Senior Digital Design Engineer - HFC & Telecomm Systems

APPLIED OPTOELECTRONICS INC; Duluth, Northern (GA, KY); Hybrid; USD 120,000 - 180,000; Full time

Benefits offered by this job

Flexible health plans

401(k) match

Generous PTO

Relocation package

US immigration sponsorships

Job summary

APPLIED OPTOELECTRONICS INC in Duluth, GA is seeking a Staff Engineer – Digital Design to lead the design and development of digital subsystems for next-generation HFC amplifier platforms used in broadband and CATV networks.

The role focuses on architecting digital control systems, embedded processing, telemetry, and system integration within ruggedized outdoor amplifier platforms. Requires deep experience in digital hardware design, mixed-signal systems, and telecom infrastructure.

Qualifications

• Bachelor’s or Master’s degree in Electrical Engineering.
• Minimum 7 years of experience in digital hardware design.
• Experience designing mixed-signal systems in telecommunications or networking equipment.
• Strong expertise with microcontrollers, FPGAs, or SoC-based architectures.
• High-speed, multi-layer PCB design, signal integrity, and EMI/EMC mitigation.

Responsibilities

• Architect and design digital hardware subsystems for HFC amplifier platforms, including microcontrollers, FPGAs, ADC/DAC interfaces, Ethernet PHYs, and power monitoring circuits.
• Lead digital control strategy for gain alignment, automatic level control (ALC), monitoring, and remote diagnostics.
• Define system architecture integrating digital control, RF signal paths, power supplies, and environmental sensors.
• Develop detailed schematics, guide PCB layout for high-speed and mixed-signal designs, and ensure signal integrity and EMC compliance.
• Define telemetry, remote management, and field-upgrade capabilities for deployed amplifiers.
• Collaborate with RF, analog, firmware, mechanical, and manufacturing engineering teams.
• Drive design reviews, risk assessments, and technical decision-making across projects.
• Lead lab validation including signal integrity testing, hardware bring-up, compliance testing, and environmental qualification.
• Perform root-cause analysis of complex hardware issues and implement corrective actions.
• Support manufacturing transfer, DFM/DFT considerations, and field issue resolution.

Skills

Digital design

Mixed-signal

FPGA

SoC design

Microcontrollers

Ethernet interfaces

Education

Bachelor’s or Master’s degree in Electrical Engineering

Tools

Altium Designer

Job description

APPLIED OPTOELECTRONICS INC in Duluth, GA is seeking a Staff Engineer – Digital Design to lead the design and development of digital subsystems for next-generation HFC amplifier platforms used in broadband and CATV networks.

The role focuses on architecting digital control systems, embedded processing, telemetry, and system integration within ruggedized outdoor amplifier platforms. Requires deep experience in digital hardware design, mixed-signal systems, and telecom infrastructure.