Tax Technology · New York City, NY

Tax technology
that ships.

I'm Vincent Deriu, a licensed New York CPA who writes code. For the past five-plus years I've built digital tax solutions — data pipelines, AI agents, and reporting platforms — at EY and Deloitte for Fortune 10 and Fortune 100 clients.

← Full resume & background

What tax technology means here

Tax technology is the engineering layer under tax and accounting: getting source data out of ERPs, transforming it correctly, applying tax logic, and putting reviewable numbers in front of the people who sign them. Digital tax solutions only work when someone understands both the code and the return — that overlap is the work I do.

Capabilities

Indirect tax data pipelines

ETL in Python, SQL, and REST APIs to extract, calculate, and collect indirect tax appropriations — built for a $400B+ US company and its subsidiaries, with month-end close led for three years.

Digital tax platform implementations

Client service lead on implementations of EY's accounting & tax technology Global Tax Platform (EY.ai), including custom builds on top of out-of-the-box modules and integrations with client ERPs.

AI agents for tax workflows

Agents defined on EY.ai with structured inputs and outputs, connected data sources, and document templates that answer client inquiries with pre-structured deliverables.

Reporting and visualization

End-to-end workflows in Databricks and Power BI so tax and accounting teams own, transform, and visualize their own reporting processes instead of depending on spreadsheets.

Digital assets and information reporting

Backup withholding certification reviews for a digital-assets exchange, custodian cost-basis logic validation, and daily withholding calculation systems for wealth management.

Close and controllership automation

Structured and oversaw month-end close for a ProCo and LeaseCo under an eCommerce client, with automated data storage, retrieval schemas, and rules driving the workflows.

Stack

Python · SQL · Databricks · Power BI · Alteryx · REST APIs · LLM agents (OpenAI, Anthropic) · EY.ai Global Tax Platform · Deloitte myInsight CE