Service · Software development

Custom procurement automation platform development.

Custom procurement technology for purchasing departments that need more than a standard P2P tool can offer. From requisition to invoice matching, with the workflows, approval rules and ERP integrations your organisation actually needs.

P2P

Procurement automation is more than an ERP module.

The standard procurement functionality within Exact, AFAS or Microsoft Dynamics covers the basics, but it falls short once purchasing matures. Multiple approvers per category, location-dependent workflows, supplier-specific catalogue management, three-way matching between PO, goods receipt and invoice, and spend analytics per cost centre: these belong on a dedicated platform designed for procurement, not as a by-product of a financial system.

The large enterprise SaaS suites, including SAP Ariba, Coupa, Jaggaer, Ivalua, Basware, Workday Spend and Microsoft Dynamics 365 Supply Chain, serve the high end very well. For mid-market organisations with annual procurement spend above €10 million, for groups with multi-site purchasing, and for sector-specific workflows, custom development is often a better fit and considerably more affordable. We build Procure-to-Pay (P2P) and Source-to-Pay (S2P) platforms that integrate seamlessly with your ERP, your supplier master data and your existing approval culture, without forcing you to adapt to the process model of an American SaaS vendor.

Procurement automation is not really about buttons or features. It is about the rules your organisation applies: who may approve what, which suppliers are preferred, which categories require three quotes, how a framework agreement is put into effect, and what you do with discrepancies between ordered and invoiced quantities. A platform that makes those rules explicit gives you immediate control over indirect spend, shorter lead times and a stronger negotiating position with suppliers.

What a custom procurement platform delivers.

P2P
Complete Procure-to-Pay flow
3-way
Matching PO, goods receipt & invoice
SBR
Peppol e-invoicing ready
ERP
Deep integration with your existing stack

Three scope options for procurement platforms.

Depending on how deeply you want to automate and which modules your procurement team needs most urgently.

Option 01

Requisition & approval

Compact P2P entry point

Employees submit purchase requests digitally through a simple form: category, cost centre, preferred supplier, budget. Requests are automatically routed to the right approver based on amount, cost centre and category. Managers approve in one click from desktop or mobile, and finance sees the pipeline in real time. An ideal first step if you still work with email or a shared Excel file and want visibility over who is ordering what before the invoice arrives.

Request formApproval workflowBudget checkMobile approvalAudit log
Option 02

Full P2P platform

Mid-market alternative to Coupa

The complete Procure-to-Pay chain in a single platform. Supplier-specific catalogue management with validated product lists, automatic PO generation to suppliers via portal or Peppol, digital goods receipt on site, OCR invoice processing and three-way matching between order, receipt and invoice. Includes spend analytics dashboards that show your procurement manager where the money goes and which categories or suppliers account for the most movement. Designed for organisations that cannot justify the price of Coupa or Ariba but still need the functionality.

CataloguePurchase ordersGoods receiptInvoice OCR3-way matchSpend analytics
Option 03

S2P with sourcing & contracts

Source-to-Pay end-to-end

P2P extended to the strategic side: e-sourcing with RFI, RFQ and RFP tooling to make quotes comparable, e-auction for competitive tenders, supplier relationship management to track supplier performance, and contract management for framework agreements with rates and volume commitments. For organisations that want to digitise their entire procurement strategy, from market demand to payment, and that want to retain control over supplier selection rather than hand it over to a SaaS suite.

e-Sourcinge-AuctionSRMContract mgmtMulti-siteWwft screening

What the platform offers as standard.

The modules that appear in almost every P2P project, regardless of sector.

Digital requests

Employees submit purchase requests via web or mobile, with category and cost centre.

Approval workflows

Multi-step approval with escalation, delegation and mobile sign-off for managers on the move.

PO generation

Automatic purchase orders sent to suppliers via portal, email or EDI/Peppol integration.

Three-way matching

Purchase order, goods receipt and invoice are matched automatically; discrepancies go to review.

Spend analytics

Dashboards by supplier, category, cost centre and site, for the procurement manager.

When custom procurement is the right choice.

Four situations in which an in-house platform delivers more value than a standard SaaS suite or ERP module. We begin every conversation by asking where your organisation stands. Sometimes the honest conclusion is that a Coupa, Mercell or Negometrix is a better fit, and in that case we say so.

