EY Tax Determination API - Erik Brüggemann

Problem Solved

Calculating indirect taxes (e.g., sales tax, VAT) accurately and rapidly is essential for many businesses, especially in e-commerce or scenarios with complex tax regulations. This API provides a scalable and lightning-fast solution for indirect tax determination.

Tech Stack

C# (.NET): Provides a robust and performant framework for building web APIs.
MSSQL: Stores tax rules, rates, and potentially transaction data for efficient retrieval.

Challenges

The primary challenge lay in achieving the extremely low response times required for a high-performance tax determination API. This demanded meticulous optimization throughout the codebase, with a particular focus on caching strategies.

Key Learnings

This project deepened my understanding of:

Profiling and Benchmarking: Identifying performance bottlenecks with precision.
Efficient Algorithms & Data Structures: Choosing the best tools for the job.
Caching Techniques: Leveraging in-memory caching, distributed caching, and intelligent cache invalidation strategies.

See it in Action

https://ey-solution-store.de/de_de/assets/ey-digital-tax-intelligence