Projects

🤖 Manual Whisperer

Aug 2024 - Dec 2024

This is a web app with an agentic RAG chatbot that helps workers debug machine alarms by searching the internal knowledge base and manuals. It also includes a web dashboard for viewing live machine alarms, managing a knowledge base of machine alarms and solutions (supporting file uploads), and displaying analytics of machine alarms and user questions. Additional exploration includes using the colpali model for indexing and retrieval but was not included in the final product due to GPU costs.

URL: https://github.com/zhiweit/manualwhisperer

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solid

tailwind

solid-start

editorjs

langgraph

drizzle

llamaindex

sqlite

sqlite-vec

postgres

pgvector

openai

colpali

cohere

♻️ Bloo

May 2024 - Aug 2024

RAG web app with chat feature (supporting image upload) to answer recycling questions, using knowledge from NEA items and web search (Tavily). The function is similar to ChatGPT where the user can upload an image and the app answers the user's question based on database information, and online website(s), and falls back to ChatGPT if unable to answer the user's question.

URL: https://blooapp.vercel.app/

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react

next

nextui

fastapi

firestore

typesense

langgraph

google cloud run

openai

😋 Nomnom

May 2024 - Jul 2024

Nomnom is a web app that helps you to find recipes to cook given ingredients. Features include (1) Recipe search: ingredients and recipe name; (2) Recipe recommendation: Based on the recipe name and ingredients via full-text index; (3) Nombot: Chat with data from recipes (4) Recipe management: Create your recipes to share with the community; (5) Favouriting recipes for later viewing

URL: https://github.com/zhiweit/nomnom

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react

next

typescript

tailwind

nextui

blocknote

graphql

neo4j

langchain

aws cognito

aws s3

aws lambda

openai

🔍⚠️ Anomaly Detection

Mar 2024 - Apr 2024

Identify anomalous users from a recommender systems dataset (user-item ratings). This is best viewed in Google Colab where all the cell outputs are preserved. Performed EDA, feature engineering, hyperparameter tuning, and evaluation of models. The approach taken was to create predictions based on the majority of predictions from selected models.

URL: https://drive.google.com/drive/folders/19JOW3OeHC3QpidOxh4jC5u7v5HfRcl_L

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logistic regression

knn classifier

random forest

xgboost

neural network (mlp)

autoencoder

isolation forest

local outlier factor

🌍♻️🛒 Carbon Offset Marketplace

Feb 2023 - Apr 2023

A platform for companies any entity to (1) obtain funding for new green projects and (2) further monetise existing green projects that have already began consistently removing CO2 from environment. The focus is primarily on the voluntary market where anyone can fund new projects or support existing projects by buying carbon credits sold by these companies.

URL: https://github.com/IS213-G9-tokyobanana/carbon-marketplace-backend

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react

flask

express

postgres

mongodb

docker

temporal

meilisearch

terraform

stripe

🏢🎫📅 Corporate Pass Booking System

Aug 2022 - Nov 2022

A corporate pass booking system developed as part of a school project for staff to book complementary corporate passes to local attractions. User functionalities include: (1) Viewing pass availability, (2) Booking passes, (3) Reporting of lost passes, (4) Email reminders and notification. Admin functionalities include: (1) Pass management (CRUD), (2) User management (CRUD), and (3) exporting of data.

URL: https://github.com/zhiweit/c-pass-booking

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vue

typescript

bootstrap

css

spring boot

java

mysql

jwt

docker

thymeleaf

♻️🇸🇬 RecycleSG

Aug 2022 - Nov 2022

A web app to identify item using image recognition API, check whether item is recyclable, and to update NEA's recyclable database items progressively. User functionalities include: (1) Search by text, (2) Search by image, (3) Send recycling request to admin (if item is not in database), (4) Login and earn reward points for each image taken at a recycling bin, (5) Book bulky waste collection. Admin functionalities include: (1) Dashboard of text searches, (2) Manage recycling requests, (3) View recyclable database, (4) Manage collection bookings.

URL: https://recyclesg.vercel.app

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vue

typescript

primevue

tailwind

nuxt

cloud firestore

cloud storage for firebase

google cloud vision api

firebase admin

Work Experience and Education

• May 2024 - Aug 2024

  Full Stack Developer

  Bloo (Contract)

  Develop a RAG-based web app to provide recycling instructions to items present in an image using NEA data and online websites via LangGraph agentic workflow and large multimodal model for identifying items in the image.

• May 2023 - Aug 2023

  Backend Developer Intern

  Alpha Impact

  Back-end development using Spring Boot and MongoDB across microservices. Some key highlights include (1) implementing data streaming at trader's profile page using server-sent events via Spring webflux and MongoDB change stream to improve user experience; (2) Boosted post feature to increase utility of company's token (FOLO); (3) Reducing data fetching latency using memory cache.

• Jul 2021 - Jul 2025 (expected)

  Information Systems Undergraduate

  Singapore Management University | School of Computing and Information Systems

  Teaching assistant ISSS615 Data Management (Entity-relation diagram modelling, MYSQL)

• Mar 2018 - Aug 2018

  Asset Transfer Intern

  Citibank

  Built on existing Excel macros to expedite asset transfers using legacy systems. Developed an Excel user form for quicker data entry, in addition to existing legacy system.