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DL-FOR-01 · For sellers

Custom software for marketplace sellers

Software that fits how you sell, on every channel: order routing, repricing, inventory sync and reporting across Amazon, Walmart, eBay, Allegro, Mercado Libre, Shopify and your own store. Once built, it's yours.

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51.4344.0060°01AUDIT02STABILIZE03BUILD04SECUREGENERAL ARRANGEMENT · FOR SELLERS

Where selling on several channels gets expensive

  1. 1.

    A separate tool, login and subscription for every marketplace and store.

  2. 2.

    Stock and prices drifting apart between channels.

  3. 3.

    Manual, click-heavy work in orders, pricing and disputes.

  4. 4.

    Integrations that break quietly when a marketplace changes its API.

Orders, listings and reports from the marketplaces and the seller's own store reach the seller's own tools through each channel's API, with ad data alongside; the tools update the ERP or 3PL, Sheets or BI and send alerts, replacing manual report exports.SALES CHANNELSauthorisedorders / adsCSV downloadsMARKETPLACESAmazon / Walmart / eBaySTORE AND ADSShopify / ad APIsCHANNEL APISOrders / listings / reportsYOUR TOOLSRepricer / sync / reportsERP / 3PLOrders / stockSHEETS / BIReportingALERTSEmail / dashboardMANUAL EXPORTSToday
  1. 01MARKETPLACESAmazon / Walmart / eBayCHANNEL APISOrders / listings / reports
  2. 02CHANNEL APISOrders / listings / reportsYOUR TOOLSRepricer / sync / reportsauthorised
  3. 03STORE AND ADSShopify / ad APIsYOUR TOOLSRepricer / sync / reportsorders / ads
  4. 04YOUR TOOLSRepricer / sync / reportsERP / 3PLOrders / stock
  5. 05YOUR TOOLSRepricer / sync / reportsSHEETS / BIReporting
  6. 06YOUR TOOLSRepricer / sync / reportsALERTSEmail / dashboard
  7. 07STORE AND ADSShopify / ad APIsMANUAL EXPORTSTodayCSV downloads
Fig. S1From every channel to tools you ownOrders, listings and reports from the marketplaces and the seller's own store reach the seller's own tools through each channel's API, with ad data alongside; the tools update the ERP or 3PL, Sheets or BI and send alerts, replacing manual report exports.Scale NTS

What the engagement covers.

  1. 01

    Audit: know what you run

    Map your channels, tools, scripts and API access before spending on new software.

  2. 02

    Stabilize: fix what breaks

    Repair integrations that fail quietly, move legacy code such as Amazon MWS to current APIs and cut API costs.

  3. 03

    Build: tools you own

    Order routing, repricers, inventory sync and reporting across marketplaces and your store, or on DataDoe for Amazon data.

  4. 04

    Secure: protect accounts and data

    Access control and customer-data handling that meet each marketplace's policies.

How it runs.

  1. P01

    Discovery

    A call about your business, its bottlenecks and what the tool must do.

  2. P02

    Estimate

    Scope, timeline and cost in writing.

  3. P03

    Develop

    Iterative build and testing, with updates at every step.

  4. P04

    Maintain

    Fixes, new features and support as the marketplaces change.

What you get.

ItemDeliverableQty

  1. 01Software built for your accounts and processes1
  2. 02Full source code, owned by you, with no subscription1
  3. 03Training and documentation for your team1
  4. 04Optional maintenance1

Stack12

  • Amazon SP-API
  • Amazon Ads API
  • Walmart Marketplace API
  • eBay API
  • Allegro API
  • Mercado Libre API
  • Shopify API
  • DataDoe
  • AWS Lambda
  • Node.js
  • TypeScript
  • Google Sheets

Related projects.

  1. DL-009Amazon MWS to SP-API migration for a top 20 sellerBig Fly · USA02Stabilize03Build
  2. DL-021One integration hub for an apparel manufacturer's sales channelsName withheld · US East03Build02Stabilize
  3. DL-056Cross-border API architecture for an Amazon and Walmart US sellerName withheld · Argentina01Audit02Stabilize
  4. DL-050Mercado Libre and Amazon Brazil integration with SAP Business OneName withheld · Brazil03Build02Stabilize
  5. DL-032Multichannel order and inventory sync for a fitness brandName withheld · Canada03Build02Stabilize
  6. DL-007Custom repricing software for a European sellerPakTrade · Austria03Build
All case studies

Questions engineers ask us.

Q01Should I use DataDoe or a custom tool?

If you want your Seller Central, Vendor Central and Ads data joined and ready for AI agents, DataDoe, a Deltologic product, does that out of the box. A custom tool makes sense when your process, rules or integrations are specific to you, and it can be built on top of DataDoe.

Q02Who owns the software after you build it?

You do. Once the project is delivered, you legally own everything needed to run, maintain or extend it: source code, scripts, project files and executables.

Q03How do you price a project?

We give a transparent estimate based on our hourly rate, with scope, timeline and cost set out before work starts. You can pay in monthly instalments; larger projects usually start with a down payment.

Q04We have an idea but not the full feature list. Can you help define it?

Yes. We run workshops of 16 to 80 hours to work through the functionality with you and design the concept before anything is built.

Q05Our project is not about marketplaces or e-commerce. Can you still help?

Yes. Marketplace commerce is our specialisation, but we also build for logistics, agriculture, automotive and other industries.

Related services.

Bring us the bottleneck

A nagging problem on one channel or across all of them: tell us, and we'll scope what it takes to build.

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