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Yu Liu

@yuliu

Message

Senior Data Engineer specializing in Oracle PL/SQL ETL, data warehousing, and C#/Unity digital twin visualization.

China

Message

What I'm looking for

I’m seeking a remote Data Engineer or Oracle PL/SQL Developer role. I thrive in full-remote, async, document-driven workflows, and I help simplify cross-border compliance through reliable ETL, batch performance, and bank-level data accuracy.

I’m a Senior Data Engineer with 16 years of hands-on experience in Oracle-based data warehousing, ETL design, and complex PL/SQL development within a large financial institution (2009–present). I’ve integrated data from multiple upstream business systems, built centralized data models, and delivered accurate, timely data to downstream applications, regulatory reporting, and business intelligence teams.

I also bring 13 years of part-time remote C#/Unity development for digitaltwin & BIM visualization, including adapter work and Unity business logic (Unity + C# + SQLite) for large-scale 3D models. I’m expert in SQL tuning, data consistency validation, and batch job optimization (including reducing reporting lead time from 5 daysto 1 day and improving slow ETL jobs by 40–60%) and I specifically seek a remote Data Engineer or Oracle PL/SQL Developer role.

Experience

Work history, roles, and key accomplishments

Current

Senior Data Warehouse Engineer

Current

Major Commercial Bank

Sep 2009 - Present (16 years 8 months)

Owned end-to-end data warehouse ingestion from core banking, loans, deposits, and credit cards into a centralized Oracle system. Automated PBOC/CBIRC regulatory reporting, reducing lead time from 5 days to 1 day, and tuned high-volume batch ETL (some >8h) by 40–60% using index redesign, partitioning, parallel execution, and SQL rewriting while maintaining zero data loss.

Oracle SQL Pl SQL Data Warehousing SQL Tuning Partitioning Parallel Query Regulatory Reporting Batch Job Optimization

Senior C#/Unity Developer

CAXperts

Jan 2013 - Present (13 years 4 months)

Developed C#/.NET and Unity data adapter and visualization features, extracting and standardizing 3D models (AVEVA/PDMS/E3D, Navisworks, SmartReview, PDF P&IDs) for digital twin platforms. Built async, document-driven remote workflows in Azure DevOps/GitHub with CI/CD and used AI-assisted coding to accelerate prototyping and boilerplate by ~30% while optimizing large-model performance.