Engineer Principal, Electrical

Lumentum Operations LLC; Hong Kong; On-site; HKD 900,000 - 1,200,000; Full time

Job summary

Lumentum is seeking a Principal Electrical Engineer to join our Hong Kong-based Product Development team. You will lead the full lifecycle for high-speed fiber-optic transceivers, driving circuit schematic design, PCB layouts, and manufacturing documentation with cross-functional partners.

Strong hands-on hardware validation, DFx collaboration with suppliers, and advanced SI/PI simulations will shape next‑gen transceivers. Proficiency in English and Cantonese/Mandarin is required.

Qualifications

• Master's or Bachelor's degree in Electronic Engineering, Applied Physics, or a closely related discipline.
• Fluent English and Chinese (Cantonese and/or Mandarin) preferred.

Responsibilities

• Participate actively in the full product development lifecycle for high-speed fiber-optic transceivers.
• Design circuit schematics and develop substrate/PCB layouts, generating manufacturing documentation.
• Collaborate with PCB/substrate/FPC suppliers, conducting DFM reviews.
• Perform SI/PI simulations and optimize based on results.
• Conduct EVT/DVT and failure analysis for transceiver products.
• Evaluate new electronic devices/components for future products.

Skills

Schematic design

PCB layout

RF/high-speed design

HDI/mSAP knowledge

DFM reviews

Signal integrity

Power integrity

EVT/DVT testing

Hardware debugging

BOM documentation

Cadence OrCAD/Allegro

AutoCAD

LTspice

HFSS

ADS

VNA

Education

Master's or Bachelor's in Electronic Engineering

Tools

Cadence OrCAD/Allegro

AutoCAD

LTspice

HFSS

ADS

SIwave

VNA

Job description

It's fun to work in a company where people truly BELIEVE in what they're doing! We're committed to bringing passion and customer focus to the business. If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us! Lumentum is seeking a talented Engineer Principal, Electrical to join our Hong Kong-based Product Development team.

Key Responsibilities:

• Participate actively in the full product development lifecycle for high-speed fiber-optic transceivers.
• Design circuit schematics and develop substrate/PCB layouts, generating associated manufacturing documentation.
• Collaborate with PCB/substrate/FPC suppliers, conducting Design for Manufacturability (DFM) reviews.
• Perform signal integrity (SI) and power integrity (PI) simulations and implement optimizations based on results.
• Conduct Engineering Validation Testing (EVT), Design Validation Testing (DVT), and failure analysis for transceiver products.
• Evaluate new electronic devices and components for potential use in future products.

Requirements:

Knowledge:

• Comprehensive understanding of the circuit schematic design and PCB layout workflow.
• Proficiency in RF/high-speed and power layout strategies for multi-layer boards.
• Familiarity with serial communication protocols (e.g., I2C, SPI, UART, MDIO) for MCU-peripheral interfacing.
• Deep understanding of High-Density Interconnect (HDI), Semi-Additive Process (SAP) and modified Semi-Additive Process (mSAP) manufacturing techniques for PCBs, substrates, and FPCs.

Solid Experience In:

• Designing electronic circuit schematics and performing PCB layouts for products incorporating analog/mixed-signal, power management, and MCU control circuits.
• Preparing comprehensive manufacturing documentation including PCB files, Bill of Materials (BOM), and PCBA assembly instructions.
• Conducting technical DFM discussions and reviews with PCB suppliers.
• Selecting electronic components based on product reliability requirements and specifications.
• Hands-on hardware validation, debugging, and root cause failure analysis.
• Performing circuit simulation, including power integrity and signal integrity analysis.

Essential Skills:

• Proficiency with EDA tools: Cadence OrCAD and Allegro.
• Experience with CAD software: Autodesk AutoCAD.
• Ability to import and handle 3D CAD models within the PCB design process.
• Competence with simulation tools: LTspice, ANSYS HFSS, ANSYS SIwave, Keysight ADS (or equivalent).
• Skilled in using electronic loads, power probes, and oscilloscopes for power and ripple measurements.
• Skilled in using oscilloscopes and multimeters to evaluate mixed-signal circuits (ADC, DAC, IDAC, TEC drivers, etc.).

Preferred Knowledge, Experience, and Skills (Advantageous but Optional):

• Experience with other layout/CAD software (e.g., PADS, Altium Designer, Polar Instruments, PTC Creo, SolidWorks).
• Strong experience in detailed power circuit design (e.g., high-efficiency converters, complex power distribution) and advanced power integrity (PI) simulation.
• Experience with power electronics handling >30W at low voltages (e.g., 3.3V or below).
• Knowledge of advanced high-speed/RF interconnect and trace design techniques.
• Understanding of NRZ, PAM4, or similar physical layer differential signalling for high-speed digital communication.
• Fundamental knowledge of optoelectronics.
• Experience of performing RF measurements using a Vector Network Analyzer (VNA).
• Experience of performing high-speed digital oscilloscope (e.g., Keysight's (DCA) Digital Communication Analyzers).

Required Qualifications:

• Master's or Bachelor's degree in Electronic Engineering, Applied Physics, or a closely related discipline.
• Good command of both spoken and written English and Chinese (Cantonese and/or Mandarin).

Other Requirements:

• Passionate about electronic engineering, demonstrating a proactive and fast-learning attitude.
• Ability to work independently, manage priorities, and perform effectively under pressure.
• Willingness to collaborate within a multi-cultural and multi-national team environment.
• Must be willing and able to travel occasionally to Mainland China and potentially overseas for technical support and supplier collaboration.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status. We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.

Lumentum is illuminating the networks of tomorrow with advanced photonic technologies that enable AI, data centers, telecom, industrial, and sensing applications. As AI accelerates the global demand for bandwidth and energy efficiency, we deliver the building blocks that keep data moving reliably, efficiently, and at massive scale. Our optical products support AI and compute infrastructure, cloud and DCI environments, metro and long-haul networks, while our lasers drive breakthroughs in precision manufacturing and sensing. For nearly five decades, Lumentum has been at the intersection of light and innovation. What began as a vision with JDS Uniphase to harness the power of photonics has evolved into a global force driving the communication infrastructure of tomorrow. At Lumentum, we’re building more than a business—we’re building a team of passionate innovators whose drive to collaborate, create, and connect the world fuels everything we do. We are part of the AI technology revolution and we are illuminating the path forward. Headquartered in San Jose, California, we operate worldwide through a network of R&D, manufacturing, and sales locations.