Custom Inventory Management Software

Off-the-shelf inventory management software is built for the average warehouse, the average product catalogue, and the average supply chain. If your operation needs multi-location stock, kitting and assembly, lot and serial tracking, industry-specific compliance, or a sync with systems your vendor doesn't support, you end up working around the tool.
We build custom inventory management software around your product catalogue, your fulfilment workflow, and your integrations, not a generic inventory management system you bend your operation to fit.

  • Custom inventory management systems built for your specific stock structure and fulfilment operation

  • Multi-location inventory, lot tracking, serial tracking, and kitting/assembly support

  • Integration with your ERP, WMS, e-commerce platform, and supplier systems

  • Full source code ownership, no per-location or per-user SaaS pricing that scales against you

20,000+ transactions in a day Retail operations2,000+ shipments in year one Multi-carrier logistics0% order errors Order management

The problem

Sound familiar?

  • Off-the-shelf system not supporting your product structure, lot tracking, or multi-location requirements?

  • Manual stock reconciliation between systems that should be integrated but aren't?

Short answer

RaftLabs builds custom inventory management software for multi-location businesses in the US, UK, Europe, Canada, and the UAE. It covers real-time stock across warehouses, barcode and RFID scanning, reorder points, lot and serial traceability, cycle counts, and ERP, POS, and WMS sync. We launch a validated v1 first, then grow it.

Key takeaways

  • Custom inventory management software built for your specific stock structure, not a generic off-the-shelf system you adapt your operation to fit.
  • Multi-location stock, barcode and RFID scanning, reorder points, cycle counts, and lot and serial tracking are included where your operation needs them.
  • ERP, WMS, POS, e-commerce, and supplier system sync is scoped and built for each project.
  • Full source code ownership is transferred on completion with no per-location or per-user SaaS pricing that scales against you.
  • Delivery timeline: a focused single-location v1 launches in 8 to 10 weeks; a multi-location platform with ERP sync reaches its first validated release in 12 to 16 weeks, then grows from there.
  • Cost range: a focused inventory system runs $20,000 to $60,000; a full platform with lot tracking and ERP financial posting runs $60,000 to $150,000.
  • Compliance requirements including FDA lot traceability, pharmaceutical GMP, and food safety are handled within the build.

Trusted by

Vodafone logo
Aldi logo
Nike logo
Microsoft logo
Heineken logo
Cisco logo
Calorgas logo
Energia Rewards logo
GE logo
Bank of America logo
T-Mobile logo
Valero logo
Techstars logo
East Ventures logo
TuneClub logo

Proof

Since 2015
shipping production software across retail, logistics, and regulated supply chains
RaftLabs delivery record
4.9/5
average client rating across delivered projects
Clutch, verified reviews
Fixed price
scope and cost agreed in writing before any development starts
Every RaftLabs engagement

Your inventory operation is specific. Your inventory management software should be too.

A distribution centre with 50,000 SKUs across six warehouses needs something different from a pharmaceutical manufacturer tracking lot expiry across a regulated supply chain, which needs something different again from an electronics assembler managing components for kitting. Off-the-shelf inventory management systems make trade-offs to serve all three. Those trade-offs may not match how you actually work.

Custom inventory management software makes none. It's built for your product catalogue, your locations, and your compliance regime.

According to IHL Group's inventory distortion research, out-of-stocks and overstocks cost retailers roughly $1.77 trillion worldwide every year. When your warehouse inventory software doesn't fit your real stock structure, the losses compound: bad data ties up working capital in excess stock and sends customers elsewhere when a line runs short.

Capabilities

What we build

  • 01
    Multi-location inventory management

    Unified inventory visibility across warehouses, retail locations, 3PL partners, and in-transit stock, with location-specific stock levels, transfer workflows, and allocation rules that decide which location fulfils each order. Reorder automation fires a replenishment suggestion or a direct PO when stock crosses its threshold, with safety stock sized to actual demand variability. Cross-location reporting covers committed stock, available-to-promise, and stock in transit.

