Salync
A production-grade, multi-tenant B2B SaaS platform covering the complete operational lifecycle for distribution companies — sales, procurement, inventory, payroll, and double-entry financial accounting.
Executive Summary
What Salync is
Salync is a multi-tenant SaaS platform built specifically for distribution companies — businesses that buy goods from suppliers and sell to customers across multiple locations and sales teams. It replaces the patchwork of spreadsheets, standalone accounting tools, and manual processes that most SME distributors rely on.
The platform covers every core operational workflow: sales invoice creation, purchase order management, real-time inventory tracking across warehouse locations, complete double-entry financial accounting, payroll management, and performance reporting. Field salesmen access the platform via a cross-platform mobile app with GPS tracking and offline-capable order creation.
Unlike generic ERP systems that require months of configuration consulting, Salync is purpose-built for distribution. The data model, workflows, and reporting reflect how distribution companies actually operate — not how a generic enterprise system thinks they should.
Business Challenge
The problem distribution companies face
Distribution companies operating at scale face a common set of operational challenges: inventory scattered across multiple locations with no real-time visibility, sales teams creating invoices manually or in offline spreadsheets, accounting that lags days behind operations, and management reporting that requires manual consolidation.
Generic ERP systems exist, but they are designed for manufacturing or retail — not distribution. They require expensive implementation projects, don't fit distribution-specific workflows like location-scoped sales policies or salesman target tracking, and impose licensing costs that make per-location scaling prohibitive for SME distributors.
Field sales teams working from mobile devices compound the problem. Salesmen need to see stock availability, create orders, and collect payments in real time — without waiting for a desktop connection or a back-office team to process their paperwork.
Core Features
Platform capabilities
Sales Management
Complete sales lifecycle — invoices, orders, returns, exchanges, customer claims, and salesman performance targets.
- Sale invoices with line items, discounts, and withholding tax
- Sale returns and product exchanges
- Customer claims management
- Salesman target tracking and performance analysis
Procurement
End-to-end supplier management with purchase invoices, returns, and supplier claims.
- Purchase invoice creation and approval workflow
- Purchase returns tracking
- Supplier claims and dispute management
- Comprehensive party (customer/supplier) profiles
Inventory Management
Real-time stock tracking across multiple locations with brand and category hierarchies.
- Real-time inventory tracking with movement history
- Multi-location stock visibility
- Brand → Category → Item hierarchical organization
- Stock write-offs and adjustments
- UOM (Unit of Measure) conversions
Financial Accounting
Full double-entry bookkeeping with general ledger, journal entries, and financial reporting.
- Chart of accounts with GL structure
- Double-entry journal entries (Dr=Cr enforced)
- Multi-party vouchers for payments and receipts
- Cost center allocation
- Fiscal year management with open/close states
- Party sub-ledger for AR/AP tracking
Payroll Management
Employee salary cycle management with configurable components and contract tracking.
- Payroll run processing per period
- Variable and fixed salary components
- Employee contract management
- Expense request and approval workflow
Reporting & Analytics
Comprehensive reporting suite covering sales, finance, and operational performance.
- Daily Sales Report (DSR)
- Cash receipts and day book
- Profit & Loss statement
- Inventory status and movement history
- Party ledger statements
- Party balance aging
- PDF and Excel export
Multi-Tenant Platform
Softify-operated SaaS management layer for tenant provisioning and subscription management.
- Tenant onboarding and provisioning
- Subscription tier management
- Automated company, location, and user setup
- Cross-tenant platform administration
Mobile Field App
Cross-platform mobile application for field sales teams with offline-capable design.
- Sale order and invoice creation on mobile
- Real-time GPS location tracking
- Push notification delivery
- PKCE-secured OAuth 2.0 authentication
- Encrypted token storage via Expo Secure Store
- OTA updates without app store review
Architecture
Platform architecture overview
Salync follows a Clean Architecture approach across three separately deployed services, with a shared domain library and a dedicated multi-tenant data layer.
