About | Warangkhana

Hello, I'm Warangkhana — friends call me Dao.

I'm a self-taught Data Analyst with a passion for turning raw data into meaningful insights. I enjoy learning new tools, exploring different perspectives, and continuously improving my skills. With a curious mindset and a problem-solving approach, I strive to support teams by transforming information into clear, actionable insights that help drive smarter business decisions.

Resume ↓

EXPERIENCE

Where I've worked

Apr 2026 - Jul 2026

Business Analyst

Domnick Hunter-RL (Thailand) Ltd.

Designed and automated Power BI dashboards and reporting solutions using ERP, Excel, and Power Query to monitor revenue, productivity, service operations, and business performance.
Developed data pipelines by extracting, cleaning, and transforming structured and unstructured data from multiple sources, improving reporting accuracy and decision-making.
Performed business analysis including sales pipeline tracking, revenue forecasting, install base segmentation, customer analysis, and technician productivity measurement.
Collaborated with cross-functional stakeholders to identify business opportunities, improve operational processes, and deliver
data driven recommendations.
Presented monthly KPI and performance reviews to management, enabling faster strategic decisions through clear data visualization and actionable insights.

Jul 2023 - Apr 2026

Data Analyst

Want Want Corporation Thailand

Serve as the sole Data Analyst supporting Sales, Marketing, HR, and Finance by delivering cross-functional dashboards, reporting system, KPI tracking, and strategic insights to the Country Manager and Headquarters.
Developed and monitored key Sales KPIs, including Revenue Growth, Sales Target Achievement (%), Channel Performance (GT/MT), Outlet Coverage, and Sales Expense, improving visibility of performance trends, supporting market expansion strategies, and cost control initiatives.
Conduct MoM and YoY product performance analysis and post-campaign ROI evaluation to optimize SKU performance, improve marketing effectiveness, and identify new growth opportunities through consumer behavior analysis.
Prepare management financial reports, including Gross Revenue, Gross Profit, COGS, and Operating Expenses, and collaborate with Finance on Annual Operating Plan (AOP) development and business analysis.
Design and implement a Time Attendance Monitoring Dashboard to track employee attendance, leave, lateness, and early check-out, improving HR reporting efficiency and reducing manual administrative workload through automation.
Led end-to-end company website development and ongoing content management using WordPress, ensuring brand alignment and data integrity.

Nov 2022 - Jul 2023

Marketing Data Analyst

Food Innovation Service Plant (TISTR)

Built and maintained a structured customer database including customer profiles, business models, technology interests, service categories, acquisition channels, repeat customers, and revenue data using Google Sheets, enabling data-driven marketing and service analysis.
Developed interactive dashboards using Looker Studio to visualize service performance, customer acquisition channels, and revenue trends, providing leadership with actionable insights to improve service delivery and channel expansion.
Conducted customer acquisition analysis and identified that 78.13% of customers were acquired through word-of-mouth, reinforcing the organization’s customer retention strategy and service quality focus.
Proposed and implemented Facebook marketing content strategies by educating entrepreneurs and publicizing capital to entrepreneurs, resulting in a 4.11% increase in service users via Facebook in Q2/23 compared to Q1/23.
Monitored payment status, revenue, and outstanding balances, supporting financial performance tracking and successfully reducing outstanding balance by over THB 150,000 in Q2/23.

Jun 2022 - Sep 2022

Bulky User Operation

Flash Express Thailand

Supervise and coordinate supervisors, district manager, and area manager in Bangkok, Central, North, and South Region.
Solve the problem in daily jobs such as customer can’t register KA customer, the discount doesn’t approve, connect API, repeated account, want to register credit customers, etc.
Make discounts, cash on delivery, and free return fee for customers by considering criteria such as customer type, monthly ordering amount, and proof of delivery. etc. via SPM and CRM systems of Flash Express.
Collect the customer’s request for a discount in Google Sheets and withdraw the accessories to the customers via FlashFulfillment systems.
Reported discount requests through the CRM system on a daily and monthly to manager and director.

EDUCATION & COURSEWORK

Academic background

2018 - 2021

Bachelor of Science, Statistics

Prince of Songkhla University

First Class Honors · GPAX 3.75

Principle of Statistic
Database Management
Data Management and Statistic Data Analyst
Applied Multivariate Analysis

Dec 2022 - Apr 2023

Data Science Bootcamp 7

DataRockie

Certificate Badge →

Spreadsheets • Databases • R Programming • Data Transformation • Data Visualization • Essential Statistics •
Essential Machine Learning • Python Programming • Python for Data Analysts • Dashboards

SKILLS

What I work with

Data Analysis

Excel • Google Sheets • R (caret, tidyverse) • Python (Pandas, NumPy, Scikit-learn) • SQL • Statistics •
Machine Learning • Power BI • Tableau • Looker Studio • API (GET, Request) • Web Scraping • SPSS •
Minitab

Language