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B2B OTA Platform
A comprehensive B2B Online Travel Agency platform serving travel agents and corporate clients with real-time inventory, dynamic pricing, and booking management.
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Corridraw — Collaborative Diagram SaaS
A browser-based SaaS for real-time collaborative diagramming — flowcharts, system architectures, BPMN, and mind maps — with live multi-cursor editing, version history, and team workspaces.
Overview
Corridraw is a live SaaS diagramming tool (corridraw.com) for collaborative flowcharts, architecture diagrams, BPMN, ER, and mind maps — featuring multi-cursor real-time editing, a virtualised SVG/Canvas editor, and CRDT-backed concurrency.
Key Features
- Real-time multi-cursor collaboration powered by a CRDT document model over WebSocket
- Custom SVG/Canvas hybrid editor on React with virtualised rendering for diagrams with thousands of shapes
- Orthogonal auto-routing engine with snap-to-grid and smart guides for clean, jitter-free connectors
- Modular shape libraries loaded on demand (AWS, UML, network topology, floor plans, BPMN)
- Append-only operations log driving version history and deterministic exports
- Workspace-level RBAC with JWT sessions and email verification via a dedicated NestJS auth service
- Background export pipeline for PNG/SVG/PDF plus thumbnails and usage analytics roll-ups
Architecture
| Component | Details |
|---|---|
| Editor | Custom SVG/Canvas hybrid on React with virtualised rendering, orthogonal auto-routing, snap-to-grid, and smart guides |
| Shape libraries | Modular, on-demand packs for AWS, UML, network topology, floor plans, and BPMN |
| Collaboration gateway | Node.js WebSocket service carrying a CRDT document model so concurrent edits merge cleanly without locking |
| Auth service | Dedicated NestJS service handling JWT sessions, email verification, and workspace-level RBAC |
| SSR app | Next.js SSR front-end serving corridraw.com, hydrating the editor, and brokering REST calls |
| Database | PostgreSQL storing documents, workspaces, and an append-only operations log for history and exports |
| Background workers | Queue-driven workers for thumbnail generation, scheduled PNG/SVG/PDF exports, and analytics roll-ups |
| Infrastructure | Single VPS with separate processes for SSR app, auth service, and WebSocket gateway behind nginx with TLS termination |
Tech Stack
Next.jsReactNode.jsNestJSWebSocketCRDTPostgreSQLRedis
Details
Category Web
Technologies 8
Status Published
Featured Yes
Gallery
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