Current Role
Data-focused internal systems work
Building and improving internal data workflows, supporting operational reporting, and automating repetitive tasks across business systems.
Data · ETL · Python · APIs · Excel Automation
I build practical data tools and clean internal systems that make work faster.
I’m Chen Li, a data-focused developer with a full stack background. I work on ETL pipelines, Excel and Python automation, API integrations, SQL-based reporting, and internal tools that solve real operational problems.
ETL
Data ingestion, transformation, validation, and operational reporting workflows.
Python
Automation scripts, Excel processing, data cleanup, and API-driven tooling.
APIs
REST, XML, and system integration work for internal business processes.
Current Focus
Data Engineering for Business Operations
Data pipelines & ETL
Building reliable flows for importing, cleaning, reconciling, and reshaping operational data.
Excel & business tooling
Automating spreadsheet-heavy workflows with Python to reduce manual work and improve accuracy.
API integration
Working with business systems and data endpoints to connect internal platforms and reporting processes.
About
A developer with a strong business data mindset.
My background spans full stack development, internal business systems, and practical data work. I enjoy turning messy manual processes into structured workflows using Python, SQL, Excel automation, and APIs. I focus on solutions that are useful in the real world: faster reporting, cleaner imports, more reliable integrations, and better visibility for day-to-day operations.
Experience
What I work on
ETL & Reporting
Pipeline and data transformation work
Working with imported files, warehouse data, SQL queries, and transformation logic to produce clean, actionable outputs for business use.
Automation & Integration
Python, Excel, and API-driven tooling
Automating manual Excel workflows, building small tools, and integrating external or internal APIs to streamline business operations.
Skills
Core capabilities
Data & ETL
- ETL workflow design
- Data validation
- Data cleanup
- Operational reporting
Python & Excel
- Python scripting
- Excel automation
- Spreadsheet processing
- Business workflow automation
Data Access
- SQL querying
- Warehouse reporting
- Data extraction
- Structured analysis
Development
- API integration
- Internal web tools
- JavaScript / React
- Full stack problem solving
Highlights
Excel
Turning manual spreadsheet tasks into repeatable, lower-risk workflows.
Python
Writing practical scripts for imports, transformations, comparisons, and automation.
APIs
Connecting systems and data sources to make internal tools more useful and efficient.
Contact
Let’s build something useful.
I’m interested in practical data work, ETL pipelines, Python automation, API integration, and internal tools that create measurable business value.