Engineer & operator · Kuala Lumpur

Systems that outlast
the people who built them.

I’m Tan Ji Sheng. I build AI and blockchain systems. Two of them I have handed on, a public chain and a game studio. The third, a digital-asset custodian, is being built so that it can be.

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CEO, GamBit Custody, on a fractional mandate. Available for independent advisory and architecture work.

Thirteen years of shipping.
The last eight on-chain.

  1. 2018 to 2021 · Trivechain

    Ran a live public chain, then built its migration when the network wound down.

  2. 2021 to 2025 · Playermon

    Developer, then CEO of a studio of more than 60 people, handed over in 2025.

  3. 2026 · GamBit Custody

    Leading a custodian whose controls run on process, not presence.

Read the full experience

Selected work

Built, shipped, and open to scrutiny.

Three chapters in making complex systems work.
Roles, decisions, artifacts, and what I learned.

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CITY DATA CONNECTED CITY Two buses. Continuous information.
Applied data systemsHexon Data

Making city data useful on the ground.

Live bus positions and arrival estimates for the PJ City Bus app, and fleet analytics used by two local governments.

01Protocol layer02Network layer03Consensus layer04Data layer05Application layer Trivechain · The stack, layer by layer Conceptual architecture
Protocol engineeringTrivechain

Building beneath the application layer.

Mining pool, explorer and wallet for a live Layer-1, a proof-of-work hard fork, and the migration to BNB Chain when the network wound down.

Playermon · Ownership on-chain Razortooth #0421 Asset ID · unchanged PYM #0421 Owner0xA1…7CWallet A0xB2…9FWallet BAB Ownership recorded Same asset. New owner.
Product & AI deliveryPlayermon / Razortooth AI

From a game world to a community agent.

Developer to CEO of a studio that reached more than 60 people, shipping a marketplace, game titles and a Telegram community agent.

Where I can help

The system.
The decisions.
The people after you.

Read all three areas

AI systems

From data and community agents to workflows people can inspect and operate.

Blockchain architecture

Protocol decisions, ownership models, and the operational work behind the chain.

Custody & succession

How digital assets survive changes in people, systems, and generations.

Inside the Lab

Learn machine learning, from a decision tree to a mixture of experts.

A course you take in your browser, one session at a time, each ending with a check you pass by doing it. Alongside it, blockchain lessons on hashes, blocks, wallets and signatures, and everyday tools that stay free, ad-free and tracker-free.

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Tan Ji Sheng

A person behind the systems

Engineering is also an act of stewardship.

I lead GamBit Custody and advise teams independently. My current focus is making digital-asset control understandable, operable, and ready for a handover.

Current focusAbout Ji ShengSpeaking

GamBit Custody is regulated by Securities Commission Malaysia.

Ideas with a history

Follow the thinking.

Now · Updated September 2026

Building for the next handover

How intelligent systems remain accountable, and how digital assets survive changes in people, systems, and generations.

Blockchain · Archive, 2020

Understanding DAOs

Governance, a treasury, and the decisions behind a real implementation.

Have a system worth thinking through?

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