TrunkMatch — marketplace matching + queueing for hand-me-downs

Summary

TrunkMatch is a marketplace for kids' hand-me-downs, matched by age, size, and family needs, with a queue that gives priority access to the best match first.

The problem

Most marketplaces are “search first”. Here, the core value is matching—parents shouldn’t have to guess which listings fit their kids or who should see a trunk first.

Constraints

• Matching needs to consider changing sizes over time (current vs outgrown).
• Sellers need a low-friction listing flow (photos + sizes + condition).
• Buyers need trust: fair prioritization, clear time windows, predictable access.

What I shipped

• Matching logic that turns user-provided kid profiles into structured size needs
• A queue/priority model so the first-in-queue buyer gets a deadline, then it moves to the next
• Seller + buyer flows that are simple enough to use on a phone quickly

Architecture (high level)

• Domain model for kids, sizes, trunks, and queue entries
• Deterministic ranking rules (match strength) and time-based state transitions
• Event-driven notifications (e.g., “you’re up”, “time window expiring”)

Outcomes

• A matching-first marketplace experience that reduces search burden
• A scalable way to enforce fairness and prioritization without manual moderation