Welcome! Our Growth is Creating Great Opportunities! Our team is expanding, and we want to hire the most talented people we can. Continued success depends on it! Once you've had a chance to explore our current open positions, apply to the ones you feel suit you best and keep track of both your progress in the selection process, and new postings that might interest you! Thanks for your interest in working on our team! Position Summary ADTRAN is seeking a Principal Hardware Engineer to provide technical leadership in the development of next-generation Optical Transport and Coherent Pluggable solutions for metro, core, long-haul, and data center interconnect applications. This role is responsible for the architecture, design, validation, and production support of advanced optical networking products, including coherent transceivers, DWDM systems, and optical transport platforms. The successful candidate will serve as a subject matter expert and collaborate across optical, electrical, firmware, FPGA, software, mechanical, manufacturing, and systems engineering teams to deliver innovative, high-performance networking solutions. Key Responsibilities Technical Leadership Lead the hardware architecture and design of coherent pluggable transceivers and optical transport subsystems. Drive technical decisions related to high-speed digital, RF, mixed-signal, and optical hardware design. Provide mentorship and technical guidance to engineers across multiple product development teams. Serve as the primary technical resource for complex engineering challenges and design reviews. Evaluate emerging technologies, components, and architectures to support future product roadmaps. Hardware Design & Development Develop system architectures, block diagrams, schematics, and detailed hardware specifications. Design and validate high-speed circuit boards supporting coherent optical communication systems. Lead signal integrity, power integrity, and electromagnetic compatibility analyses. Collaborate with PCB layout engineers to optimize designs for performance, manufacturability, reliability, and cost. Oversee hardware integration, verification, qualification, and release activities throughout the product lifecycle. Support new product introductions and production transfers to manufacturing partners. Optical Transport Systems Define and evaluate optical subsystem requirements including: Coherent pluggable modules DWDM transport systems Optical amplifiers ROADM technologies Wavelength-selective switches Laser and photodetector-based subsystems Perform system-level analysis, performance modeling, and design trade studies. Work with suppliers to evaluate and qualify optical components and technologies. Test & Validation Develop test strategies, qualification plans, and validation methodologies.

Utilize laboratory equipment including:

Network analyzers Spectrum analyzers BER testers Oscilloscopes Optical measurement equipment Analyze performance data and lead root-cause investigations. Drive corrective actions and continuous product improvements. Cross-Functional Collaboration Partner with Systems, Software, FPGA, Mechanical, Manufacturing, Quality, and Product Management teams. Participate in customer, supplier, and executive technical reviews. Support field deployments and resolution of complex customer issues when required. Ensure projects meet performance, schedule, reliability, and cost objectives. Required Qualifications Education Bachelor's degree in Electrical Engineering, Physics, Optical Engineering, or a related discipline required. Master's degree preferred. Equivalent combination of education and directly related industry experience will be considered in lieu of an advanced degree. Experience 10+ years of hardware engineering experience in telecommunications, networking, or optical communications. Significant experience designing high-speed electronic hardware and optical networking systems. Proven experience developing coherent optical transceivers, optical transport platforms, or DWDM networking products. Demonstrated success leading complex product developments from concept through production release. Technical Skills Expertise in coherent optical communications and pluggable transceiver technologies. Strong knowledge of DWDM transport systems and optical networking architectures. Experience with high-speed board design, signal integrity, and RF design techniques. Proficiency with schematic capture and simulation tools such as Xpedition, HFSS, ADS, HyperLynx, or equivalent.

Strong understanding of:

S-parameters Impedance matching High-speed serial interfaces Optical link budgets Mixed-signal design Experience with laboratory characterization and optical test equipment. Knowledge of manufacturing processes, Design for Manufacturability (DFM), Design for Testability (DFT), and product qualification methodologies. Leadership Competencies Strategic thinking and systems-level problem-solving ability. Strong communication, presentation, and stakeholder management skills. Ability to influence technical direction across multiple organizations. Proven coaching and mentoring capabilities. Strong project execution and decision-making skills. Ability to thrive in a fast-paced, collaborative engineering environment. Preferred Qualifications Master's or Ph.D. in Electrical Engineering, Optical Engineering, or Physics. Experience with coherent optical systems and pluggable architectures. Experience supporting hyperscale, carrier, or service provider optical networks. Familiarity with automation, scripting, and data analysis tools. Experience collaborating with global engineering and manufacturing teams.