  • 02
    Lot, serial, and batch tracking

    Full forward and backward traceability for lot-tracked and serial-tracked inventory: supplier lot number capture at receipt, FIFO/FEFO rotation enforcement, expiry date management, and lot-specific quality holds. Serial number tracking runs from receipt through sale with full chain of custody, so recall management can identify every location and customer order containing a specific lot in seconds.

  • 03
    Kitting and assembly management

    Bill of materials management for kits and assembled products, with multi-level BOM support for assemblies that consume sub-assemblies. Component stock is committed the moment a kit order lands, so parallel orders cannot over-allocate the same inventory. Assembly work orders generate pick lists, deduct components by FIFO or FEFO rotation, and book the finished good to stock, with handheld scanning verifying each pick before the kit ships.

    Built with
    Zebra · Honeywell scanners
  • 04
    Purchase order and receiving

    Purchase order creation, supplier confirmation tracking, advance ship notice processing, and goods receipt with variance detection. Three-way match validation across PO, ASN, and receipt runs a discrepancy workflow for quantity and condition differences, with lot and serial capture at receipt and supplier performance tracked on on-time delivery, fill rate, and quality rejection rate.

  • 05
    Stock counting and reconciliation

    Cycle count scheduling driven by ABC/XYZ classification: A-class items counted monthly, C-class semi-annually, with count tasks assigned to operators by zone. RFID bulk counting covers entire pallets without item-by-item scans. Blind counts and automatic recount triggers keep results honest, and variances above your tolerance wait in an approval queue. Dead stock identification and full wall-to-wall counts are also supported.

    Built with
    Zebra or Honeywell · RFID · Barcode
  • 06
    Reporting and demand planning

    Inventory performance reporting: stock turn by category, days of cover, slow-moving and dead stock identification, and shrinkage analysis. Demand-based reorder point calculation using historical sales velocity and supplier lead time, plus replenishment recommendation reporting to support buying decisions and custom reporting on the metrics your operation tracks.

How we work

From scope to shipped

Every project follows the same four phases. Scope is locked and price is fixed before development starts.

  1. Week 1
    01

    Discovery and scope

    We map your inventory workflows: receipt, putaway, picking, packing, despatch, returns, and counting. We identify gaps between current operations and the system you need. You leave week 1 with a written scope document and a fixed-price quote. No development starts without your sign-off.

  2. Weeks 2-3
    02

    Data migration and integration design

    Switching inventory systems requires migrating current stock quantities, product catalogue, supplier records, and historical transaction data. We plan the migration during scoping, what to migrate, how to validate against source records, and how to manage cutover without a gap period. Integration architecture is designed here too, before any build starts.

  3. Weeks 4-12
    03

    Build, integrate, and QA

    Working software at a staging URL by the end of sprint one. Bi-weekly demos. We test against your real product catalogue and operational scenarios before go-live: receiving a multi-lot shipment, processing a sales order that depletes multiple lots, conducting a cycle count with variances, and generating a lot recall report. QA runs in parallel with every sprint.

  4. Weeks 12+
    04

    Launch and post-launch support

    Production deployment with monitoring activated on launch day. 8 weeks of post-launch support included in every project.

Why us

Why teams choose RaftLabs

  • 01
    Senior engineers build what they scope

    The engineers who assess your inventory problem also build the solution. No bait-and-switch, no offshore handoff after the contract is signed. The team you meet in week 1 ships in week 12.

  • 02
    Fixed price before development starts

    We scope the work, calculate the cost, and lock it in writing before any development starts. A scope change is a change request: priced, agreed, or dropped. It never absorbs into the project and appears on the final invoice.

  • 03
    Shipping production software since 2015

    Clients include Vodafone, T-Mobile, Aldi, Nike, Cisco, and Lockheed Martin. Track record across AI, SaaS, mobile, automation, and enterprise platforms in retail, logistics, fintech, healthcare, and hospitality.

  • 04
    Compliance built in from the start

    GDPR, HIPAA, FDA lot traceability, SOC 2 compliance requirements are scoped in week 1, not retrofitted before launch. We have shipped HIPAA-compliant systems for US healthcare clients and GDPR-compliant products for European markets.

