TM-Cooling System Engineer(Global)-Shenzhen

Key Responsibilities
Support system-level design of direct expansion cooling systems, including refrigeration cycle scheme definition, thermal load calculation, refrigerant matching, and selection & matching of compressor, evaporator, condenser, expansion device and control logic. Carry out thermal & fluid simulation (heat transfer, refrigerant two-phase flow, pressure drop) and system performance prediction; assist in defining test specifications, conduct bench & prototype testing, analyze test data, identify performance bottlenecks and support design iteration. Participate in reliability and robustness assessment of DX cooling systems, review system behaviors under extreme ambient, partial load and transient operating conditions; help identify failure modes and implement mitigation solutions. Collaborate with mechanical, electrical, controls, manufacturing and quality teams to convert system requirements into detailed design, join DFM review, and resolve technical risks during prototype, pilot and mass production phases. Provide technical support for product validation, field commissioning and customer escalations; diagnose common and complex DX system issues (capacity deviation, hunting, liquid flood-back, noise, reliability failure) and roll out corrective actions. Follow the latest DX cooling technologies, refrigerants, components and industry standards; take part in benchmarking, technical feasibility study and technology pre-research for next-generation thermal platforms. Prepare system design documents, calculation reports, test plans, technical specifications and lessons learned; receive guidance from senior experts and contribute to building DX system capability within the team.
Required Qualifications & Skills
Bachelor or above in Thermal Engineering, Refrigeration & Cryogenic Engineering, Energy & Power Engineering or related thermal discipline. 3–7 years hands-on experience in direct expansion refrigeration system design & development, solid understanding of vapor-compression refrigeration cycle, two-phase heat transfer, refrigerant properties and DX system control principles. Practical experience in DX system sizing, component matching, performance testing and troubleshooting; familiar with refrigeration components: scroll compressor, fin-tube evaporator/condenser, TXV/EEV, accumulator, oil separator. Experience using thermal simulation tools (e.g., EES, CoolProp, Fluent, or system cycle simulation tools); capable of thermal load calculation and system performance analysis. Familiar with relevant industry standards for cooling equipment, product reliability test methodology, environmental & safety requirements for refrigerants. Strong systematic thinking, good cross-team communication ability; able to manage tasks across multiple development projects under tight schedules. Good English reading & writing capability for technical documents and global cross-team communication.
Preferred Qualifications
Experience in data center / mission critical cooling DX systems is a strong plus. Hands-on experience with low-GWP refrigerant application and system design optimization. Exposure to refrigeration circuit system controls and EEV control algorithm tuning. Participated in DX cooling new product introduction (NPI) from concept to mass production.

Same Posting Description for Internal and External Candidates