Enterprise Collaboration, Unified.
Nexus is a comprehensive workspace built on Next.js 14. What started as an exploration into real-time systems evolved into an enterprise-grade platform featuring HD video meetings, context-aware AI assistants, universal semantic search, and zero-trust security using Stream, Clerk, and Google Gemini.
The Vision
In an era of remote work, seamless collaboration is non-negotiable. Yet, many conferencing platforms feel bloated, resource-heavy, and disconnected from the asynchronous tools we use daily. I built Nexus to challenge this standard.
Nexus is a unified communication layer. The vision was to tightly couple real-time, low-latency HD video with persistent, threaded text chat—all within a lightning-fast web interface built on the Next.js 14 App Router that feels native and responsive.
Engineering the Engine
Building a synchronous real-time app forces you to confront the realities of network latency, browser resource limits, and state synchronization.
Global Edge Infrastructure
Instead of managing low-level WebRTC SFUs from scratch, I leveraged the Stream Video and Chat SDKs. This offloaded the heavy lifting of global media routing, allowing the platform to deliver crystal-clear 1080p video and spatial audio with sub-50ms latency across regions.
Zero-Trust Architecture
Enterprise tools demand strict access control. By integrating Clerk and a server-brokered approach for Firebase Storage using the Admin SDK, all files are requested via temporary signed URLs with 5-minute TTLs. Tests demonstrate that updating or deleting memberships cuts off storage access with an propagation latency of ~1.1s.
Multiplayer CRDT Canvas
We integrated Yjs CRDTs and Liveblocks to drive real-time multiplayer states. Whether typing rich text or drawing whiteboard components, user actions merge conflict-free locally before syncing, guaranteeing high performance even offline.
Universal Semantic Search
We built a dual-engine workspace-isolated search. Document embeddings are generated via gemini-embedding-001. If our external Pinecone index is disabled, the server executes an in-memory cosine similarity fallback across all documents in just 0.36 ms (mean), synthesized by gemini-2.5-flash.
Context-Aware AI
Powered by the Vercel AI SDK and gpt-4o-mini, Nexus includes a floating context assistant that reads your active canvas to summarize or analyze data. It also aggregates the past 24 hours of workspace activity into a daily cached brief to keep the whole team aligned.
Phase 5 Parity Features
Designed for scale, the architecture outlines one-to-many Webinars with registration workflows, dynamic Breakout Rooms for splitting calls, and persistent Voice Channels for drop-in drop-out audio cooperation.
Telemetry Observability Registry
Latency distribution suite logs evaluated locally over concurrent loads.
LLM Synthesis (Gemini 2.5 Flash)
Streams natural language response synthesis using matched document context.
Firestore Read (Search Retrieval)
Reads raw matched documents dynamically from isolated workspace collections.
End-to-End Permission API RTT
Total round-trip time for permission query requests, including Clerk token validation.
Revocation Propagation Delay
Time delay before Firestore/Clerk token updates block signed URL access.
Daily Activity Brief Caching
Aggregates past 24-hour log actions, updates briefs cache in Firestore.
Workspace Creation Latency
Initializes brand new workspace parameters, database structures, and default channels.
Gemini Embedding Generation
API call to gemini-embedding-001 mapping canvas texts to 768-dimensional vectors.
RBAC Security Checks (PermissionService.can)
Evaluates role permission mappings for active workspace users dynamically from Firestore.
End-to-End Signed URL Fetch RTT
Total client round-trip time fetching temporary signed storage read credentials.
Signed Upload URL Generation (API)
Generates Admin-SDK signed storage URLs for zero-trust upload isolation.
In-Memory Cosine Similarity Match
Calculates similarity matching indices in-memory on Next.js Edge worker instances.