100 Marketplaces resources for developers

Implement Express accounts to offload KYC and onboarding to Stripe while maintaining control over the payout schedule.

Calculate and deduct platform commissions using the 'application_fee_amount' parameter in Stripe PaymentIntents.

Set 'payout_schedule' to manual or use a 7-14 day delay to ensure buyer satisfaction before releasing funds to sellers.

Architect checkout flows that create separate 'Transfer' objects for each vendor from a single customer payment.

Listen for 'payout.paid' and 'payout.failed' events to update internal vendor balances and ledger states.

Use Stripe Tax or Avalara to automate 1099-K generation and sales tax calculation across different jurisdictions.

Implement a logic flow to claw back funds from seller Connect accounts when a buyer initiates a dispute.

Utilize Stripe's 'on_behalf_of' attribute to charge customers in their local currency while paying sellers in theirs.

Maintain a double-entry bookkeeping system in PostgreSQL to track internal credits, debits, and platform fees.

Integrate Stripe Billing to charge sellers a monthly SaaS fee for premium listing features or lower commission rates.

Configure '_geoloc' attributes in Algolia to allow users to filter marketplace listings by radius or bounding box.

Utilize 'tsvector' and 'tsquery' for low-latency search on listing titles and descriptions without external dependencies.

Implement a decay function in your SQL queries to ensure new listings get visibility alongside top-rated sellers.

Build a schema-less attribute system in Supabase using JSONB to allow category-specific filters like 'Size' or 'Color'.

Use Redis sets to track and update item availability instantly, preventing double-booking in rental marketplaces.

Use pgvector and OpenAI embeddings to suggest 'similar items' based on semantic descriptions rather than keywords.

Combine Cron jobs with Resend to notify buyers when new supply matching their specific filters is uploaded.

Use Next.js Dynamic Routes and Metadata API to generate unique, indexable URLs for every marketplace listing.

Automate marketplace image resizing and format conversion (WebP) to ensure fast loading search result pages.

Log search result clicks to a 'search_analytics' table to identify and demote low-quality or misleading listings.

Implement a weighted average formula to prevent a new seller with one 5-star review from outranking a veteran with 4.8 stars.

Require sellers to upload government ID and perform a biometric check before their listings go live.

Pipe listing descriptions through the OpenAI Moderation API to flag prohibited items or offensive language.

Link the review system to the 'orders' table to ensure only users who completed a transaction can leave feedback.

Use regex patterns or LLMs to detect and block phone numbers or emails in marketplace chats to prevent off-platform deals.

Track the delta between buyer inquiry and seller response to display 'Typically responds in X hours' on profiles.

Use Clerk to manage distinct 'Buyer', 'Seller', and 'Admin' permissions and dashboard views.

Build a dedicated admin UI for support staff to review chat logs and issue partial or full refunds.

Enforce 2FA for sellers via Clerk or Supabase Auth to prevent account takeovers and fraudulent payouts.

Display 'Recent Sales' or 'Joined X years ago' on seller profiles to build social proof for new buyers.