Principal Engineer - Driver Development

Primary Duties & Responsibilities

• Design, develop, and maintain C#/.NET-based device drivers and control software for hardware modules used in automated test systems.

• Architect scalable driver frameworks to support multiple hardware revisions and device configurations.

• Implement robust communication layers (USB, UART, SPI, I2C, Ethernet, or custom interfaces) between host applications and embedded hardware.

• Ensure drivers support high reliability, deterministic behavior, and safe hardware interaction in production test environments.

• Develop reusable driver libraries and APIs for integration with test automation frameworks and system software.

• Work closely with STM32 microcontroller-based boards to develop and validate host-side control drivers.

• Interface with embedded firmware teams to define communication protocols, command structures, and data exchange mechanisms.

• Support firmware bring-up activities by validating register-level communication and device control sequences.

• Understand microcontroller peripherals such as ADC, DAC, GPIO, PWM, SPI, I2C, and UART for driver integration.

• Utilize laboratory instrumentation to support debugging and validation activities, including and not limited to Oscilloscopes, Digital Communication Analyzers (DCA), Power supplies, Power meters, Network analyzers.

• Perform signal integrity checks, timing measurements, and power characterization during system validation.

• Correlate hardware measurements with software logs to identify system issues.

• Apply best practices in software architecture, code quality, and maintainability for long-term product support.

• Identify opportunities to improve test automation, system reliability, and development efficiency.

• Contribute to the evolution of driver frameworks and testing infrastructure used across the organization.

Education & Experience

• Bachelor’s degree in electrical engineering, Electronics & Communication Engineering, Instrumentation Engineering, or a related discipline from a recognized university.

• Master's degree in Embedded Systems, Electronics, or Computer Engineering is an advantage.

• Minimum 8 years of professional experience in device driver development, test system software development, or embedded system integration.

• Hands-on experience working in the Test & Measurement domain, preferably in industries such as:

• Semiconductor testing

• Optical communications

• Electronic manufacturing

• Automated test equipment (ATE) systems

• Experience designing and implementing automated test routines and diagnostic tools.

• Understanding of measurement techniques, calibration processes, and data acquisition systems.

• Basic to intermediate knowledge of embedded firmware development, preferably with microcontrollers such as STM32 or similar platforms.

• Familiarity with firmware debugging, boot processes, and embedded communication protocols.

• Understanding of how host software interacts with embedded firmware through command interfaces or control protocols.

• Exposure to optical communication systems and optical transceiver testing is highly desirable.

• Familiarity with optical test setups involving:

• Optical power measurements

• Signal integrity validation

• High-speed interface testing

• Understanding of optical module characterization and validation workflows.

Skills

• Strong work ethic combined with excellent communication skills.

• Ability to work independently with minimal supervision as well as collaboratively within a team.

• Adaptable and flexible, with the capability to thrive in a cross-functional, cross-cultural, global team environment.

Working Conditions

• The work mode of Finisar Test Development Department, India is Mandatory 5 days at office.

Culture Commitment

Ensure adherence to company’s values (ICARE) in all aspects of your position at Coherent Corp.:

Integrity – Create an Environment of Trust

Collaboration – Innovate Through the Sharing of Ideas

Accountability – Own the Process and the Outcome

Respect – Recognize the Value in Everyone

Enthusiasm – 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.

Finisar India (Subsidiary of Coherent Corp) is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to gender identity, sexual orientation, race, color, religion, national origin, disability, or any other characteristic protected by law.