Ernest Au

Ernest Au

Data Engineer at EY

LanguagesEnglish

Job hunting is tough. Some days it’s downright discouraging. That’s why I believe everyone needs someone in their corner, someone who’s been through it and can remind you there’s a light at the end of the tunnel. Book a session with me, and let’s get you back on track.

  • LanguagesEnglish
  • LocationKuala Lumpur

About Me

I'm currently at EY as a Data Engineer, working on ETL pipelines and cloud infrastructure for enterprise AI.

Skills & Expertise

  • Python
  • SQL
  • Apache Spark
  • Databricks
  • ETL
  • Data Pipelines
  • Data Modeling
  • Data Warehousing
  • Apache Airflow
  • AWS
  • GCP
  • RAG

Career Background

  1. Aug 2025 - Present

    Data Engineer

    EY

    Built and maintained the end-to-end ETL pipelines behind Grid AI Analyzer, an AI chatbot for a national utility's grid equipment data, with client-estimated seven-figure annual savings.

  2. Jul 2025 - Aug 2025

    Data Analytics Engineer

    Delivery Hero

    Deployed standardized SQL data models and Tableau dashboards consolidating KPIs across 18 countries (APAC, EU, Middle East), providing leadership with a unified view of regional performance.

  3. Feb 2023 - Jan 2025

    Data Analyst

    EvaluATE

    Automated the reporting framework for a National Science Foundation (NSF) program, saving 200 hours and $10,000 annually.