Scale

Mid-market wants P2P without an enterprise licence

You've outgrown manual Excel sheets or paper receipt books, but Coupa, SAP Ariba or Ivalua are disproportionately expensive at your scale, often including mandatory implementation partners and annual user licences that add up fast. Custom software covers seventy to eighty per cent of that functionality, focused on the modules you actually use, without paying for functionality that isn't relevant at your scale.

Industry

Sector-specific purchasing flows

Construction works with bill-of-quantities integration and project-based purchasing per site. Healthcare requires medical approval, GDP compliance and lot tracking. Government and semi-government bodies must follow public procurement procedures with an audit trail. Manufacturing wants bills of materials linked to production planning. Retail needs category management for CPG purchasing. No off-the-shelf SaaS covers these flows without heavy and expensive customisation.

Locations

Multi-site with rules per location

Groups with multiple BVs, branches, business units or international entities often have their own purchasing rules, supplier pools and approval hierarchies per location. A single platform with location context means a request in Rotterdam follows different approvers than the same request in Eindhoven, while group finance still sees the total spend picture and manages framework contracts centrally.

Integration

Supplementing limited ERP procurement

Exact and AFAS have basic purchasing modules that suffice for SMEs but fall short for procurement-mature organisations. Dynamics 365 SCM is more extensive but heavy and expensive to customise. SAP S/4HANA has the functionality, but its UX is rarely loved by end users. A dedicated procurement layer on top of your existing ERP combines modern UX with data integrity and leaves your financial administration untouched.

Modules we build in a P2P platform.

Requisition. The starting point: an employee submits a purchase request digitally. The form asks for at least category, cost centre, description, quantity, preferred supplier and, if applicable, a quote as an attachment. For recurring items, the requester selects from a validated catalogue so that name, item number and price arrive in structured form.

Approval workflow. Based on amount, category and organisational unit, the platform determines the route: manager, department head, finance and, for strategic categories, procurement. Multi-step approval, parallel approvers, delegation during absence and escalation when requests stall. Every action is recorded in an audit log that clearly shows who approved what and when, which is especially valuable in regulated sectors.

Purchase order. Once a request is approved, the platform automatically generates a PO and sends it to the supplier: via a vendor portal where the supplier logs in themselves, by email with a PDF, or via EDI or Peppol for suppliers who exchange invoices electronically. The PO contains all the relevant details: supplier, items, prices, delivery address, requested delivery date, cost centre and general ledger account.

Goods receipt. When the order arrives, the warehouse staff member or the requester records the receipt. Complete, partial, or with discrepancies, everything is logged, with photographic evidence where needed. Goods receipt forms the second leg of the three-way match.

Invoice processing. Incoming invoices are scanned (OCR, or received directly via Peppol as structured data), matched to the correct PO and goods receipt, and reconciled automatically. A full match sends the invoice through for payment; a discrepancy triggers a review flow. This is where most manual finance work disappears.

Supplier onboarding and catalogue. New suppliers go through digital onboarding, including a Chamber of Commerce (KvK) check, Wwft screening, upload of insurance and certificates, and approval by procurement or finance. Approved suppliers gain access to a vendor portal and, where relevant, a validated catalogue that appears in the request form.

Contract management and compliance. Framework agreements with agreed rates, volume discounts and volume commitments are recorded in the platform, so the system applies the correct prices automatically and shows you how far you are into a framework contract. Compliance modules cover Wwft screening, SBR-Peppol e-invoicing, GDPR-compliant data processing and sector-specific regulations.

Spend analytics. Dashboards that show where the money goes: by supplier, category, cost centre, location and approver. This is what your procurement manager relies on for strategic decisions: which categories deserve attention, which suppliers represent a high risk because you place too much business with them, and where the tail spend sits that could be consolidated.

Not yet sure about a large project?

Test your idea first: a working prototype in 1 day

With OneDayBuild, we turn your idea into something tangible in one day for €1,150, so you can see whether further development is worth the investment. Decide to go ahead with the full build? Then we credit the full cost.

Explore OneDayBuild →

How an engagement works.

01Introduction→ 02Process mapping→ 03Build in sprints→ 04Module-by-module rollout
Introduction

Procurement scan

We map your current procurement process: requests, approvers, ERP, suppliers.

Process mapping

Workflow design

A workshop with procurement, finance and IT to define the desired P2P flow for each category.

Build

Iterative sprints

Each sprint delivers a working module: requisitioning, approval, PO, matching, analytics.

