// Custom ERP and Internal Systems

A system built around
your process, not the other way round.

Off-the-shelf ERP forces you to bend your operations to fit the software. We build the system around how you actually work — inventory, finance, orders, reporting. Your source code, modular .NET architecture, no vendor lock-in.

Request a consultation Built on real production systems: a complete financial and invoicing engine, inventory and order logic, real-time operations.
// Where it breaks

Three reasons an off-the-shelf ERP ends up hurting more than it helps.

SAP, Dynamics or cheaper alternatives promise a universal solution. In practice it means you buy someone else's process and spend three years bending it back — or hire an agency that bolts on a module and disappears.

You bend your process to fit the software, not the other way round

An off-the-shelf ERP has its five workflows, and you have to fit into one of them. Exceptions in your operations — a specific margin, an unusual inventory setup, a different contract type — end up in a spreadsheet next to the system, because it "doesn't fit" the standard module.

Customization without source code is a ticking clock

You extend an off-the-shelf ERP through a vendor SDK or low-code layer you don't own. A platform update breaks your customization, the module vendor shuts down, and you have no access to the code to fix it yourself.

The vendor disappears, the system stays — and only they understood it

An agency builds your internal system, hands over documentation and leaves. A year later you need a change and discover that understanding code without the original context is slow and expensive. The architect who built it is already on a different contract.

// How we build it

Modular .NET architecture built around your real operations.

We don't start from a template of modules wired together afterwards. We model your actual process — inventory, orders, finance, reporting — and build a system that reflects it 1:1, not an approximation.

01

Your source code, no lock-in

The system is yours. No license for someone else's platform, no dependency on an SDK vendor. You get the code in your own repository and can hire anyone to continue working on it — even if it's not us.

02

A dedicated financial and invoicing engine

Receivables, transactions, monthly reports, contract PDF generation — built as domain logic tailored to your accounting and billing model, not a generic module that covers 80% of cases and leaves the rest to you.

03

Inventory and order logic on your own rules

Reservations, allocation, the order → inventory → invoicing chain is modeled on how you actually operate — not on how an off-the-shelf ERP vendor imagined inventory should work.

04

Modular architecture, not a single monolith

We build the system from separate modules (finance, inventory, orders, reporting) that can be extended independently. Adding a new module doesn't mean rewriting the whole system.

05

Real-time operations, not overnight batch processing

Where it matters — order status, inventory availability, an operational dashboard — data is current instantly, not after an overnight batch import from the ERP.

06

A direct architect, a long-term relationship — not a one-off delivery

Custom ERP isn't a project with a handover document and a goodbye. It's a long-term relationship with an architect who understands your business and stays available when operations change — not an agency that delivers and disappears, leaving the system maintained by someone who doesn't understand it.

// Proof

Built on real production systems, not a demo.

Carivio is a complete taxi platform with its own financial engine — receivables, transactions, monthly reports — built in 4 months. Before SolutionBox, at Atlas Copco we optimized a SAP data pipeline: SQL cut from 15,000 to 3,000 lines, moved to event-driven processing on Azure Functions, runtime recovered from several days back to roughly 4 hours from the EU and 6 hours from Asia. For TrafinOil we migrated invoicing to Dynamics 365 Business Central through a dependency-ordered sync queue with a status-tracked record queue, not a one-shot script. And at ČSOB we cut contract generation from 2 hours to 3 minutes.

4 months complete operational platform with a financial engine
15,000 → 3,000 lines of SQL after data pipeline optimization
40× faster contract generation (2 h → 3 min)
Read case studies
// FAQ

Common questions about custom ERP and internal systems.

// Contact

Tell us about
your operations.

We'll go through where an off-the-shelf ERP or spreadsheets are holding you back, and suggest what's worth building custom and what isn't. We'll reply within 24 hours with a concrete take, not a generic deck.

Request a consultation