About Me

Education

• 15 Dec 2025 -

  Present

  1.5 Months
  

  System Analyst

  Bank of China (Hong Kong) Limited

  IT Department - Data Application Development Division

• 15 May 2023 -

  12 Dec 2025

  2 yrs 6.8 mos
  

  Software Engineer

  Wonderbricks LimitedBillie Onsite

  Job Summary.

  • DevOps.
  • Fully in charge of all tasks in devops and cloud infrastructure in AWS
  • AWS resources are fully controlled by Terraform for easy replication of the entire infrastructure, which include:
    ▶AWS Resources
  • Designed Cleanup Flow to completely remove all resources in a VPC and resolve the related chanllenges involving dependencies among resources
  • Created and hosted web-based infra-dashboard to display every detail deployed in our infrastructure
  • Frontend Development.
  • Developed a real-time application in both React and React-Native, for both web and mobile applications
  • Apply Redux-Toolkit and Redux-RTK-Query to build clean and performant react component
  • Worked on app submission to App Store and Google Play using EXPO
  • Refactor messy code generated by LovableUI vibed by our product manager, reduced a single component from 4000 lines of code into 1000 lines for maintainability.
  • Backend Development.
  • Maintained multiple micro-services in different usecases using two frameworks:
    • Nodejs. Nestjs, TypeORM (file generation, pdf is craeted by React-PDF)
    • Java, Kotlin. Spring Boot, JOOQ, JPA (all serious business logic, split by domain context)

  • Designed database schema and performed schema migration for PostgreSQL using Prisma

    Schema Design strictly follows Context-First approach from Domain Driven Design.

    Due to skillsets among the team, we still follow elementary controller-service-repository achitecture to avoid any misalignment

  • Created complex SQL for specific requirement such as dashboard with filtering, or SQL that cannot be auto-generated from ORM
  • Make comprehensive documentation on Stripe-API using Kotlin such as how to create subscription and how to schedule subscription changes with proration rate
  • Used Redis to implement distributive lock for handler of Stripe events because Stripe may send the same webhook event multiple times to ensure it gets delivered successfully

  Skills Needed

  Typescript / Frontend

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  React

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  Redux-Toolkit

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  RTK-Query

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  Zustand with React-Query

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  Tailwind

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  React-Native

  Study notes on react-native

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  React Native Reanimated

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  Expo-Cli (Development Build, ad-hoc Internal Distribution, etc)

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  Algolia (Search Engine)

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  Socket.io-client

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  Push Notification for iOS, Android via EXPO

  Typescript / Backend

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  Nestjs

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  Express

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  Mongoose

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  Socket.io

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  Algolia (Search Engine)

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  Googleapis + Nodemailer (for Sending Emails)

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  Prisma (db migration only)

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  Stripe (For Reading stripe content, e.g., Products, Subscription-end-date, metadata, etc)

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  Prisma-Kysely (as type-safe query builder, a counterpart of JOOQ in java; and go-jet in golang)

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  Expo Push Notification

  Kotlin / Backend

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  Stripe (For Subscription and webhook events handling)

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  Spring Boot

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  JPA

  Integrate JPA with existing DB

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  JOOQ as Query Builder and DAO auto-generator

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  JUnit5 For Integration Test and Unit Test

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  Mockk For Mocking Services

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  Algolia (Search Engine)

  Python / Backend

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  Flask

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  Boto3

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  Openpyxl

  Database

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  PostgreSQL

  Studies with different frameworks

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  MongoDB

  Studies on mongo

  Infrastructure as Code

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  Terraform

  Cloud (AWS)

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  Lambda Functions

  For File Generation (Python Application) and Google Authentication (Nodejs Application)

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  Lambda Functions

  Via docker image when unzipped file size exceeds 250Mb

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  Lambda Functions

  As a snap-started lamda function for Spring Boot Application

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  S3, Cloudfront and Route53 for hosting React Application

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  ECS Fargate

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  Load-Balancer, listeners and target groups

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  Security Groups

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  VPC, VPC Endpoints and Lambda inside VPC for Elastic Network Interface

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  RDS and RDS-proxy

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  IAM role for access right among resources (e.g., create policy to let lambda function access RDS-Proxy)

  RabbitMQ

  Message Queue Design for an Mobile App

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  Delayed Queue by means of Dead-letter Queue, e.g., pin a message to the top and restore its position 1 week later

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  Direct Exchange with prefetchCount for rate limit

  CICD / Github Actions

  Study Notes for Github Actions

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  CICD Workflow for Frontend Deployment

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  CICD Workflow for Backend Deployment via pushing image to ECR, updating ECS Task and updating ECS Service

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  CICD Workflow for Serverless Functions Deployment in Python (Flask) and in Nodejs (Express) and in Kotlin (Spring Boot)

  Docker

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  Containerization of Python, Node.js, Java and Kotlin application into images for deployment via ECS

  Documentation (I wrote alot)

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  Reason. Every company should have a wiki explaining all projects and common terminologies used among projects, I initiated one as the company lacked of it

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  Implemented CICD to encourage contributions from staffs

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  Google Authenticated via backend served in Lambda

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  Comprehensive documentation on cloud infrastructure before leaving the company

  Redis

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  Mainly used to implement distributive lock

  iOS Deployment to AppStore with EXPO

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  Create production build for publishing to app store

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  Manage and version the builds for uat, prod, implement force update accordinly

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  Handle App Submissions and and understand Rejections

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  Manage everything above with 2 stages (UAT, PROD) and perform OTA update in UAT when there is no changes in native module.

• 15 Aug 2022 -

  April 2023

  8.4 Months
  

  AI Engineer

  Eye Catching Limited

  Job Summary.

