Tom Chen
Backend, Data & Market Systems Engineering
tom863631@gmail.com
https://github.com/Tcx086
https://portfolio.tcx086.com

PROFILE
Backend and data engineer working with Python, APIs and SQL databases. Contract part-time contributor at Lomidance, with independent projects in market data and financial research.

TECHNICAL SKILLS
Backend: Python, FastAPI, REST APIs, PostgreSQL, SQLAlchemy, Alembic
Data: SQL, TypeScript, WebSocket, Parquet, DuckDB, Pandas, NumPy
Systems: Linux, Git/GitHub, Cloudflare Workers, D1, validation and testing

ENGINEERING EXPERIENCE
Lomidance | May 2026 - Present
Backend & Data Engineer | Contract Part-time
- Develop Python/FastAPI backend services and PostgreSQL models with SQLAlchemy and Alembic.
- Integrate external AI generation services; validate API contracts, application data flows and failure handling.
- Contribute focused tests and coordinate backend/frontend changes through shared Git/GitHub and deployment workflows.

INDEPENDENT PROJECTS
Microstructure Discovery Factory | August 2026 - Present
Independent Researcher | Market Data & Systems
- Built multi-exchange market data collection, storage, validation and replay with Python, TypeScript, Parquet and DuckDB.
- One documented FOMC capture: 12/12 lanes, 653,722 L2 updates and 4,339,527 trades; observed approximately 68% displayed BTC/ETH depth contraction.

Situation Monitor / Market Context Engine | 2025 - Present
Independent Product & Research Project
- Built a dashboard organizing financial news, economic events and market context with source-linked records, historical selection and Cloudflare Workers/D1 persistence.

Quantitative Portfolio Optimization | 2025 - August 2026
Independent Project
- Compared Markowitz, Black-Litterman, Risk Parity and CVaR methods using Monte Carlo-style tests, scenario analysis and sensitivity to risk and transaction-cost assumptions.

VOLUNTEER EXPERIENCE
Transcommon | September 2026 - Present
Translation Quality Review Volunteer
- Review translated documents for accuracy, completeness, terminology consistency and meaning preservation; flag omissions and requirement mismatches.

EDUCATION
University of Toronto Mississauga
Bachelor of Commerce | April 2025

HOBBY
Golf - playing regularly since high school.