Mechanical Engineer IV

Skip to ContentSearch JobsJob Search English (United States)Sign InMechanical Engineer IVReq #6090Buffalo, NY, USAApplyShareJob DescriptionPosted Monday, June 29, 2026 at 4:00 AMIf you are looking for a career at a dynamic company with a people-first mindset and a deep culture of growth and autonomy, ACV is the right place for you! Competitive compensation packages and learning and development opportunities, ACV has what you need to advance to the next level in your career.  We will continue to raise the bar every day by investing in our people and technology to help our customers succeed. We hire people who share our passion, bring innovative ideas to the table, and enjoy a collaborative atmosphere.  Who we are:  ACV is a technology company that has revolutionized how dealers buy and sell cars online. We are transforming the automotive industry. ACV Auctions Inc. (ACV), has applied innovation and user-designed, data driven applications and solutions. We are building the most trusted and efficient digital marketplace with data solutions for sourcing, selling and managing used vehicles with transparency and comprehensive insights that were once unimaginable. We are disruptors of the industry and we want you to join us on our journey. Our network of brands include ACV Auctions, ACV Transportation, ClearCar, MAX Digital and ACV Capital within its Marketplace Products, as well as, True360 and Data Services.At ACV we focus on the Health, Physical, Financial, Social and Emotional Wellness of our Teammates and, to support this, we offer: Multiple medical plans including a high deductible, low cost health plan  Company-sponsored (paid) Short-Term Disability, Long-Term Disability, and Life Insurance Comprehensive optional benefits such as Dental, Vision, Supplemental Life/AD&D, Legal/ID Protection, and Accident and Critical Illness Insurance Generous paid time off options, including uncapped vacation days, the greater of 3 paid sick days or in accordance with the applicable state or local paid sick leave law, 6 paid company holidays, 2 floating holidays, parental leave, bereavement leave, jury duty leave, voting leave, and other forms of paid leave as required by applicable law or regulation Employee Stock Purchase Program with additional opportunities to earn stock in the Company Retirement planning through the Company’s 401(k) Who we are looking for: An Engineer IV, Mechanical to lead the design, analysis, and physical integration of complex mechanical systems and hardware onto our next-generation platforms. You will serve as a technical anchor, bridging R&D prototypes with production-ready systems, and taking full ownership of subsystems from concept through to validation and deployment. As a senior member of the team, you will act as a hands-on mentor to junior engineers, establish design standards, and collaborate cross-functionally to deliver highly reliable, high-performance mechanical solutions that can survive demanding real-world environments. What you will do: Lead the mechanical engineering efforts for structural design, integration of hardware, and subsystem packaging from initial ideation through to final drawing release. Own the evolution of early-stage R&D concepts and custom retrofits into scalable, high-reliability, production-ready systems, ensuring designs meet structural, environmental, and safety standards. Execute finite element analyses (FEA) and first-order hand calculations to validate designs against static, dynamic, modal/vibration, and thermal use cases. Lead, mentor, and grow the mechanical engineering discipline by establishing best practices, standardizing workflows, conducting deep-dive design reviews, and guiding junior engineers. Optimize designs for manufacturing, assembly, and serviceability (DFM/DFA/DFS), collaborating closely with manufacturing, procurement, and external vendors. Pack and physically integrate sensors (cameras, LiDAR, radar, IMUs), compute units, and ancillary equipment,...