Senior Software Engineer

Job Summary & Responsibilities

We are seeking a highly skilled Senior Software Engineer to design, develop, and optimize low-level software components that power our next-generation systems. In this role, you will be engaged throughout the full software development lifecycle—from gathering and analyzing customer requirements to designing, implementing, and debugging software for advanced equipment in the semiconductor industry.

Design, develop, and maintain robust .NET applications using C# and WPF. Collaborate with cross-functional teams to translate customer needs into technical requirements. Implement client-server communication using WCF, TCP/IP, and other protocols. Develop and integrate low-level hardware control interfaces via TCP/IP, serial, or other communication protocols. Participate in code reviews, unit testing, and system integration. Contribute to the continuous improvement of software architecture and development processes.

Qualifications

• Bachelor's or Master's degree in Computer Science, Mathematics, Physics, or a related Engineering discipline.
• 5+ years of professional software development experience, with strong proficiency in .NET and C#.
• Solid understanding of object-oriented programming (OOP) principles, software architecture, and design patterns.
• Hands-on experience with motion control systems and metrology tools.
• Experience designing and developing graphical user interfaces (GUI) using WPF.
• Proficiency in client/server communication technologies, including WCF and TCP/IP.
• Experience interfacing with hardware using various communication protocols.
• Familiarity with SEMI industry standards and semiconductor equipment software integration.
• Working knowledge of Agile/Scrum development methodologies and source control tools such as Git.
• Excellent communication, collaboration, problem-solving, and time management skills.

Why Join Onto Innovation?

• 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: $86,400.00 - $129,600.00, 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 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 more efficient.

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 more efficient.

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