Company Description Universal Scientific Industrial (Shanghai) Co., Ltd. (USI) is a general leader in electronic design and manufacturing and a pioneer in System-in-Package (SiP) technology. Together with Asteelflash and Hirschmann Car Communication, USI operates 30 production and service locations across Asia, Europe, the Americas, and Africa. The company delivers diversified electronic products and comprehensive D(MS)² services, including design, manufacturing, miniaturization, industrial software and hardware solutions, and material procurement, logistics, and maintenance services.

USI is a subsidiary of ASE Technology Holding Co., Ltd., providing strong backing and global reach. Candidates can learn more about USI through its website and social media presence on LinkedIn and YouTube.

Role Description This full-time, on-site Senior Process Engineer role is based in Guadalajara, JAL.

The Senior Process

Engineer will design, develop, and optimize manufacturing processes to support high-quality, cost-effective production of electronic and SiP solutions. Day-to-day activities include analyzing process performance data, identifying improvement opportunities, implementing process control methods, and collaborating with cross-functional teams such as production, quality, and design engineering. The role will also involve troubleshooting process issues, developing standard operating procedures, supporting new product introductions, and ensuring alignment with safety, environmental, and regulatory requirements.

The Senior Process

Engineer is expected to mentor less experienced engineers and contribute to continuous improvement initiatives across the facility.





Qualifications

- Extensive expertise in Selective Soldering Process Engineering for PCB Assembly (PCBA) manufacturing, including process characterization, recipe development, parameter optimization, and qualification of through-hole soldering applications.
- Advanced knowledge of ERSA selective soldering equipment (Versaflow series or equivalent), including machine setup, process programming, nozzle selection, fluxing strategies, preheating profiles, solder wave optimization, and process validation.
- Strong capability in process characterization and control, utilizing Design of Experiments (DOE), process capability analysis, thermal profiling, and Statistical Process Control (SPC) to achieve robust and repeatable soldering performance.
- Proven experience in developing, validating, and maintaining soldering processes that comply with IPC-A-610, IPC-J-STD-001, and customer-specific quality requirements, ensuring high first-pass yield and defect reduction.
- Hands-on expertise in preventive, predictive, and corrective maintenance of ERSA selective soldering systems, including solder pot management, flux delivery systems, nitrogen systems, conveyor mechanisms, preheating modules, pumps, and motion control components.




- Strong analytical and troubleshooting skills for identifying and eliminating soldering defects such as insufficient fill, non-wetting, dewetting, solder bridging, icicles, blowholes, and flux-related anomalies through systematic root cause analysis.
- Experience leading process improvement initiatives using Lean Manufacturing, Six Sigma, PFMEA, Control Plans, and Continuous Improvement methodologies to enhance productivity, equipment uptime, yield, and overall equipment effectiveness (OEE).
- Ability to lead cross-functional teams involving Manufacturing, Quality, Maintenance, Product Engineering, and Suppliers to support new product introductions (NPI), process transfers, and manufacturing scale-up activities.
- Demonstrated success in developing technical documentation, including process specifications, work instructions, maintenance procedures, validation protocols (IQ/OQ/PQ), acceptance criteria, and engineering reports.
- Strong understanding of electronics manufacturing quality systems, ESD controls, safety requirements, and environmental compliance standards applicable to high-reliability PCBA production environments.
- Bachelor's degree or higher in Engineering (Electronic, Manufacturing, Industrial, Mechanical, Mechatronics, Chemical, or related discipline) with significant experience supporting automated selective soldering operations in high-volume manufacturing environments.
- Proven track record of driving process excellence through equipment characterization, soldering technology implementation, maintenance optimization, and continuous improvement of ERSA selective soldering platforms.

📌 Senior Process Engineer (Guadalajara)
🏢 Universal Scientific Industrial Co.
📍 Guadalajara