work with product development to design and prototype novel manufacturing processes and equipment.
  • Develop new processes to manufacture the company’s products to meet device performance and cost targets.
  • Design and prototype novel manufacturing equipment and fixturing.
  • Create and maintain necessary Manufacturing Process Instructions, test methods, product drawings, and component specifications.
  • Upgrade manufacturing processes to ensure proper design for manufacturability and maximum scalability of medical devices.
  • Initiate and implement programs to continuously improve quality, cost and cycle time.
  • Prototype fixtures using 3-D printing equipment and traditional fabrication tools such as lathe, drill press, and band saw.
  • Provide technical support and perform failure analysis for non-conforming components, assemblies, and process defects.
  • Build the assembly line for clinical launches.
  • Specify, support and maintain the proper controlled environment to manufacture medical devices under defined environmental quality controls.
  • Manage the flow of work-in-process through Lean practices including Kanban and 5S.
  • Maintain relationships with key vendors and suppliers and support supplier validations and supplier management best practices.
  • Emphasize quality and utilize a risk-driven approach to ensure compliance with risk management policies and practices and ensure Good Manufacturing Practice.
  • Support company goals and policies that comply with FDA Quality System Regulations, ISO 13485, and other applicable domestic regulations including California Food and Drug, Occupational Safety and Health Administration and Cal-OSHA.
Desired Qualifications
  • Experience with catheter or similar manufacturing such as lamination, bonding, dip coating, ultrasonic welding.
  • Experience with disposables or consumables.
  • Experience managing laboratory technicians and assemblers.
  • Developed products from invention to market release.
  • Experience in a start-up environment.
  • Proficient with SolidWorks.
  • Experience creating and managing schedules, budgets, and plans.
  • Experience with packaging and shipping validations.

About the company

Neptune Medical develops devices and tests to address male infertility. Its two main products are Pro-Test, an at-home diagnostic kit that lets individuals test fertility parameters from home, and Neptune, a non-invasive device designed to improve sperm quality. Pro-Test provides a convenient way to assess fertility without clinic visits, while Neptune uses a proprietary, non-invasive method to enhance key sperm metrics and is intended for home use alongside clinical fertility treatment. The company serves both clinics (B2B) and individual consumers (B2C) and markets its products to help diagnose and treat male infertility, a factor in about half of all infertility cases. Neptune Medical differentiates itself by offering integrated, consumer-accessible diagnostics and treatment tools, backed by grant funding and participation in precision medicine programs, aiming to make diagnosis and treatment more private, accessible, and effective.

Company Size

1-10

Company Stage

Series D

Total Funding

$97M

Headquarters

Burlingame, California

Founded

2016

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Simplify's Take

What believers are saying

  • FDA clearance on September 16, 2026 unlocks U.S. hospital purchasing cycles.
  • Neptune expanded headcount to 155 employees by March 2026, supporting commercialization.
  • 2026 hiring and DDW study momentum signal active physician interest and pipeline execution.

What critics are saying

  • No public evidence shows meaningful revenue from Triton by October 5, 2026.
  • Pathfinder still is not available for sale outside the United States on October 3, 2026.
  • A missed commercial rollout for Triton would strand Neptune’s $97 million platform investment.

What makes Neptune Medical unique

  • Dynamic Rigidization makes Neptune’s scope control mechanically distinct from standard endoscopy.
  • Triton 1 won FDA clearance on September 16, 2026 for colon procedures.
  • Pathfinder reached 15,000 patients, proving clinical adoption before Triton’s launch.

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Benefits

  • 401(k) Company Match
  • Company Equity

Company News

The Robot Report
Oct 4th, 2024
Robotics Investments Near $1B In August

Listen to this articleSwiss-Mile raised $22M in August 2024 for its wheeled quadruped. Fifty producers of robots and robotics enabling technologies received funding in August 2024, pulling in a total of approximately $1 billion. This figure is on par with the $1.2 billion average The Robot Report has tracked each of the previous 12 months. Investment targeted to robotics companies for the first eight months of 2024 equals about $10.86 billion. You can follow The Robot Report‘s investment section here. The largest investments in August were secured by developers of autonomous driving technologies

Business Wire
Aug 17th, 2024
Neptune Medical Announces $97M Series D Financing and Spinout of Jupiter Endovascular

Neptune Medical announces $97 million in Series D financing, along with the spinout of its Jupiter Endovascular subsidiary.