Dim weight break-even
The box size at which dimensional weight overtakes actual weight, and what a packaging change is worth across a real order profile.
Erich Grundman
Senior Product Manager | Ecommerce Fulfillment & Parcel Economics
I turn operations into software,
and better decisions.
I work at the intersection of parcel transportation, ecommerce fulfillment, decision science, and applied AI. I find the hidden variable, then build the system that acts on it.
Career highlights
- $10M+
Annual carrier savings, delivered through 10 launches
6 new carriers, 3 expansions into new countries and warehouses, and 1 relaunch, all API integrations. Product lead on each, and on several the full launch: negotiation data and strategy, implementation, engineering requirements, and rollout.
- 4,000+
Hours of manual work eliminated a year
Three production internal apps, built and shipped as a non-engineer on Next.js, Vercel, and Neon from my own no-code automation prototypes. They centralized the Transportation team's operations, carrier management, and financial reporting.
- 50% → 90%+
On-time delivery, fixed by changing the math
A brand's retail-compliance shipments missed their delivery window half the time. Planning to 90th percentile transit instead of the average, and getting the retailer to move the window off the weekend, fixed it.
- 50%
Faster order to doorstep, at no added cost
Click to delivery time cut in six months for a top ecommerce brand, through method mix, carrier selection, and warehouse routing, with no increase in shipping cost.
- 25%
Faster warehouse to doorstep, $2M+ saved
A customized shipping solution for a key merchant that cut ship to delivery time 25% and delivered $2M+ in transportation savings.
Portfolio
Interactive models of how parcel economics actually work, built on synthetic data so the mechanics can be published without publishing anyone's rates.
Parcel zone optimizer
Place one, two, or three fulfillment nodes, then see what the zone distribution and the blended cost per package do in response.
Contact
Hiring for product where operations meet software?
Direct email reaches me fastest, and a specific first message gets a specific answer.