Portfolio projects
Each case states the question someone needed answered, the method, the finding, and what the work would not claim. Every repository rebuilds from source with one command.
E-commerce
2026 · Approximately 1 month · Sole contributor
Two source systems reconciled onto one country-month grain. 35 checks across three gates decide what reaches a dashboard, and the forecast was held back until an audit had found two defects in my own code.
Grocery retail
2026 · Approximately 2 weeks · Sole contributor
Own-price elasticity for 147 categories. The campaign evaluation’s first answer said coupons reduced spend and the standard check endorsed it; matched on pre-period spend, every sign flips.
Mobility & delivery
2026 · Approximately 2 weeks · Sole contributor
54 weeks across 8 acquisition channels, reconciling to the company total every week. A scope labelled “All Vietnam” turned out to be exactly two cities. Every published figure is indexed.
Advertising
2026 · Approximately 2 weeks · Sole contributor
852,197 records audited before any effect was estimated. 26,426 users appeared in both arms of a test that assumed one arm each, so the recommendation was a conditional rollout rather than a green light.
Fintech
2026 · Approximately 1 month · Sole contributor
4.26% of scored users are associated with 26.94% of credited promotion cost. Recommended a shadow-mode review queue rather than auto-blocking, because the data carries no fraud labels.
A bank-marketing targeting model — the top-ranked 20% captures 51.8% of responders at 2.59× lift while cutting outreach 80%, with a randomised pilot recommended rather than deployment. The dataset is a widely-used teaching set and credit and risk is not a lane I am pursuing; what transfers is the targeting economics — capture, lift and contact cost against a fixed capacity — rather than the domain.
Five campaign, acquisition and conversion cases from 2022–2025 — Laptop SGN, Turis VPN, LeaseRunner and two Golden Owl engagements. They are where the commercial questions came from, and they are kept as background to the analysis rather than as a service on offer.
Reading guide
The web articles keep technical detail light enough for non-analysts. Each DOCX is a stakeholder-ready leave-behind. GitHub links expose the implementation, outputs, and validation trail.