Rollout

Phased go-live

First one category or location, then scale up. Training for key users and end users.

Tech stack we work with.

No vendor lock-in: for each project we choose a stack that suits your existing IT landscape and the scale of your procurement. API integrations with your ERP, supplier portals and invoicing systems are standard parts of the scope.

Frontend & UX
Next.jsReactVueAstro
Backend & data
Node.jsPython.NETPostgreSQLElasticsearch
Integration & compliance
PeppolSBREDISSO/Azure ADOCR (AWS Textract / Azure)

Connecting to the rest of your procurement chain.

A procurement platform rarely stands alone. Our projects usually connect with adjacent systems.

Suppliers

Vendor portal

External suppliers log in to confirm POs, announce deliveries and upload invoices. See also our page on building a vendor portal.

Orders

Order management

For trading and manufacturing companies, procurement connects to a custom order management system that drives the sales side.

Documents

Contract & document flow

Purchase contracts, framework agreements and compliance documents are often handled through a separate document workflow automation.

Scale

Enterprise context

For groups with multiple ERPs or international entities, we look at broader enterprise software development rather than a standalone platform.

Frequently asked questions about procurement automation.

Do you replace SAP Ariba, Coupa or Jaggaer?
For large enterprise organisations already invested in Ariba, Coupa, Jaggaer, Ivalua or Basware, we usually advise keeping that suite — its breadth and ecosystem integrations are hard to match at that scale. We come into play for mid-market organisations that cannot or do not want to justify the Coupa price, for industry-specific flows that off-the-shelf tools don't fit, and as a complement to an ERP with limited procurement functionality.
How does digital approval of purchase requests work?
An employee submits a request through a simple form with category, cost centre and preferred supplier. Based on the amount, category and organisational structure, the platform automatically routes it to the right approver — manager, finance or, where relevant, procurement. The approver receives a notification (email, Teams, mobile) and either approves or returns it with comments. Multi-step approval, delegation during holidays and escalation for stalled requests are standard.
Can employees submit purchase requests digitally, including on the go?
Yes. The request form is mobile-first: a field engineer can request materials on site, and a project manager can propose a new supplier while travelling. Manager approvals are also mobile, often via a direct link in the notification. It works on iOS, Android and desktop browsers, and depending on scope a dedicated mobile app can be added.
How deep does the ERP integration go?
As deep as is useful. By default, we integrate cost centres, general ledger accounts, supplier masters, items, VAT codes and approval hierarchies bidirectionally with your ERP: Exact Online, AFAS, Microsoft Dynamics 365, SAP S/4HANA, Oracle, Workday or legacy AS/400 systems. Purchase orders and approved invoices are written back to the ERP so that your financial records remain the source of truth. We almost always work through a dedicated integration layer (its own API gateway or a middleware component), so that a future ERP migration doesn't require rebuilding the platform and you aren't tied to a specific ERP version.
How does supplier onboarding and the portal work?
New suppliers go through digital onboarding with a KvK (Chamber of Commerce) check, Wwft screening and upload of required documents (insurance, certificates, bank details). Once approved, they log in to a vendor portal where they confirm POs, announce deliveries and submit invoices — preferably via Peppol/SBR e-invoicing. This is often a separate sub-project; see our page on vendor portals.
Do you support public tender procedures?
For public-sector tenders, Dutch organisations usually work with Negometrix, Mercell or TenderNed, so we integrate with those rather than rebuilding that functionality ourselves. For private tenders (RFI, RFQ, RFP, e-auction) we do build it: supplier invitations, comparison matrix, weighted scoring and automated reporting all fall within the S2P scope.
What determines the cost of a procurement platform?
The biggest factors are: the number of modules you need (requisition and approval only, full P2P, or S2P with sourcing and contracts), the depth and number of ERP integrations, the number of sites and their workflow variants, whether a vendor portal is included, the volume and complexity of your catalogue, and compliance requirements such as Wwft screening, sector-specific regulations and GDPR. We almost always work in sprints: after the first workshop you have a realistic picture of scope and investment, and you can release modules in phases rather than committing to everything at once, which spreads the risk and lets you learn during rollout.

Talk to us about your procurement platform.

A free, no-obligation half-hour introductory call. We listen to your purchasing flow, look at your existing ERP and supplier landscape, and give you direction you can actually use, even if the conclusion is that an off-the-shelf SaaS suite is a better fit than custom development.

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