  • Study eye-tracing related algorithm.
  • Study and deploy machine leanring algorihtm in web-app and desktop-app.
  • Completely translate a BlazeFace model in python into the same model in libtorch of C++ for GUI application.
  • Implement methods to ensure weights in pytorch model can be used in libtorch model.
  • Study CMake and develop software to combine libtorch model and imgui application.

  Skills Needed

  Python

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  PyTorch

  Typescript

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  Tensorflow

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  Onnx

  C++

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  Libtorch

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  Imgui

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  CMake Ecosystem

  Studies on CMake

• Sep 2021 -

  July 2022

  10.9 Months
  

  Senior Software Developer

  RaSpect Intelligence Inspection Limited

  Job Summary.

  • Object Detection Related.
    • Text Detection. Implemented text detection (EAST) to facilitate signboard defect classification.
    • Crack Detection. Help implement detection model for crack and spalling.
    • Rust Detection. Implemented two solutions: (i) Text removal -> classifcation pipeline; and (ii) direct object detection model using faster rcnn.
  • Image Generation/Inpainting.
    • DefectGAN. Implemented image-generation model following this paper that generate synthetic data on cracks and spallings for training defect detection models on facades.
    • Text Removal. Experimented with existing algorithms like various GAN or image-inpainting method in pytorch. Finally I follow this paper to obtain a text eraser with satisfactory performance.
      For an example of failed model, we refer the results to here.
  • Web or Hardware Related.
    • Maintain React Next project.
    • Data scrapping for house transactions records.
    • Automation on tracking latest rtk-data from official geodetic website and data-processing pipeline.
    • Work with a local grpc based service in Python to interact with a compiled binary (.exe), messed with multi-threading stuff.

  Skills Needed

  Python

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  Selenium

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  Boto3 (AWS SDK)

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  Mongoengine

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  gRPC

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  PyTorch

  Data Annotation Tool

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  CVAT

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  COCO-Annotator

  AI-General

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  Data Annotation

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  DataLoader with Various Data Augmentations

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  Model Training for Rust Detection

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  Model Training for Crack Detection

  AI-Models

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  GAN for Producing Synthetic Data

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  Faster RCNN from Scratch and its Modification

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  Single Stage Headless Face Detector into Rust Detector

  Javascript (Legacy Project)

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  Next

• Aug 2020 -

  Mid-Aug 2021

  1 yr 0.4 mos
  

  Software Engineer

  EAB Systems (Hong Kong) Limited

  Job Summary.

  • Build video conferencing frontend and backend application in React, Twilio and express.
  • Build CMS system that lets users create their own single page application.
  • Machine Learning Related. Build CSV Importer (together with an express layer and a Flask layer) that can parse a csv/excel file and perform:
    • Data Classification.
      • Sample Code: Link
      • Classify column based on existing data using LSTM model with two dense layers and finally a softmax.
    • Auto Date-reformatting.
      • Sample Code: Link
      • Based on machine learning model (transformer in NLP) that can translate all common form of date into YYYY-MM-DD format.
      
      
    Data Classification and Auto Date-refomatting are separately two models placed inside tensorflow-serving for deployment.

  Skills Needed

  Typescript

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  React

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  Redux

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  React-Native

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  Express

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  Mongoose

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  Sendgrid

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  Twilio

  Networking

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  socket.io

  Python

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  Pandas

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  Tensorflow v2

• Sep 2019 -

  Aug 2020

  11.9 Months
  

  Front-end Developer

  eLearningPro

  Job Summary.

  • Create HTML5 Coursewares
  • Maintain web pages and construct React frontend application
  • Created a python GUI project for text extraction from an image (a work necessary to translate old fresh game into html5 game).

    Steps for the App:

    1. Press Screenshot button in our app (image of preselected monitor will be recorded)
    2. Select the area for text extraction
    3. Text will be captured by calling google vision API

    Detail can be found here.

  Skills Needed

  Javascript

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  React

  Python

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  tkinter

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  pyinstaller

  Art

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  Adobe Premiere

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  Adobe Photoshop

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  Saola Animate (CSS Animation)

• Jan 2018 - Dec 2018

  11 Months
  

  2D Game Artist

  深圳疯点子科技有限公司

  Job Summary.

  Responsible for constructing 3d accessories, creating environment art and character design.

  Game I worked on

  Skills Needed

  Software

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  Unity

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  Autodesk 3ds Max

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  Adobe Photoshop

  Artistic Skills

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  2D Character Design

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  UI Assets Design

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  Low-poly 3D Model Construction

• Oct 2015 to Dec 2017

  

  Unemployed

  Home Guardian

  Skills Needed

  Thick Skin

  Self-Discipline

  Parental Support

  I was striving to become an artist within two years. Of this time I was taking online courses and drawing on a daily basis. I aimed at being able to draw a variety of game assets (not just character).

  My outcome based on this period can be seen here.

• Mar 2015 - Oct 2015

  6.9 Months
  

  Senior Research Assistant

  Department of Mathematics, Hong Kong Baptist University

  Study HJB equations arised in specific financial games.

• Sep 2014 - Feb 2015

  6 Months
  

  Research Assistant

  Department of Mathematics, Hong Kong University of Science and Technology

  Study the property of viscosity solution of HJB equations.

• Sep 2012 - June 2014

  1 yr 9.8 mos
  Teaching Assistant

  Department of Mathematics, Hong Kong University of Science and Technology

  Fulfill teaching duty as required in obtaining studentship in the course of M.Phil study. Subjects include:

  • Calculus II
  • Linear Algebra
  • Mathematical Analysis
  • Real Analysis

  Teaching Material