Tobias / