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# Senior Software Engineer

- **Company:** Onto Innovation
- **Location:** Mount Olive, NJ, United States
- **Experience:** Expert
- **Salary:** $86,400 - $129,600
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Unit Testing, C Sharp (Programming Language), Client Server Models, Code Review, Communications Protocols, Software Debugging, Software Design Patterns, Graphical User Interface, Windows Communication Foundation, Windows Presentation Foundation, Software Architecture, Software Engineering, Systems Integration, TCP/IP, Git, Information Technology, Software Version Control
- **Published:** November 7, 2026
- **Apply:** https://www.careerjet.com/job/us0f62abe9091934124f3bb7d163ae69b6/eaa

## About the Role

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.

## Description

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.
Must be able to travel internationally to customer sites at least 20% of the time, with additional travel as business needs require.