Warehouse Management System Development

Warehouse accuracy requires a system that reflects how your warehouse actually works

Most warehouse management problems trace back to the same root cause: the WMS was configured for a generic warehouse, not yours. Inventory location management doesn't match your physical layout, pick routes don't follow the most efficient path through your aisles, and the system doesn't account for the way you batch orders or assign pickers to zones. When the system doesn't reflect reality, warehouse teams work around it, managing locations by memory, handwriting pick lists, using whiteboards for wave planning. Custom WMS development starts with your warehouse: your physical layout, your product mix, your slotting rules, and your pick strategy.

  • Receiving and putaway workflows with directed location assignment based on your slotting rules

  • Pick-pack-ship with wave management, batch picking, and carrier label generation

  • Cycle counting programs that maintain inventory accuracy without shutting down the warehouse

  • Multi-client billing for 3PLs: storage charges, handling fees, and activity-based billing per client

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See our work

The problem

Sound familiar?

  • Warehouse team managing inventory locations and pick routes by memory because the WMS doesn't reflect the actual warehouse layout?

  • Stock discrepancies only discovered at month-end stocktake, by which point fulfilment errors have already reached customers?

Short answer

RaftLabs builds custom warehouse management systems covering receiving and putaway, inventory location management, pick-pack-ship workflows, cycle counting, barcode and RFID scanning, wave management, multi-client billing for 3PLs, and carrier label generation. Most WMS projects ship in 10-14 weeks at a fixed cost with full source code ownership.

Key takeaways

  • Directed putaway uses a slot-scoring algorithm factoring velocity class, weight, cube, and temperature zone, so every SKU lands in an optimal, confirmed bin position rather than wherever fits.
  • Rolling cycle counting covers every location over a 4-8 week period without a warehouse shutdown, catching accuracy problems continuously instead of at an annual stocktake.
  • Multi-client 3PL billing generates invoices directly from logged WMS activity, storage, handling, value-added services, replacing a multi-day spreadsheet exercise with a review-and-export workflow under an hour.
  • A focused WMS covering receiving, pick-pack-ship, and cycle counting runs $40,000-$90,000; a 3PL platform with multi-client billing and RFID runs $90,000-$200,000.

Trusted by

Vodafone logo
Aldi logo
Nike logo
Microsoft logo
Heineken logo
Cisco logo
Calorgas logo
Energia Rewards logo

WMS delivery, by the numbers

products shipped
100+
industries served
24+
cost delivery
Fixed
week delivery cycles
12-14

Warehouse accuracy requires a system that reflects how your warehouse actually works

Custom WMS development starts with your warehouse: your physical layout, your product mix, your slotting rules, and your pick strategy, built around the way you actually operate rather than a vendor's idea of what a warehouse looks like.

Capabilities

What we build

  • 01
    Receiving and putaway

    ASN-matched receiving with slot-scoring directed putaway and cross-docking to open orders where they exist.

    Built with
    Zebra MC3300 · TC52
  • 02
    Inventory location management

    Pick-face-level location master with slotting review reports and mixed-SKU capacity management.

    Built with
    RFID
  • 03
    Pick-pack-ship workflows

    Configurable wave planning across discrete, batch, zone, and cluster picking, with unified carrier label generation.

    Built with
    EasyPost
  • 04
    Cycle counting and stocktake

    Rolling 4-8 week counting cycle with variance-threshold blind recounts and shrinkage-vs-pick-error tracking.

  • 05
    Barcode and RFID scanning

    Task-level barcode validation rejecting mis-picks immediately, with full scan-event audit logging.

    Built with
    GS1-128 · SSCC
  • 06
    Multi-client billing for 3PLs

    Activity-based invoicing straight from the WMS transaction log, with client portal visibility into accrued charges.

    Built with
    Xero · QuickBooks

How we work

From scope to live WMS

  1. Week 1
    01

    Layout and client mix scoping

    We map your warehouse layout, your client mix, and where your current system fails. You leave week 1 with a written scope document and a fixed-price quote.

  2. Weeks 2-5
    02

    Slotting and billing model design

    Location hierarchy, pick strategy, and 3PL billing rate cards designed against your actual operation.

  3. Weeks 6-13
    03

    Build and integrate

    Receiving, pick-pack-ship, and cycle counting built in parallel, tested against real warehouse scenarios.

  4. Final 2-3 weeks
    04

    Launch and team training

    Warehouse staff and 3PL clients trained on the new workflow before full rollout.

Why us

Why 3PLs and distributors choose RaftLabs

  • 01
    Senior engineers build what they scope

    The engineers who assess your warehouse layout also build the solution. No bait-and-switch, no offshore handoff after the contract is signed.

  • 02
    Fixed price before development starts

    We scope the work, calculate the cost, and lock it in writing before any development starts.

  • 03
    9 years and 100+ products shipped

    Clients include Vodafone, T-Mobile, Aldi, Nike, Cisco, and Lockheed Martin. Track record building WMS and logistics platforms.

  • 04
    Built around your slotting, not a vendor template

    The system reflects your actual velocity classes, zones, and pick strategy from day one.

  • 05
    Billing generated from real activity, not a spreadsheet

    3PL invoices pull directly from the transaction log with no manual compilation.

Have a warehouse management project?

Tell us your warehouse layout, your client mix, and where your current system fails. We'll scope the right platform and give you a fixed cost.

Talk about your WMS project

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Frequently asked questions

When your operation has an unusual physical layout the slotting engine can't model, a multi-client billing model with complex rate structures, a proprietary ERP the integration layer can't connect to, conveyor/sorter integration via PLC Modbus TCP, or product handling (serial-tracked, lot/expiry, catch-weight) that requires custom picking logic. If you've spent six months configuring an off-the-shelf platform and still work around it daily, that's a reliable signal.

A structured cycle counting program divides the warehouse into count zones and counts a small number of locations each day, cycling through every location over a rolling 4-8 week period without a shutdown, with variance thresholds triggering a supervisor blind recount before adjustment.

Yes. Order source integration (Shopify, Magento, WooCommerce, custom OMS), carrier integration via EasyPost covering parcel and LTL in one interface, and ERP/accounting integration (SAP WM/EWM, NetSuite, Xero, QuickBooks).

A focused WMS covering receiving, pick-pack-ship, cycle counting, barcode scanning, and carrier label generation typically runs $40,000 to $90,000. A 3PL platform with multi-client billing, client portals, and RFID integration typically runs $90,000 to $200,000.

Work with us

Tell us what you need. We'll tell you what it would take.

We scope Warehouse Management System Development in 30 minutes. You walk away with a clear cost, timeline, and approach. No commitment required.

  • Scope and cost agreed before work starts. No surprises. No obligation.
  • Working prototype within 3 weeks of kickoff.
  • Pay by milestone. You see progress before each invoice.
  • 60-day post-launch warranty. Bug fixes, UI tweaks, and deployment support. No retainer.
  • All conversations are NDA-protected.

Go deeper

Browse our case studies

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