Anik Sikder
Architecture Knowledge Base

Architecture &System Design

Production-grade architecture blueprints, scalability strategies, security patterns, and engineering decisions used in modern SaaS, cloud-native, and distributed systems.

Multi-TenantRBACIAMCloudDistributed SystemsScalability
13
Production Blueprints
SaaS
Business Systems
Security
IAM & RBAC
Scale
Cloud & Distributed
Top Featured Blueprint

Scalable System Design

17 min readAug 2026

Applying clean architecture, service boundaries, and domain-driven principles to support long-term growth.

ArchitectureSystem DesignDDDClean ArchitectureScalability
Blueprint-Preview.md
01Clean Architecture
02Domain-Driven Design
03Service Layer Pattern
04Business Workflow Orchestration
05Maintainable Codebases

Production-grade architecture guide

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Blueprints

Architecture Library

Deep technical breakdowns covering SaaS, security, identity, cloud infrastructure, distributed systems, and large-scale backend design.

NexusFlow (Real-Time Communication, Contracts & Escrow Platform)

Enterprise-grade collaboration and transaction platform combining real-time communication, versioned digital agreements, milestone-based escrow, double-entry wallet accounting, dispute management, and event-driven transaction processing within a secure multi-tenant architecture.

01WebSocket-first real-time communication
02Versioned contract and acceptance model
03Double-entry escrow and wallet ledger
04Atomic milestone state transitions
05Transactional outbox for reliable events
06Idempotent payment and webhook processing
07Automatic dispute-driven fund freezing
08CQRS read models for conversations and transactions

BizNex OS (Unified Business Operating System)

Enterprise-grade business operating system designed to unify inventory, accounting, sales, procurement, billing, and organizational workflows within a secure multi-tenant SaaS architecture.

01Double-entry accounting core
02Ledger-based inventory engine
03Domain-bounded ERP modules
04Tenant-isolated financial records
05Event-ready modular monolith

Event Management & Ticketing System

Scalable event management platform supporting event lifecycle management, ticket sales, attendee registration, payment processing, and QR-based access control.

01Concurrency-safe ticket booking
02Booking-first reservation model
03Webhook-driven payment verification
04Event lifecycle state machine
05QR-based check-in validation