Huu Toan Nguyen

Senior Data Analyst · Analytics Engineer_

Engineering business-first data systems that close the gap between numbers and real-world execution.

Summary

I'm interested in what happens after the analysis. I take a business problem end to end — scoping it with the teams who own the process, building the automated pipeline and the data model, then the dashboard, the predictive model, or the internal app, depending on what the problem actually needs. Increasingly that includes AI Agent for the parts nobody should be doing by hand. Most of the value still comes from the decisions before the code: what to measure, what to leave out, and how simple it has to be for the people who act on it.

Experience

10/2024 – Present

Independent Data & App Consultant

End-to-end data partner for two marketing agencies (digital & event): scoping, building, and deploying solutions independently, client by client.

Event Agency

10/2025 – Present

Designed and built an internal mini-ERP using AppSheet, Google Apps Script, and Google Sheets, centralizing fragmented business operations into structured data and automated workflows.

Data Architecture

Designed a relational data model connecting projects, clients, employees, and operational records, with validation and role-based data access.

Workflow Automation

Engineered project tracking, approval workflows, HR attendance, payroll preparation, automated notifications, and management reporting.

System Integration

Built two-way project data synchronization with client-specific Google Sheets, using change detection, data validation, and filtering to protect internal financial data.

Digital Marketing Agency

10/2024 – 01/2026

Transformed fragmented marketing data and manual reporting into centralized analytics and automated workflows.

Data Engineering

Designed fact/dimension reporting models and built Apps Script pipelines integrating GA4 and Search Console data into BigQuery, powering Looker Studio dashboards.

Analytics & Reporting

Automated scheduled reports and threshold alerts through Telegram and email, while supporting campaign analysis, A/B testing, and regression-based forecasting.

Process Automation

Developed a Google Sheets-based task management system with automated notifications and cross-team handoffs, adopted by approximately 40 users.

06/2024 – 09/2024

Senior Data Analyst

Atlas · owner of ARIEL Bath, bathroom vanities and fixtures sold direct and through major ecommerce marketplaces

Ad Attribution Analysis: Showed Google Ads spend drove marketplace sales far more than the brand's own D2C store, using cross-channel correlation and time-lag analysis. Chose a simple linear regression deliberately — accurate enough, and simple enough for non-technical C-level to trust and act on.

A/B Testing: Partnered with marketing to test and iterate on promotions and campaigns, tailoring the test design to each project's goal to determine which approach performed best.

Dashboard Consolidation: Consolidated duplicate Tableau dashboards into a unified, faster-loading reporting hub with reliable, consistent metrics, eliminating the need to cross-check numbers across overlapping dashboards.

Enablement: Gave internal teams the ability to explore data and surface insights on their own, tailored to each person's actual needs, by training them on Looker Studio.

03/2023 – 05/2024

Data Analyst

Yes4All · cross-border e-commerce, home and fitness goods sold through major online marketplaces

Data Pipeline: Built and version-controlled ETL transformations in Git, deployed to Apache Airflow, keeping cross-functional teams on current data for daily decisions.

Dashboard & Reporting: Built inventory and supply-chain dashboards in Power BI and Superset, in collaboration with the sales, marketing, accounting, and supply-chain teams, so operations could place orders on time.

Pricing Analysis: Let executives test price scenarios before committing to marketplaces, by building a pricing simulation tool.

Automation & Alerts: Warned the right person before a stock issue became a real loss, with automated alerts across multiple channels.

07/2022 – 01/2023

Data Analyst

FP Logistics · B2B trucking & warehouse freight logistics provider

Data Modeling & Reporting: Built and optimized SQL queries for dashboards and visualizations, and created data marts from the company's data warehouse to meet specific departmental reporting needs.

11/2021 – 06/2022

Data Analyst

Mio App · social commerce startup for fresh groceries, raised $9.1M across Seed and Series A

Dashboard & Reporting: Built dashboards for the Board of Directors, stakeholders, sales, and finance by running ETL processes on the data warehouse, giving each team direct access to critical business metrics.

04/2015 – 03/2021

Content & Activation Event Specialist

OPPO Vietnam · consumer electronics, one of the top smartphone brands in Vietnam

Sponsorship ROI Analysis: Measured sponsorship ROI of major TV shows and music campaigns using media, digital, and sales metrics; results guided the next season's sponsorship decisions.