Process

How we build inventory management systems

  • 01
    Operations workflow design

    Before building, we document your current inventory workflows, receipt, putaway, picking, packing, despatch, returns, and counting, and identify the gaps between current operations and the system you need. Software that matches your actual workflows takes less user training and produces cleaner data than software that imposes a generic workflow.

  • 02
    Data migration planning

    Switching inventory systems requires migrating current stock quantities, product catalogue, supplier records, and historical transaction data. We plan the migration during scoping, what to migrate, how to validate against source records, and how to manage the cutover so your operation doesn't have a gap period. Data migration is often where inventory implementations fail.

  • 03
    Integration with your ecosystem

    Inventory management lives at the intersection of purchasing, warehousing, sales, and finance. We integrate the system with your ERP for financial posting, your e-commerce platform for order management, your WMS for warehouse operations, and your supplier systems for purchase order and shipment data exchange.

    Built with
    EDI · API
  • 04
    Testing against real data and scenarios

    We test the inventory system against your real product catalogue and operational scenarios before go-live: receiving a multi-lot shipment, processing a sales order that depletes multiple lots, conducting a cycle count with variances, and generating a lot recall report. Testing against edge cases in your actual operation, not generic test scenarios.

What clients say

What clients say

Three-year average engagement. Founders and operators describing the work in their own words. No marketing varnish.

Gil Nugraha
Gil Nugraha
Indonesia flagIndonesia
Founder at UrShipper

I definitely recommend RaftLabs, especially to solo founders like me. Their clear communication and detailed discussions have always helped me make better decisions.

Stay on topic

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Frequently asked questions

Custom inventory management makes sense when your product structure is complex (kits, assemblies, lot or serial number tracking) and off-the-shelf systems handle it poorly. It also makes sense when you operate across multiple locations and need a unified stock view, when SaaS pricing at your scale has become unsustainable, or when industry compliance requirements (FDA lot traceability, pharmaceutical GMP, food safety) need specific data capture. Many businesses reach a point where customisation costs and workarounds exceed the cost of building exactly what they need.

Lot tracking is the ability to trace a product back to the specific production batch it came from, and to track that lot through your supply chain from receipt through sale. You need it when quality recalls require identifying all units from a specific run, when regulations mandate batch traceability (FDA, pharmaceutical GMP, food safety), or when your costing requires FIFO or FEFO rotation by lot. We implement lot tracking with full forward and backward traceability, forward trace from a lot to all sales, backward trace from a sale to the originating lot and supplier.

Custom inventory management integrates with your ERP (SAP, Oracle, NetSuite, Microsoft Dynamics) for financial posting and purchase orders, your e-commerce platform (Shopify, Magento, WooCommerce) for order management and stock deduction, your WMS for warehouse operations, and your supplier systems via EDI or API for purchase order acknowledgement and advance ship notices. We design the integration architecture during scoping and implement the right approach for each system, whether API, EDI, or database integration for on-premise systems.

A focused system covering one warehouse, core stock management, basic supplier and purchase order management, and integration with one e-commerce platform typically runs $20,000 to $60,000. A full platform with multi-location management, lot tracking, kitting, WMS integration, and ERP financial posting typically runs $60,000 to $150,000. Cost depends on product structure complexity, number of locations, and compliance requirements. We scope every project before pricing it.

We launch a validated v1 first, then grow it. A focused single-location v1 with standard stock management and one integration typically launches in 8 to 10 weeks. A multi-location platform with lot tracking, kitting, WMS integration, and ERP financial posting reaches its first validated release in 12 to 16 weeks, then iterates from there. Complexity drivers include the number of locations, compliance requirements, and integration depth. Timeline and cost are locked before development starts.

Yes. We sign NDAs before any project discussion involving sensitive business data, supplier relationships, or proprietary inventory logic. NDA signing happens in the first meeting, before we see any operational data. Full source code ownership is also transferred on project completion.

Work with us

Ready to scope your inventory management software?

A 30-minute call to walk through your stock operation. A costed scope and timeline follow within two business days. No commitment.

  • 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.