Principal Signal Integrity Engineer

Location: Gyeonggi-Do, Korea; onsite full-time

Company

hirify.global provides semiconductor test and measurement technologies and services across the product life cycle, including characterization, reliability, design debugging, qualification, and production testing.

What you will do

• Perform signal and power integrity analysis for high-speed interconnects across PCBs, packages, MLOs, and probe cards.
• Develop and validate electrical models for transmission lines, vias, connectors, and power distribution networks.
• Define stack-ups, impedance targets, routing constraints, design guidelines, and best practices.
• Run electromagnetic and circuit simulations, including frequency-domain and time-domain analysis, channel models, IBIS-AMI, eye diagrams, and what-if studies.
• Define and execute validation plans using VNA, TDR, TDT, and high-speed measurement setups, driving simulation-to-measurement correlation and root-cause analysis.
• Collaborate with engineering teams and customers across California, Europe, and Asia while supporting probe card and load board product development and next-generation architectures.

Requirements

• Bachelor’s or master’s degree in Electrical Engineering or a related field.
• At least 4 years of relevant signal integrity and power integrity analysis and design experience; the stated education and experience section specifies 5 years with a bachelor’s degree, 3 years with a master’s degree, or a PhD without experience.
• Strong understanding of transmission line theory, power integrity principles, crosstalk, and signal degradation mechanisms.
• Experience with HFSS, ADS, SIwave, PowerSI, PowerDC, SPICE/PSpice, Allegro, and MATLAB.
• Analytical problem-solving, debugging, data interpretation, modeling, cross-functional communication, and engineering judgment in defining model accuracy requirements.

Nice to have

• Hands-on experience with VNA and TDR/TDT measurement tools.
• Experience with PAM4, SerDes, PCIe, HBM, advanced packaging, probe cards, or fine-pitch interconnects.
• Scripting and automation experience with Python or MATLAB.

Culture & Benefits

• Work with engineering teams and customers across multiple sites in Asia, Europe, and the United States.
• Contribute to improving first-pass design success, reducing simulation cycle time, and minimizing customer issues related to signal and power integrity.
• Participate in continuous improvement of modeling methods, design workflows, and high-speed interconnect technologies.
• Work in an environment emphasizing customer focus, ownership and accountability, respectful communication, and people development.