Frontend Layer
React 18 SPA with multi-portal design. Single build artifact serves the employee portal (tenant subdomain), admin portal, and platform admin — differentiated by route and hostname.
Mobile Layer
React Native via Expo managed workflow. Cross-platform iOS and Android app with PKCE authentication, GPS tracking, push notifications, and encrypted offline token storage.
Authentication (STS)
Duende IdentityServer 7 on a dedicated service. Issues JWT access tokens with embedded tenant_id, location_id, employee_role, and scope claims. Separate OIDC clients for web, mobile, and platform.
Business API
ASP.NET Core 8 with Clean Architecture and CQRS via MediatR. 68 controllers, scope-based authorization, global multi-tenancy query filters, rate limiting, and response compression.
Platform API
Dedicated API for SaaS platform operations — tenant provisioning, subscription management, and cross-tenant administration. Separate from the business API for security isolation.
Data Layer
Three separate SQL Server databases: SalyncSTS (identity), SalyncPlatform (provisioning), and SalyncOperations (all business data). EF Core with global query filters for tenancy.
Technology
Technology stack
frontend
mobile
backend
infrastructure
integrations
Screenshots
Platform in action
Sales Dashboard
Mobile App — Sales
Inventory Management
Financial Reports
Mobile App — Orders
Analytics Dashboard
Engineering
Engineering highlights
Architectural and engineering decisions that make Salync production-grade, secure, and maintainable at scale.
Multi-Tenancy via Global Query Filters
Every entity in the ORM has a global query filter applying WHERE TenantId = @currentTenant AND IsDeleted = 0. Tenancy cannot be bypassed — it is enforced at the infrastructure layer, not per-query.
JWT-Embedded Tenant Context
TenantId, LocationId, EmployeeRole, and Scope are embedded directly in the JWT access token. No database lookup is required to determine who a user is or what they can access — authorization decisions are instantaneous.
Immutable Financial Records
Posted journal entries and stock movements are never modified. Corrections create reversal entries, preserving a complete, tamper-proof audit trail that satisfies accounting compliance requirements.
Three-Database Separation
Identity, platform provisioning, and business data are in three separate databases. This provides independent scaling, backup/restore per tenant, and clear security boundaries between SaaS infrastructure and customer data.
Double-Entry Bookkeeping Enforcement
Every financial transaction creates balanced journal entries (Debits = Credits). The platform sub-ledger derives AR/AP balances directly from journal lines, ensuring financial statements always balance.
Location-Scoped Visibility
An X-LocationId header enables location-level data isolation. Salesmen see only their location's data. Owners and managers can toggle across locations. The same codebase serves both use cases.
Purpose-Aware Rate Limiting
Three distinct rate limit tiers: 300 req/min globally per user, 6/min for GPS pings (tuned for 30-second mobile cadence), and 10/min for export operations that are CPU-intensive.
Mobile PKCE Authentication
The mobile app uses PKCE flow — no client secrets stored in the app binary. Tokens are stored in Expo Secure Store (encrypted at rest). Deep linking handles the OAuth callback without restarting the app.
Impact
Business outcomes
Real-time operational visibility
Owners and managers see live sales, inventory, and financial data across all locations — without waiting for end-of-day reports.
Faster sales cycle
Field salesmen create invoices and collect payments on mobile, reducing the time between order and processing from hours to minutes.
Accurate financial accounting
Double-entry bookkeeping enforced at the platform level eliminates manual reconciliation errors and ensures books close accurately.
Scalable multi-location operations
Adding a new location requires configuration, not engineering. Location-scoped data isolation keeps operations clean as the company grows.
Compliance-ready audit trail
Soft deletes, immutable financial records, and comprehensive logging provide the audit trail required for regulatory and tax compliance.
Reduced operational overhead
Automating payroll processing, inventory adjustments, and financial reporting reduces the manual workload on back-office teams significantly.
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