Full-Time

Senior Research and Development Sustaining Engineer

Instruments

Posted on 9/9/2025

Calyxo

Calyxo

201-500 employees

Develops and markets kidney stone devices

No salary listed

Pleasanton, CA, USA

In Person

Category
Mechanical Engineering (5)
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Required Skills
GD&T
Autodesk CFD
SolidWorks
Requirements
  • Bachelor’s degree in Mechanical Engineering, Biomedical Engineering, or a related field
  • 5+ years of medical device experience (4+ with an advanced degree).
  • Understanding of medical device regulations, including ISO 13485 and FDA 21 CFR Part 820.
  • Ability to apply DFX principles to create designs that can scale.
  • Proficiency in SolidWorks and a strong understanding of design for manufacturability, tolerance stack analysis, and GD&T.
  • Track record of taking design concepts from prototyping stage through to design maturation.
  • Proven design capabilities in two or more of the following key areas: injection molding, electro-mechanical sub-systems, catheter construction, endoscope construction, fluidics.
  • Experience creating and running simulations (CFD, FEA) to inform product development.
  • Solid experience conducting structured design of experiments (DOEs) and using statistical methods to analyze data.
  • Strong collaboration and communication skills, with the ability to work effectively on cross-functional teams.
  • Strong problem-solving and analytical skills, with a hands-on approach to product development and testing.
  • Compliance with relevant county, state, and Federal rules regarding vaccinations.
Responsibilities
  • Lead and inform the design, development and qualification strategy for design-related product enhancements and line extensions in response to internal and/or external feedback.
  • Lead design-related root cause analysis efforts, and drive corrective and preventive actions.
  • Serve as an R&D SME for projects lead by cross-functions, and partner with cross-functional teams to gain alignment on qualification strategies.
  • Create prototypes, design fixturing, devise feasibility studies, and execute testing to draw meaningful conclusions and guide product development.
  • Collaborate with the Post-Market Surveillance team to support effective root cause analysis of device issues returning from the field.
  • Ensure design and development pathways maintain adherence to the design control process, working with cross-functional partners to enable manufacturability, reliability, and scalability.
  • Use SolidWorks to create well-defined models, assemblies, and engineering drawings.
  • Support the generation of new or revised product requirements and engineering specifications.
  • Create and execute protocols, and author associated reports and risk documentation, developing and validating new test methods as needed.
  • Effectively communicate project progress, results, and risks to relevant stakeholders.
  • Coordinate external testing activities such as sterilization, packaging, and biocompatibility testing as needed, ensuring alignment with project goals and timelines.

Calyxo, Inc. develops medical devices for kidney stone treatment. Its products are designed for use by urologists in hospitals and clinics to treat kidney stones more effectively, prioritizing patient safety and efficient procedures. The company works closely with leading U.S. urologists to translate clinical needs into devices, focusing on making treatments safer and easier for clinicians. Unlike some competitors, Calyxo emphasizes clinician collaboration and proven clinical relevance in its device development, backed by leadership with startup and product-launch experience. The goal is to improve patient care by delivering advanced devices that help urologists achieve better clinical outcomes and expand the devices’ reach through commercialization to healthcare providers.

Company Size

201-500

Company Stage

Series F

Total Funding

$137.2M

Headquarters

Pleasanton, California

Founded

2016

Simplify Jobs

Simplify's Take

What believers are saying

  • Series F raised $40M led by Ally Bridge Group and Janus Henderson Investors.
  • CVAC system treated over 40,000 patients, advancing toward standard of care.
  • ASPIRE study at AUA showed superior clearance independent of stone burden in 101 patients.

What critics are saying

  • Boston Scientific's LithoClast Trilogy erodes market share via hospital contracts in 12-24 months.
  • Cook Medical's NGage basket undercuts CVAC pricing by 30% in 12-18 months.
  • FDA Class I recall triggers withdrawal due to 5% ureteral perforation risks in 3-9 months.

