GoBD Invoicing Backend Asset

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🔥 ENTERPRISE-GRADE MICRO-SAAS ASSET: Plug-and-Play B2B Invoicing Engine with Bulletproof GoBD ComplianceStop wasting 6+ months and tens of thousands of dollars developing complex, legally compliant billing backends. "meister-v2" is a 100% finished, rigorously tested, and production-ready B2B Invoicing SaaS Infrastructure built to absolute enterprise standards. Whether you want to launch a highly profitable micro-SaaS tomorrow, upgrade your existing platform, or sell it as a core component to European enterprise clients—this asset is your ultimate shortcut.🚀 WHY BUYERS AND INVESTORS LOVE THIS ASSET:1. Zero Legacy Debt – 100% Clean CodeBuilt using a strict Hexagonal Architecture (Ports & Adapters) in TypeScript and Next.js 14. The business logic is completely decoupled from databases and external APIs. Any senior developer can read, scale, and customize this codebase within minutes.2. Unbreakable German GoBD Compliance (§146 AO)This is the ultimate selling point for the European market. It features a cryptographically linked audit ledger (SHA-256 chain). By using atomic PostgreSQL transactions (insertInvoiceWithLedgerAtomic) combined with PostgreSQL Advisory Locks, data loss or manipulation is mathematically impossible—even during sudden server crashes. It is 100% audit-ready.3. Hardened Security & Multi-Tenancy (Scale-Ready)Native PostgreSQL Row-Level Security (RLS) ensures absolute data isolation between tenants. Authentication is locked down via asynchronous JWKS validation using the "jose" library (RS256/PS256). It’s secure against modern exploit vectors from day one.4. Precision Financial EngineNever deal with floating-point rounding errors again. Powered by "big.js", the calculation engine guarantees flawless accuracy for standard tax rates, custom discounts, and specialized regulations (such as German solar tax exemptions under §12 Abs. 3 UStG).📦 WHAT IS INCLUDED IN THIS SALE:- 100% Full Intellectual Property (IP) Transfer & Source Code Ownership.- Complete, production-ready GitHub repository with full commit history.- Production-hardened CI/CD workflows via GitHub Actions.- Comprehensive Automated Test Suite (Vitest integration tests) ensuring zero bugs.- Professional System Documentation (ARCHITECTURE.md).- Clean, decoupled UI dashboard—ready for your branding and logo.💡 THE INVESTMENT OPPORTUNITY:The technical foundation is completely done and verified. As a backend architecture purist, I built this to perfection but do not wish to run the marketing side. For an agency, a founder, or a strategic investor, this is a turnkey business. Hook up a payment gateway, acquire 3-5 business clients, and this asset will instantly generate thousands in Monthly Recurring Revenue (MRR), multiplying its current valuation.Serious inquiries only. Contact me directly to sign an NDA and get immediate access to the code audit and repository. Let's make a deal!