Ecommerce FP&A Manager, Amazon FBA (Finance & Planning) - Based in Hanoi

Ecommerce FP&A Manager, Amazon FBA (Finance & Planning)
About Triptych Ventures
Triptych Ventures operates the Dunwell and Cranbury brands: hundreds of SKUs and millions of units annually sold through Amazon FBA in the US, with a Walmart marketplace launch underway in 2026. We are an eight-figure, profitable, founder-led company with a distributed team across the US, Taiwan, and Southeast Asia, and we are building our operations hub in Hanoi. Finance and planning sit at the center of how we run: every buy, price, and marketing decision is governed by contribution math and cash discipline.
The role
You will own the company's financial planning and analysis function. This is a hands-on producer role, not a supervisory one: you build the models, run the numbers weekly, and put decision-ready analysis in front of the CEO. You own the analytical layer; treasury, banking, and bookkeeping are handled by our US finance lead and outside CPA team, and category strategy is owned by the CEO and Head of Supply Chain.
What you will own
Weekly contribution report: the full account P&L (sales, advertising, Amazon fees, refunds, disposals, COGS, net profit) with year-over-year analysis and commentary, delivered every Monday
Rolling cash flow forecast: Amazon settlement timing, supplier and PO outflows, advertising cash-out, at weekly granularity for the near term and monthly beyond
Demand forecasting and buy sizing: order quantities, stockout buffers, seasonal PO timing, and the math on trade-offs like sell-through versus disposal
Landed cost and unit economics: per-SKU cost stacks (factory, freight, duties and tariffs, fulfillment fees), maintained as the company's source of truth for pricing and margin decisions across Amazon and Walmart
Quarterly targets and variance analysis against them
Finance liaison to our CPA team on inventory valuation, COGS methodology, and month-end close
How we work (non-negotiables)
Committed supplier POs are reconciled into the cash forecast every week; the forecast is never allowed to drift from the PO tracker
The near-term forecast runs at weekly granularity, not monthly aggregates
Models are documented and built for a second reader; material assumption changes and errors are surfaced proactively, with the delta quantified
Every recommendation comes with the math shown
Must have
Demonstrable Amazon marketplace experience: you have personally run P&L or FP&A on a real Seller Central account and can speak fluently to settlements, FBA fee structures, TACOS, and reimbursements
4+ years of highly quantitative FP&A experience at an ecommerce company at our scale or larger (eight-figure annual revenue)
Proven cash flow modeling: you have built and maintained a rolling cash forecast that a leadership team actually ran the business on
Advanced Excel / Google Sheets modeling; comfortable owning a multi-tab model end to end
Excellent written English; async-first communication. C1 on the CEFR scale.
Strongly preferred
Sellerboard, A2X, or comparable Amazon analytics tooling
Inventory-heavy or import businesses: landed cost, duties and tariffs, supplier payment terms
Walmart marketplace exposure
SQL or scripting for data pulls
Engagement details
Full-time. Based in Hanoi (remote initially; office planned). Core hours GMT+7, with 2 to 3 hours of overlap with US working hours for a weekly live review; the rest is async. Reports to the CEO.
To apply
Answer these four questions. Applications that skip them will not be considered.
Describe a forecast or model you built that turned out to be materially wrong. What was the error, who caught it, and what did you change in your process afterward?
What is the largest Amazon account you have personally run P&L or FP&A for? Give annual revenue, SKU count, and the tools you used.
Walk us through how you would reconcile committed supplier PO payments into a 13-week cash forecast, and how you would keep the two from drifting apart.
Your notice period and expected monthly rate in USD.