Entrepreneurial
Portfolio Rebalancer
Tax-efficient portfolio rebalancing for individual investors
PythonReactTypeScriptFinancial APIs
The Problem
Individual investors pay significant advisory fees for basic portfolio maintenance. Rebalancing—adjusting holdings back to target allocations—is mechanical but intimidating for most people. Tax implications make it even more complex.
The Solution
Building a consumer application that handles the complexity of tax-efficient rebalancing automatically. Users connect their brokerage accounts, set target allocations, and receive optimized trade recommendations that minimize tax impact while achieving their goals.
Product Decisions
- Tax efficiency as a first-class feature, not an afterthought
- Focus on 'raising cash' use case—common need, poorly served by existing tools
- Simple onboarding: connect account → set targets → get recommendations
- Educational approach: explain why each trade is recommended
Architecture
Frontend
React with TypeScript for type-safe, maintainable UI
Backend
Python for financial calculations and optimization algorithms
APIs
Brokerage API integrations for account data and trade execution
Technical Highlights
- Tax-lot optimization algorithm considering short vs long-term gains
- Constraint-based optimization respecting wash sale rules
- Real-time portfolio drift calculations
- Secure OAuth integration with major brokerages
- Cost-basis tracking across multiple accounts
Results & Outcomes
- Demonstrates end-to-end product thinking from problem to solution
- Combines domain expertise (FINRA Series 7/63) with engineering skills
- Positioned for monetization as a SaaS product
What I'd Do Next
- Beta launch with select users for feedback
- Add support for additional brokerages
- Implement automated recurring rebalancing
- Build mobile companion app