Tan Zheng Jie tzjZhengJie

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Overview Repositories 13 Projects Packages Stars

Overview
Repositories
Projects
Packages
Stars

tzjZhengJie/README.md

Hi, I'm Zheng Jie 👋

Data Analyst with hands-on experience at Binance, working across product analytics, payment operations, and petabyte-scale data pipelines. I turn messy data into decisions.

📍 Singapore | 📬 zhengjietan20@gmail.com | 🌐 chriszj.com |

What I Do

Product & User Analytics — A/B testing, funnel analysis, retention, and engagement metrics across millions of users
Data Engineering — ETL/ELT pipelines with Airflow, Hive, and Spark SQL on large-scale financial data
AI & Automation — LLM-based workflows, RAG pipelines, and low-code automation with Make.com
Statistical Analysis — Experimental design, hypothesis testing, and business intelligence

Featured Projects

Project	What it does	Stack
🤖 Multi-Agent Text-to-SQL	Translates business questions into production-ready SQL using RAG-based schema retrieval and query validation	Python, LLM, RAG, OpenAI API
💳 Credit Risk Analytics	SQL framework across 28K+ loans — surfaced a 4.66x default cliff at 30% DTI and $10.5M expected-loss risk zone	SQL, Python
🔗 On-Chain Risk Scoring	Classifies Solana tokens into risk tiers by ingesting contract data via Arkham API	Python, Spark SQL
📰 Resume-to-Job Recommender	Parses uploaded resumes using Gemini via Vertex AI API to extract skills and experience, then matches the output against a BERT-classified job database to surface relevant job recommendations	Python, NLP, Vertex AI

Tech Stack

Languages & Analytics Python SQL (PostgreSQL, MySQL, Spark SQL) Pandas NumPy Scikit-learn

Data Engineering Apache Airflow Apache Hive Spark ETL/ELT Pipelines

BI & Visualisation Tableau Power BI Excel

AI & Automation LLMs RAG Make.com REST APIs

Experience Highlights

Binance (Feb 2025 – Sep 2025)

Analysed new feature launches (AI Chat, Live Streams, Tipping) across 4M+ active users
Identified a 5% DAU decline from an A/B test on app version rollout, driving timely intervention
Refactored SQL pipelines, cutting resource consumption by 50%

Binance — Payment Operations (Nov 2024 – Feb 2025)

Processed payment data across $200M+ average daily volume and 41.7M+ active users
Detected fraudulent C2C transaction patterns, supporting regulatory compliance