Build a Source-to-Source Migration Tool for a Legacy API
Overview
What this challenge is about.
Build a Python migration tool with libcst to rewrite legacy API calls, validate against 50 files, and earn a verifiable certificate.
The scenario
The FinTech (around USD 90M annual transaction volume) has a 4-month deprecation window and a customer-success team that cannot manually walk 220 merchants through line-by-line rewrites.
The Brief
What you'll do, and what you'll demonstrate.
Build a safe source-to-source migration tool that rewrites 14 v3 SDK call patterns to v4 across customer Python codebases, with zero false positives on a held-out corpus.
Earning criteria — what you'll demonstrate
- Use a concrete syntax tree (CST) library to preserve formatting and comments
- Write source-to-source rewrites for a real API migration
- Measure precision and recall of an automated refactoring tool
- Build a developer-experience tool that customers will actually run
Program Fit
Where this fits in your program.
Sharpens the same skills your degree expects you to demonstrate.
Aligned coursework coming soon.
Skills
Skills you'll demonstrate.
Each one shows up on your verified credential.
- Abstract Syntax Trees
Apply abstract syntax trees to solve real industry problems and demonstrate production-level capability.
- Source To Source Transformation
Apply source to source transformation to solve real industry problems and demonstrate production-level capability.
- Python
Write clean, efficient Python for data processing, automation, and backend services.
- Unit Testing
Apply unit testing to solve real industry problems and demonstrate production-level capability.
- Diagnostic Design
Apply diagnostic design to solve real industry problems and demonstrate production-level capability.
- Grammar Design
Apply grammar design to solve real industry problems and demonstrate production-level capability.
Careers
Career paths this challenge builds toward
Completing this challenge demonstrates skills that transfer directly to these roles: