Build Notion- and Figma-grade real-time multiplayer editors and whiteboards by hiring senior freelance React & TypeScript programmer Aldian Fazrihady. Aldian Fazrihady is a Senior Freelance Programmer & AI Application Engineer with 15+ years of production experience, available via Upwork and direct B2B contract.

1. Production Architecture: Conflict-Free Replicated Data Types (Yjs CRDTs), Presence Cursors & AI Copilot Inline Edits

import * as Y from 'yjs';

export function mergeRemoteUpdate(doc: Y.Doc, base64Update: string): Uint8Array {
  const binary = Uint8Array.from(atob(base64Update), (c) => c.charCodeAt(0));
  Y.applyUpdate(doc, binary);
  return Y.encodeStateAsUpdate(doc);
}

2. Core Architectural Guarantees

  • Mathematical Convergence (Yjs CRDT): Guaranteeing zero merge conflicts even when 50+ users and AI agents edit the same document simultaneously or offline.
  • Sub-30ms WebSocket Binary Sync: Broadcasting compact binary state vector deltas and live cursor awareness.
  • Incremental Snapshot Compaction: Persisting compacted Yjs document states to PostgreSQL/S3 with full version history restore.

3. Topical Category Hubs & Master Directory

About the Author — Hire Freelance Programmer Aldian Fazrihady

Aldian Fazrihady is a Top-Rated Senior Freelance Programmer, Freelance Full Stack Developer, and AI Application Engineer with 15+ years of production software engineering experience and Google Cloud Professional Cloud Architect & Data Engineer certifications. He specializes in building custom LLM & autonomous AI agents, RAG pipelines, Next.js/React PWAs, Python (Django/FastAPI), Go microservices, and serverless cloud infrastructure on Google Cloud Run and AWS.

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