Product R&D Engineer
Oct 2025–15 Apr 2026
Hangzhou Puyu Technology Development Co., Ltd. · Hangzhou, China
Worked on automated environmental and water-quality analysis equipment, covering R&D support, application understanding, field troubleshooting, production support and technical communication.
- Participated in product development and verification, defining application scenarios, analytical workflows and functional requirements to support implementation in instruments.
- Reproduced and investigated reported field anomalies; communicated findings across R&D, production and service functions to support problem resolution.
- Supported assembly, commissioning and pre-delivery activities, with attention to stable operation and consistent application performance.
- Prepared materials explaining instrument principles, operating procedures and maintenance considerations for internal training and customer communication.
- Prepared pre-sales and after-sales technical documentation to support equipment understanding and delivery.
Equipment portfolio
The following instrument categories formed part of the work portfolio:
- Automated ammonia nitrogen analyser.
- Automated filtration unit used with cyanide and volatile phenol analysis.
- Automated water bath.
- Automated potassium ferricyanide analyser.
- Automated free chlorine analyser.
- Automated turbidity analyser.
- Automated atomic fluorescence system.
- Automated colony counter.
- Automated microbiological detection system for total coliforms and Escherichia coli.
Pre-research / Product Development Engineer
Aug 2020–May 2021
Hangzhou Zetian Technology Co., Ltd. · Hangzhou, China
Developed and improved online water-quality instrumentation in response to product and customer requirements, including non-standard equipment development.
- Selected analytical principles and instrument detection-module approaches; carried out comparative experiments to assess technical feasibility.
- Prepared software and hardware requirements to communicate technical needs across development, testing and production.
- Contributed to product concept development, implementation planning, quality control and continuous improvement.
- Performed production and pre-delivery instrument quality-control work, with attention to stability and analytical precision.
- Investigated customer-reported technical issues and supported their resolution during product implementation and use.
Equipment portfolio
- TOX: Acute biological toxicity analysis for water quality.
- TOC: Online total organic carbon analysis.
- VPC: Automated online volatile phenol analysis.
- S: Automated online sulfide analysis.
- CN: Automated online cyanide analysis.
- CM: Centrifugal sample pretreatment.
- AAS: Online flame atomic absorption analysis.
- TP: Total phosphorus pretreatment using heated filtration.