AI Product Engineer building agentic workspaces, browser copilots, and AI-native productivity tools.
Email · Eragear · Portfolio · LinkedIn
I build AI-native software products that combine full-stack engineering, agentic workflows, and practical user experience.
My current focus is Eragear — an AI workspace ecosystem for long-running conversations, artifacts, browser-assisted research, local knowledge workflows, and agent integrations.
I care about:
- Designing AI products that are actually useful in daily workflows
- Building streaming chat systems, model routing, credit usage, and artifact experiences
- Creating agentic interfaces across web apps, browser extensions, local tools, and knowledge systems
- Shipping full-stack TypeScript products with Cloudflare, Hono, TanStack, Drizzle, Better Auth, and Bun
Eragear is an AI-native workspace for long-running conversations, in-context artifacts, research workflows, and agent-powered productivity.
| Area | What I Built |
|---|---|
| AI Workspace | Agent-first chat experience with selectable models, tools, search, and thinking controls |
| Streaming AI Backend | Hono-based AI API with model routing, streaming responses, usage tracking, and persistence |
| Artifacts | Sidecar workspace for AI-generated documents and rich content |
| Credits & Billing | Usage-based credit accounting and payment webhook architecture |
| Browser Copilot | Extension that bridges browsing context into the AI workspace |
| Knowledge Copilot | Obsidian assistant using deterministic graph-based context instead of only vector search |
| Code Copilot | ACP-based coding assistant connecting browser UI with local AI agents |
| Project | Description | Stack |
|---|---|---|
| Eragear Core | AI-native workspace with chat, artifacts, credits, billing, auth, and Cloudflare deployment | TanStack Start, React, Hono, Cloudflare Workers, D1, Drizzle, Better Auth, Bun |
| Eragear Web Extension | Browser copilot for human-in-the-loop research and verified web context collection | WXT, React, TypeScript, Tailwind CSS |
| Eragear Code Copilot | Web-based AI coding assistant using Agent Client Protocol to connect UI with local coding agents | React, Hono, tRPC, ACP, Zustand |
| Eragear Obsidian Copilot | Local-first Obsidian assistant using graph-based context retrieval | Obsidian API, TypeScript, Graphology, MiniSearch, Web Workers |
| AI Chatbot Tree | Branching conversation UI with conversation-tree SSOT and projection-based context control | Next.js, AI SDK, Zustand, D3, React Flow |
- Streaming AI chat interfaces
- Multi-model routing and provider abstraction
- Tool-enabled agents and selected tool control
- Long-context conversation handling
- Artifact generation and sidecar workspaces
- Usage tracking, credits, billing, and rate limits
- React / TanStack Start / Next.js
- Hono / Cloudflare Workers
- Drizzle ORM / Cloudflare D1 / SQLite
- Better Auth
- Bun / Turborepo / Biome
- Browser extension copilots
- Obsidian/local-first knowledge tools
- ACP/MCP integrations
- AI coding assistants
- Human-in-the-loop research flows
- Built a Cloudflare-native AI workspace architecture with separate web, server, auth, database, and AI packages.
- Implemented streaming chat flows with usage metadata, message persistence, and credit deduction.
- Designed an agent selection system with persisted model, tool, and thinking-budget state.
- Built browser-extension workflows that let users verify search results before sending context to AI.
- Explored deterministic knowledge retrieval using graph algorithms such as PageRank and spreading activation.
- Built conversation-tree UX experiments for branching, regenerating, and composing AI context.
I am currently focused on:
- Turning Eragear into a polished AI workspace product
- Improving agentic UX for research, coding, and knowledge work
- Building reliable AI infrastructure around streaming, billing, persistence, and tool use
- Creating public case studies from private product work
I am open to roles related to:
- AI Product Engineer
- Full-stack AI Engineer
- Agentic Workflow Engineer
- Frontend/Full-stack Engineer for AI products
Email: tongducthanhnam@gmail.com