Outsourcing · Data Analysis & Visualisation

Raw data in.
Decision-ready insight out.

I turn messy spreadsheets, databases and logs into clear analysis, honest charts and live BI dashboards your team can actually use.

Start a project See the demo ↓
Sample dashboard preview Demo
$254kRevenue (mtD)
37%Profit margin
14Active projects
80+ Dashboards & reports delivered
25+ Data sources integrated
96% On-time delivery
<48h First insight turnaround

* Demo metrics — illustrative only, not real client figures.

What I do

One partner for the whole data-to-decision loop

Engagements are scoped and priced up front. You keep full ownership of your data, models and files.

Data Analysis

Make sense of what the numbers are actually saying — rigorously, and in plain language.

  • Exploratory & statistical analysis
  • Data cleaning, joins & quality fixes
  • A/B tests, trends & anomaly spotting
  • Insight reports with recommendations

Data Visualisation

Charts and dashboards that communicate, not decorate — designed for the decision at hand.

  • Executive & operational dashboards
  • KPI trees & story-driven reporting
  • Interactive charts & PDF reports
  • Colour, layout & accessibility polish

BI & Dashboards

Production-grade reporting that updates itself, so insight is always current.

  • Power BI models & reports
  • Automated ETL & scheduled refresh
  • Semantic layer & data governance
  • Migration from Excel to BI platforms
Tools & platforms
Python · pandas · matplotlib SQL Power BI Excel / Google Sheets Tableau Figma Notion

Live demo

An interactive sample dashboard

Demo data — synthetic

Built entirely in the browser from synthetic data for a fictional client, “XYZ Retail”. Hover the charts and switch the language to see the interactivity.

XYZ Retail — Sales & Retention Snapshot

Synthetic figures · updated for illustration

Interactive
Revenue (this month) $254k ▲ 12.4% vs last month
Profit margin 37.1% ▲ 2.1 pp
New customers 1,284 ▲ 8.9%
Churn rate 2.3% ▼ 0.4 pp

Revenue vs profit — 12-month trend

$k

Revenue by service line

$k / mo

Customers by segment

%

⚠ These are synthetic numbers for demonstration only — no real client, transaction or personal data is used.

How it works

A clear process, no black box

You always know what is happening, what it costs, and what comes next.

  1. 01

    Discover

    A short call to understand the decision you need to make and the data you have. Clear scope + fixed quote.

  2. 02

    Analyse & model

    Clean the data, validate it, and find the story behind the numbers. Assumptions are documented, not guessed.

  3. 03

    Visualise & build

    Turn insight into dashboard, report or deck. Iterate with you until it reads clearly at a glance.

  4. 04

    Deliver & support

    Hand over files, models and documentation. Optional ongoing refresh, maintenance and enablement.

About

Arthur · solo analyst, senior-grade output

I help teams replace guesswork with evidence. My background spans data governance & analytics, Power BI / agentic BI and tax & transfer-pricing technology — so I understand both the numbers and the business decisions they feed. I work bilingually (English / Vietnamese) and with clients worldwide.

  • Evidence-first: every number traceable to its source
  • Plain-language communication, no jargon
  • Rigorous about data quality & governance
  • Solo senior = direct contact, fast turnaround
A
Arthur Data Analysis & Visualisation Vietnam · works globally

Contact

Have data, need clarity?

Tell me about the decision you need to make and the data you have. I’ll reply within one business day with a proposed approach and quote.

Email me a project brief contact@nntt-arthur.xyz