Senior Backend Engineer

AcBel Polytech Inc.  •  Mar. 2016 - Present

• [EIP]

  • Responsible for connecting internal platform of company

  • Responsible for developing RESTful API to fulfill requirement

  • Responsible for developing background applications:

    • Employee information autocomplete search based on trie structure

    • Scheduling Tasks for sending email for different purpose

    • Scheduling Tasks for synchronizing data from another source to local database

• [Factory Production Data Collecting System]

  • Using swagger to define API, and then combine maven to produce/implement the interface

  • Responsible for constructing ci/cd process by GITLAB, so that we can deploy our system automatically

• [Smart Meter Data Collecting System]

  • Responsible for developing the socket server, which has the following main components

    • Netty, which is used to receive byte stream and parse it to data transfer object

    • FlinkCEP, which is used to dispatch DTO to different handlers according to different event

    • ActiveMQ, which is used to decouple modules/transfer data between each modules

  • Responsible for developing background applications:

    • Developing the task scheduler based on quartz framework and SOAP&RESTful web service, so that customers can schedule meter-reading task, meter key-update task etc.

    • Packet control of specific events based on java RMI

• [PV Inverter Failure Prediction]

  • Responsible for developing data preprocess pipeline, so that we can convert raw data to training data easier.

  • Responsible for training an auto-encoder deep learning model to achieve anomaly detection, so that we can judge whether an inverter becomes failure based on its features.

• [Virtual Power Planet]

  • Responsible for developing different protocols on single-board computer(debian os), so that it can connect different end-point equipment

    • Modbus RTU/TCP

    • Profibus

    • MQTT

  • Responsible for writing test plan and hand over it to our factory

• [Li-ion Battery Power Supply for Medical Devices]

  • Responsible for development the firmware of microcontroller, the features include:

    • CC/CV charging algorithm based on digital PID controller

    • System state machine for charge/discharge control, end-of-charge control

    • Modbus RTU for reading battery state