Senior ATE Production Test Engineer – SerDes / Co-Packaged Optics (CPO)

Location: San Jose, CA — Fully Onsite
Experience: 6+ years preferred

Role Overview

We are seeking a hands-on Production Test Engineer to develop and optimize automated test equipment (ATE) programs for SoC devices featuring SerDes interfaces and Co-Packaged Optics (CPO).

The engineer will lead production test development for wafer sort and final test, focusing on design-for-test (DFT), built-in self-test (BIST), yield optimization, test coverage, and high-volume manufacturing readiness.

Candidates must have strong practical experience in SerDes interface testing and ATE production test development, along with proficiency in Python-based automation and test data analytics. Knowledge of UCIe and PCIe protocols is also required.

Key Responsibilities

• Develop, integrate, and maintain ATE test programs for wafer sort and final test of SoCs with SerDes and CPO interfaces.

• Implement production test coverage for SerDes PHY features, including PRBS, loopback, margining, FEC, CDR lock, and equalization settings.

• Use on-die BIST/DFT capabilities and ATE instrumentation to validate device functionality and electrical performance.

• Optimize multisite testing, parallel test execution, guardbanding, test coverage, and test time to improve production efficiency and quality.

• Correlate bench characterization results with ATE measurements, establish production limits, and support the transition from characterization to manufacturing.

• Integrate DFT features such as scan/ATPG, boundary scan, MBIST/LBIST, and JTAG into production test flows.

• Support pattern conversion, timing set development, pin mapping, and ATE pattern bring-up.

• Develop UCIe- and PCIe-related production checks using firmware or test hooks, link-state verification, compliance counters, and error monitoring.

• Build Python automation tools for ATE control, STDF data parsing, analytics, dashboards, statistical process control (SPC), and anomaly detection.

• Collaborate with silicon design, firmware, DFT, product engineering, OSAT/probe, and signal integrity teams to troubleshoot issues and qualify engineering changes.

• Maintain test documentation, specifications, vector maps, production limits, and release notes; support sustaining engineering and operations teams.

Required Technical Skills

1. ATE Production Test Development

• Hands-on experience developing and debugging production test programs on ATE platforms.

• Experience with wafer sort and final test.

• Knowledge of timing sets, DC/AC measurements, multisite testing, and test optimization.

• Experience with platforms such as Advantest V93K/AC+ or Teradyne UltraFLEX/UltraFLEXplus.

2. SerDes / High-Speed Interface Testing

• Strong understanding of SerDes PHY fundamentals and high-speed chip interfaces.

• Experience with PRBS/BER testing, loopback, margining, jitter, eye constraints, and CDR.

• Knowledge of CTLE/DFE equalization and on-die BIST integration.

• Understanding of FEC and high-speed interface electrical performance.

3. DFT / BIST

• Experience with scan/ATPG patterns, boundary scan, MBIST/LBIST, and JTAG.

• Familiarity with WGL/STIL pattern formats and production ATE pattern bring-up.

• Ability to integrate DFT capabilities into manufacturing test flows.

4. Python Automation & Test Analytics

• Proficiency in Python scripting for test automation and data analysis.

• Experience parsing and analyzing STDF test data.

• Knowledge of visualization, SPC, yield analysis, and automated anomaly detection.

• Familiarity with MES integration and continuous integration (CI) pipelines.

5. Protocol Knowledge

• Working knowledge of UCIe and PCIe, preferably Gen5/Gen6.

• Understanding of production-level link checks, link-state verification, error counters, and compliance indicators.

Preferred Qualifications

• Experience testing SoCs with Co-Packaged Optics (CPO) or optical interconnect technologies.

• Experience translating silicon characterization results into robust, high-volume production tests.

• Exposure to AI-assisted test development, test data triage, or automated debugging.

• Experience with yield improvement, production quality, and manufacturing test optimization.