What makes Calyxo unique

  • CVAC System integrates ureteroscopy, laser lithotripsy, irrigation, and aspiration in one device.
  • SURE procedure with CVAC achieves 97% volumetric stone clearance versus standard URS.
  • Redesigned CVAC received FDA clearance in March 2024 for minimally invasive treatment.

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Benefits

Health Insurance

401(k) Retirement Plan

401(k) Company Match

Paid Vacation

Stock Options

Growth & Insights and Company News

Headcount

6 month growth

1%

1 year growth

2%

2 year growth

8%
StreetInsider
Apr 14th, 2026
Calyxo raises $40M Series F as CVAC kidney stone system treats 40,000 patients

Calyxo, a medical device company focused on kidney stone treatment, has closed a $40 million Series F financing round led by Ally Bridge Group and Janus Henderson Investors. Questa Capital, Avidity Partners and CRG also participated. The funding follows a milestone of 40,000 patients treated with Calyxo's CVAC System, an aspiration-based stone removal device. The system uses irrigation and vacuum aspiration to continuously clear stone fragments during procedures, enabling more complete stone clearance. Proceeds will support commercial expansion, clinical evidence generation through ongoing studies evaluating long-term outcomes, and continued innovation in kidney stone care. The CVAC System received FDA clearance in 2024 and is positioned as an all-in-one solution for minimally invasive kidney stone removal.

Business Wire
May 14th, 2024
Study Presented At Aua Shows Superior Kidney Stone Clearance Rates For Sure Procedure Using Calyxo’S Cvac System Vs Standard Urs

PLEASANTON, Calif.--(BUSINESS WIRE)--Calyxo, Inc., a medical device company developing innovative solutions for patients with kidney stones, has announced that positive study results for its CVAC System were presented last week at the American Urological Association (AUA) Annual Meeting in San Antonio. The CVAC System, a revolutionary technology that is designed for complete kidney stone removal, was the focus of the prospective, randomized, multi-center ASPIRE study, which compared the safety and efficacy of steerable ureteroscopic renal evacuation (SURE) vs ureteroscopy (URS) with basketing. The 30-day results of the ASPIRE study were presented at the AUA Meeting by urologist Thomas Chi, MD of the University of California, San Francisco. In 101 patients, SURE demonstrated statistically superior stone clearance and significantly lower residual stone volume compared to standard URS. Unlike standard URS, the CVAC System achieved these results independent of baseline stone burden. Safety was comparable between groups

Business Wire
Mar 26th, 2024
Calyxo Announces Fda Clearance For New, Redesigned Cvac System

PLEASANTON, Calif.--(BUSINESS WIRE)--Calyxo, Inc., a medical device company developing innovative solutions for patients with kidney stones, announced that it has received FDA clearance for its new, redesigned CVAC System, which enables a minimally invasive approach to kidney stone treatment. More than 50 procedures have already been completed by 12 urologists with the new CVAC System, yielding strong patient outcomes and consistently positive physician feedback. Clinical studies have shown that residual stone fragments are associated with a 20%-44% incidence of post-procedure problems, including pain, infection, emergency department visits, hospitalization and need for retreatment. Steerable ureteroscopic renal evacuation (SURE) using the original CVAC Aspiration System has been used to successfully treat more than 1,500 patients in the U.S., demonstrating that vacuum aspiration of stone fragments improves clinical outcomes, with 97% volumetric stone clearance and a high likelihood of avoiding the need for a secondary or more invasive procedure (according to clinical study data collected in patients treated with the device)

FinSMEs
Dec 12th, 2023
Calyxo Raises $50M in Series D Funding

Calyxo, a Pleasanton, CA-based medical device company developing next-generation treatment solutions for patients with kidney stones, raised $50M in Series D funding.

Questa Capital
Jul 6th, 2022
Questa Capital invests into Calyxoinc in $32.7M

Calyxo, Inc., a medical device company focused on improving care for patients with kidney stones by delivering next generation treatment solutions, has announced the closing of a $32.7 million Series C financing round led by Questa Capital and CRG.

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