[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Coherent jobs](https://jobs.opennash.com/companies/coherent/) · [Search jobs](/search/) Coherent · Santa Clara, CA # Principal Software Engineer Santa Clara, CA, United States On-site Senior individual contributor Software Engineering Listed on Coherent’s official careers site. Posted June 20, 2026. Check that it is still open and apply there. [Apply on Coherent’s careers site →](https://hcwp.fa.us2.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_1/job/2012915) [OpenNash Jobs](https://jobs.opennash.com/) / [Coherent](https://jobs.opennash.com/companies/coherent/) / Principal Software Engineer ## Job description ### Primary Duties & Responsibilities Work with internal customers to define the automated process and system specifications. Understand and document customers’ requirements and reach agreements with customers. Work with hardware engineering colleagues to design/select suitable key parts as part of system conception design. Create software architecture as part of system conception design. Assess software-related risks with necessary mitigations. Develop software and coding based on software architecture. Test new developed modules if feasible. Simulate environment to verify key algorithms. Finish the whole software coding within the pre-defined schedule. Set up PC and install necessary software and hardware drivers. Make each control module functional individually. Debug software to make each functional unit work properly. Integrate system to make the whole auto sequence as defined. Work with hardware engineering colleagues to continuously trial run the system and improve and verify the system reliability. Install the system on the production floor and work with the customer to qualify the system. Support the production and trouble-shooting system issues if needed. ### Education & Experience 15+ yrs. of software engineering experience in automated process and test systems development is must. Skilled in the use of software development language such as C#, C, C++. Knowledge of optical communication technology is preferred. Skills & Other Requirements Expert in the design and developing software for automated assembly and test systems for optical data communication related product manufacturing, such as transceivers, OCS, and CPO. Proficient in motion control and machine vision technology applications. Familiar with deep learning technology application is a plus. Ability to develop regular automation projects independently. Ability to work closely with colleagues from various fields. Excels in a high teamwork sprit across teams, departments, and sites. Able to support a flexible work schedule due to the needs of collaboration with multiple facility’s customers and colleagues. ### Working Conditions 8-hour shift 8 AM to 5 PM. May need to work on some irregular hours, such as earnings and weekends, for urgent production support. Must be able to function in a fast-paced environment, carrying out multiple projects at a time. Candidate may need to occasionally travel overseas to customer site for system transfer or support. Physical Requirements Able to work in a clean room environment when needed. Safety Requirements All employees are required to follow the site EHS procedures and Coherent Corp. Corporate EHS standards. Quality and Environmental Responsibilities Depending on location, this position may be responsible for the execution and maintenance of the ISO 9000, 9001, 14001 and/or other applicable standards that may apply to the relevant roles and responsibilities within the Quality Management System and Environmental Management System. Culture Commitment Ensure adherence to company’s values (ICARE) in all aspects of your position at Coherent Corp.: I ntegrity - Create an Environment of Trust C ollaboration - Innovate Through the Sharing of Ideas A ccountability - Own the Process and the Outcome R espect - Recognize the Value in Everyone E nthusiasm - Find a Sense of Purpose in Work Coherent Corp. is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law. If you need assistance or an accommodation due to a disability, you may contact us at talentacquisition@coherent.com. ## At a glance - Posted by the employer: Jun 20, 2026 - First seen by OpenNash: Jul 10, 2026 - Last checked: Oct 18, 2026 - Listed for: 120 days - Location: Santa Clara, CA, United States - Work arrangement: On-site[Apply on Coherent’s careers site →](https://hcwp.fa.us2.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_1/job/2012915) ## More jobs at Coherent ### [Assistant General Counsel, M&A](https://jobs.opennash.com/companies/coherent/jobs/cae86c44c106e60dd9e7/) Santa Clara, CA, United States ### [Cybersecurity Engineer (Bay Area Preferred)](https://jobs.opennash.com/companies/coherent/jobs/3ad7907f19c80f779818/) Santa Clara, CA, United States ### [Director of Construction and Real Estate](https://jobs.opennash.com/companies/coherent/jobs/c638e05e544ec46577c8/) Santa Clara, CA, United States ### [Director of Customer Program Management](https://jobs.opennash.com/companies/coherent/jobs/4316b76db6d61602b991/) Santa Clara, CA, United States ### [Director of Strategic Supply Chain](https://jobs.opennash.com/companies/coherent/jobs/f324c876587f74503f7f/) Santa Clara, CA, United States ## Similar jobs at other companies ### [Lead Principal Platform Software Engineer](https://jobs.opennash.com/companies/oracle/jobs/b43f2a5ac21c3d691d93/) Oracle · Santa Clara, CA, United States ### [Principal Software Engineer – Mobile Software Architecture](https://jobs.opennash.com/companies/qualcomm/jobs/914589d5d4db917886f4/) Qualcomm · San Diego, California, United States of America ### [Principal Software Engineer](https://jobs.opennash.com/companies/jpmorganchase/jobs/43ddee4b84a577509be8/) JPMorganChase · Seattle, WA, United States ### [Principal Software Engineer](https://jobs.opennash.com/companies/microsoft/jobs/a9b185ca099e0387fa97/) Microsoft · United States, Washington, Redmond OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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