Toan Nhu
I'm a data engineer turned founder with nearly ten years of building backend and data systems, most recently in Web3 and AI agents. I started on Java microservices at Zalo, then spent six years on data platforms at Zalo and Tiki, one of Vietnam's largest e-commerce companies: a customer data platform, marketing attribution, an affiliate system and ads catalog feeds, mostly on Spark, ClickHouse and Google Cloud. As co-founder and data lead at Nimbus, I built a lakehouse for on-chain data, real-time investment analytics and a live pricing engine for tokens and NFTs. Today I run Mermail (mermail.app), an inbox and wallet for AI agents that they reach over MCP, and Nudgen (nudgen.net), AI-powered retention email for e-commerce stores. For the Tatum x Walrus Total Recall hackathon I built WalletTwin on Tatum's Sui gRPC, GraphQL and Data API. I've freelanced on Upwork since 2022 in Python, Go, TypeScript and Next.js. I'm a good fit for on-chain data pipelines, blockchain analytics, AI agent integrations and full-stack products that have to hold up in production. I've also mentored data engineering and full-stack web courses at FUNiX and CoderSchool.
- toanbk21096@gmail.com
- $45/hr
- 10 YOE of AI and Product Engineering
- Ho Chi Minh City, Vietnam
Skills
- TypeScript
- Next.js
- React
- Node.js
- Sui
- Walrus Memory
- Tatum API
- AI agents
- MCP servers
- Claude API
- PostgreSQL
Portfolio
- WalletTwin
WalletTwin turns a Sui wallet into a second brain you can talk to. It reads the wallet's full trading history through Tatum (Sui gRPC, GraphQL and the Data API for hourly USD prices), works out realized PnL, win rate and habits, and stores trades, milestones and a trading-style profile in Walrus Memory on mainnet. Owners chat with their twin; published twins can be chatted with and paper copy-traded by anyone, and every twin is also available to AI agents as a remote MCP server. Built for the Tatum x Walrus Total Recall hackathon. Code: https://github.com/Nudgen-Marketing/wallet-twin
- Mermail
Mermail gives AI agents their own email inbox and wallet so they can act in the real world without borrowing a person's identity. Each agent gets a dedicated address for sign-ups, verification codes, receipts and conversations, with scoped tools, approval gates before anything sends, and an optional Agent Wallet for controlled payments. Everything is reachable through an API and a single MCP connection, so it works with Claude, ChatGPT, Cursor or a custom agent. I founded it in 2026 and build it end to end, from the mail infrastructure to the agent tooling.
On-Chain StorageWalrus provenance
Self-service profile. EVM controller; blob stored via Tatum. Only this address can publish updates.
- EVM address
- 0xe943ca6f83e4585fb64c2118d36ac325e1bf149e
- Content hash
- db77f9c81217050319a171f4215c32b51e20f87f0d30c1938e96db36fb393b81
- Blob ID
- qf0cj_e9MoMkcS3mAO8AaL3S5MbepHNHeoQ04fiMun8