Portfolio — AI Automation & Workflow Engineering

Yuen
Wei Ling

I build AI-powered systems that replace manual, repetitive work — multi-agent pipelines, RAG architectures, automated data validation, and intelligent workflow orchestration.

Available for hire Singapore-based Python Claude API n8n Multi-agent systems
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Selected Projects

RAG · Document Intelligence

Multi-Document Contradiction Detector

A RAG pipeline that ingests multiple PDF documents simultaneously and surfaces factual contradictions across them — tested on real DBS quarterly financial reports. What analysts spend hours cross-checking, the system flags in minutes, with a built-in chatbot for follow-up interrogation.

19 Critical discrepancies found
95 Pages processed
3 Real DBS reports tested
Anthropic Claude API ChromaDB RAG Python Streamlit pdfplumber Pydantic sentence-transformers
View on GitHub
Automation · Job Intelligence

AI-Powered Job Application Tracker

A fully automated job sourcing system that scrapes 150+ Singapore listings daily across MyCareersFuture, LinkedIn and JobStreet, scores each against a candidate profile using Claude API, routes high-relevance matches to Airtable, and delivers a curated daily digest. Distinguishes genuine AI tool roles from roles that merely mention AI in passing.

150+ Listings scraped daily
~2 hrs Manual search time saved
5–12% Genuine match rate (7+ score)
Anthropic Claude API n8n Airtable MyCareersFuture API JSearch API Gmail JavaScript
View on GitHub
Multi-Agent · Data Validation

Multi-Agent Data Validation System

A 4-agent pipeline that takes raw data through ingestion, rule-based checks, and Claude-powered anomaly detection — catching the class of errors that Excel formulas and conditional formatting systematically miss. Outputs a structured Excel report. Replaces approximately one hour of intensive manual review per run.

4 Specialised agents
~1 hr Manual review replaced
0 Edge cases missed by rules
Anthropic Claude API Multi-agent Python Pydantic OpenPyXL
View on GitHub
ETL · ESG Data Engineering

Automated ESG KPI Extraction Pipeline

An end-to-end pipeline that extracts structured ESG KPI data from PDF sustainability reports, loads it into SQLite, and surfaces it in Tableau dashboards — eliminating manual copy-paste from analyst workflows and enabling consistent, repeatable data collection at scale.

100% Automated extraction
0 Manual copy-paste steps
PDF→DB Full pipeline coverage
ETL Pipeline Python Camelot Pandas SQLite Tableau
View on GitHub
FastAPI · AI Workflow · HR Automation

AI-Powered Leave Management System

A full-stack HR leave management system where employees submit requests in natural language — Claude AI extracts the details, routes to the correct department manager, and handles all email notifications automatically. Features role-based access, one-click email approval, and a manager dashboard with full audit trail.

6 Core modules built
3 Claude AI touchpoints
End-to-end Full workflow automated
Anthropic Claude API FastAPI Streamlit Python SQLite Docker Render Mailtrap SMTP Pydantic REST API
View on GitHub Live Demo
Claude API · n8n · Airtable · Streamlit

Hubble AI Feedback Processor

An AI-powered workflow automation system that transforms unstructured WhatsApp client feedback into structured briefs automatically — categorising, prioritising, assigning to the right team member, flagging founder review, and drafting client replies. Built for a real creative agency operations challenge.

6 Bottlenecks addressed
3 Automation layers
~3 hrs Built end to end
Anthropic Claude API Streamlit Airtable Python n8n Twilio REST API
View on GitHub
MCP · ESG Data Engineering

ESG Extraction Pipeline V2

A rebuilt version of the ESG KPI extraction pipeline with MCP integration — enabling richer tool use, smarter document routing, and deeper structured output from sustainability reports.

In progress
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Technical Skills

AI & Automation
  • Anthropic Claude API
  • Prompt engineering
  • Multi-agent systems
  • RAG pipelines
  • ChromaDB (vector store)
  • n8n workflow automation
  • Airtable
Languages & Frameworks
  • Python (Pandas, Pydantic)
  • SQL
  • JavaScript (n8n nodes)
  • Streamlit
  • Excel VBA macros
  • Git / GitHub
Data & Integration
  • ETL pipelines
  • REST APIs
  • Data validation
  • SQLite
  • Tableau
  • OpenPyXL / Camelot
  • pdfplumber
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Credentials

Full Anthropic Academy Curriculum
Claude API · MCP · Subagents · Agent Skills · Claude Code · AI Fluency
AWS Solutions Architect Associate
Amazon Web Services
Google Data Analytics
Google
IBM Data Analysis with Python
IBM / Coursera
JLPT N2 — Japanese Language Proficiency
Japan Foundation
Diploma in Infocomm & Digital Media (Merit)
Temasek Polytechnic
BBA — Bachelor of Business Administration
Ritsumeikan Asia Pacific University

Let's Build Something.

Open to AI automation, workflow engineering, and process automation roles in Singapore.