Senior Development Engineer

Onto Innovation is a leader in process control, combining global scale with an expanded portfolio of leading-edge technologies that include: 3D metrology spanning the chip from nanometer-scale transistors to micron-level die-interconnects; macro defect inspection of wafers and packages; metal interconnect composition; factory analytics; and lithography for advanced semiconductor packaging. Our breadth of offerings across the entire semiconductor value chain helps our customers solve their most difficult yield, device performance, quality, and reliability issues. Onto Innovation strives to optimize customers' critical path of progress by making them smarter, faster and efficient.

Job Summary & Responsibilities

Job Summary At Onto Innovation, you will play a key role in developing next-generation semiconductor metrology and inspection systems that require industry-leading positioning accuracy, throughput, and stability. As a Senior Development Engineer – Motion Control & System Dynamics, you will lead the development, analysis, and optimization of precision motion systems that enable nanometer-level performance in advanced semiconductor equipment. You will work at the intersection of controls engineering, dynamics, mechatronics, precision mechanics, and system integration. Your expertise will be instrumental in characterizing machine dynamics, tuning high-performance control systems, optimizing stage performance, and developing calibration methodologies that maximize equipment accuracy and productivity. The ideal candidate is a hands-on technical expert with deep knowledge of motion control, frequency-domain analysis, system identification, and dynamic behavior of precision equipment.

Key Responsibilities

• Lead the development, analysis, and optimization of precision motion systems for semiconductor metrology and inspection equipment.
• Characterize machine and stage dynamics through experimental measurements, system identification, and analytical modeling.
• Measure and analyze frequency response functions (FRFs), transfer functions, coherence, disturbance spectra, and closed-loop performance metrics.
• Develop, tune, and optimize motion control strategies, including: PID control Feedforward control Disturbance rejection Trajectory optimization.
• Perform controller tuning and performance validation to achieve demanding requirements for settling time, tracking accuracy, throughput, and stability.
• Conduct modal testing and modal analysis to identify structural resonances and visualize system dynamic behavior.
• Collaborate with mechanical engineers to improve system performance through optimized structural and dynamic design.
• Develop and implement machine, stage, and sensor calibration methodologies to improve positioning accuracy and measurement performance.
• Support root-cause analysis of machine performance issues related to vibration, servo behavior, structural dynamics, and system integration.
• Use simulation and modeling tools to predict dynamic performance and guide design improvements.
• Collaborate cross-functionally with mechanical, optical, electrical, software, systems, and algorithm teams to develop fully integrated solutions.
• Create technical documentation, test procedures, performance reports, and calibration workflows.
• Provide technical leadership, mentor junior engineers, and contribute to motion control technology roadmaps.

Qualifications

• MSc or PhD in Control Engineering, Mechanical Engineering, Mechatronics, Aerospace Engineering, Applied Physics, Electrical Engineering, or a related field.
• 8+ years of experience developing high-performance motion control systems.
• Strong expertise in: Motion control systems Servo tuning Frequency-domain analysis System identification Dynamic modeling Machine calibration Hands-on experience measuring and interpreting: Frequency response functions (FRFs) Bode plots Nyquist plots Time-domain and frequency-domain performance metrics Experience tuning feedback and feedforward control loops for precision motion systems. Strong understanding of system dynamics, vibration, resonance, damping, and disturbance rejection techniques. Experience performing modal testing and modal analysis.
• Proficiency with MATLAB/Simulink and engineering analysis tools.
• Experience working in cross-disciplinary engineering teams.
• Demonstrated ability to independently drive technical investigations and deliver results.
• Must be able to travel internationally to customer sites at least 20% of the time, with additional travel as business needs require.
• Experience performing structural dynamic simulations and Finite Element Analysis (FEA/FEM) is preferred.

Why Join Onto Innovation?

At Onto Innovation, we believe your work should matter—and so should your well-being. That's why we offer competitive salaries and a comprehensive benefits package designed to support you and your family. From health, dental, and vision coverage to life and disability insurance, PTO, and a 401(k) with employer match, we've got you covered. You'll also enjoy access to our Employee Stock Purchase Program (ESPP), wellness initiatives, and cutting-edge tools - all within a collaborative, inclusive culture where your contributions are valued and recognized.

Compensation & Growth

• Base Salary Range: $115,200.00 - $172,800.00, offered in good faith and based on experience, location, and qualifications.
• Additional Rewards: Annual bonus opportunities and potential long-term incentives tied to both company and individual success.

Empowering Every Voice to Shape the Future

Onto Innovation is committed to creating a workplace where every qualified candidate has an equal opportunity to succeed. We evaluate applicants based on skills, experience, and potential - without regard to race, color, religion, gender, sexual orientation, national origin, age, disability, veteran status, or any other characteristic protected by law. We believe diversity of thought and background drives innovation and strengthens our team.

Important Note on Export Compliance

For certain positions requiring access to technical data, U.S. export licensing review may be necessary for applicants who are not U.S. Citizens, Permanent Residents, or other protected persons under 8 U.S.C. 1324b(a)(3). Onto Innovation is a leader in process control, combining global scale with an expanded portfolio of leading-edge technologies that include: 3D metrology spanning the chip from nanometer-scale transistors to micron-level die-interconnects; macro defect inspection of wafers and packages; metal interconnect composition; factory analytics; and lithography for advanced semiconductor packaging. Our breadth of offerings across the entire semiconductor value chain help our customers solve their most difficult yield, device performance, quality, and reliability issues. Onto Innovation strives to optimize customers' critical path of progress by making them smarter, faster and efficient.

Headquartered in Wilmington, Massachusetts, Onto Innovation supports customers with a worldwide sales and service organization. Additional information can be found at