Business context
Trading businesses need a coherent purchasing-to-sales backbone before specialized vertical modules make sense. Shared stock and document patterns prevent each new module from reinventing posting rules.
Work
EH.ERP
Modular trading ERP foundation for purchasing, stock, sales and warehouse workflows. Active development.
Modular Trading ERP FoundationWebActive development
Overview
- A modular foundation intended to host trading workflows — purchasing, stock, sales and warehouse movement — with shared patterns.
- ASP.NET Core MVC and EF Core keep delivery practical while module seams stay explicit.
- Active development means modules are built for concrete trading needs first, then generalized where justified.
- Not positioned as a shrink-wrapped self-service ERP install.
Problem
Without a modular trading core, every vertical rebuilds inventory, purchasing and sales differently, multiplying inconsistencies and slowing delivery.
Intended users
- Purchasing staff registering supplier documents
- Warehouse staff posting receipts and transfers
- Sales staff issuing commercial documents
- Operations managers reviewing stock and movement
Core capabilities
Trading document core
Purchase and sales documents share validation and posting conventions across modules.
Warehouse movement
Receipts, issues and transfers write reconstructable stock history.
Modular expansion path
Vertical modules can plug into the trading core instead of forking stock rules.
Main modules
- Products
- Warehouses
- Purchasing
- Sales
- Stock movements
- Trading reports
Technology stack
ASP.NET Core MVC · SQL Server · EF Core
Architecture summary
- ASP.NET Core MVC application structure
- Service layer for posting and validation rules
- EF Core against SQL Server
- Migration-based schema management
- Role-based authorization on commercial actions
Security considerations
- Role-based access to purchasing, sales and stock actions
- Server-side validation on document posting
- Parameterized EF Core data access
- Environment-separated connection secrets
- Audit fields on critical stock and document changes
Interface gallery
Under DevelopmentCurrent phase
EH.ERP is an EH DESIGN modular trading foundation in active development. Purchasing, stock, sales and warehouse workflows are being built as a shared core. No shrink-wrapped deployment claims are made.
Scope boundaries
- Foundation product — not every vertical module is complete
- Not a full statutory finance suite
- Not marketed for anonymous self-service installation
- Related vertical products may advance on separate timelines
Remaining work
- Deepen purchasing and sales edge cases
- Expand warehouse transfer scenarios
- Stabilize shared posting libraries
- Documentation for module extension patterns
Main workflows
Purchase and receive
Register a supplier document and receive quantities into a warehouse with movement history.
Transfer stock
Move quantities between warehouses with an auditable transfer trail.
Sell and issue
Post a sales document and issue stock from the fulfilling warehouse.
Review trading position
Inspect purchase, sales and movement reports that reconcile to posted documents.
Technical decisions
MVC for foundation speed
Server-rendered MVC keeps early trading screens deliverable without forcing a premature SPA split.
Shared posting conventions
Purchasing and sales reuse stock-posting patterns so modules do not invent incompatible movement rules.
Generalize after proof
Concrete trading needs land first; abstractions are extracted only when repetition justifies them.
SQL Server as record
Relational constraints and indexes protect commercial integrity as volume grows.
Testing approach
- Unit tests for stock posting from purchase and sales documents
- Integration tests for transfer workflows
- Authorization denial checks for restricted roles
- Report reconciliation against movement tables
Related work
Commercial Desktop ERPWindows desktopRelease candidate
CMDS
Offline-first Windows desktop ERP for trading counters and branches — inventory, sales, purchasing, payments, expenses and reporting. Release Candidate v1.0.0.
- Offline-first Windows counter operations
- Sales, stock and treasury in one local record
- Role-gated discounts and adjustments
Technology: .NET 8 · WPF · SQL Server · EF Core
Gym Management PlatformWebDevelopment / pilot preparation
EH Gym ERP
Web gym and fitness management for memberships, subscriptions, attendance, trainers, classes, POS, finance and reports. Preparing for pilot use.
- Membership and subscription periods
- Attendance and class scheduling
- POS linked to member accounts
Technology: ASP.NET Core 8 · Next.js 15 · SQL Server · EF Core
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