Blair Xu

Projects

Nodebase — Visual Workflow Automation Platform

Built a production-ready SaaS workflow automation platform with a visual drag-and-drop editor, background job execution, AI integrations, and subscription billing.

• Visual workflow builder using React Flow
• Webhook, Stripe & manual trigger nodes
• AI integrations (OpenAI, Claude, Gemini)
• Background job execution with Inngest
• Authentication, subscriptions & paywalls
• Error monitoring with Sentry
• Background job retries + failure handling

Stack: Next.js 15, React, TypeScript, tRPC, Prisma, Neon Postgres, Polar, Better Auth

Live GitHub

Funroad — Multi-Tenant E-Commerce Marketplace

Developed a multi-tenant marketplace where creators operate independent storefronts and receive payouts through Stripe Connect.

• Multi-tenant architecture with vendor subdomains
• Stripe Connect with automatic platform fees
• Merchant & admin dashboards with RBAC
• Product filtering, search & review system
• User purchase library & digital file delivery
• Tenant isolation enforced at routing + data layer

Stack: Next.js 15, Payload CMS, Stripe Connect, MongoDB, TailwindCSS, ShadcnUI

Live GitHub

Real-Time Sports Broadcast Engine

Engineered a real-time broadcast system delivering live match scores and commentary updates with sub-second latency using WebSockets.

• WebSocket server with pub/sub match rooms
• REST API for match & commentary ingestion
• Secure connection handling & rate limiting
• Scalable broadcast architecture for high concurrency
• Deployed with monitoring & performance tracking
• Reconnect handling + room-based fanout broadcasts

Stack: Node.js, Express, WebSockets, REST APIs, Arcjet, APM Monitoring

Live GitHub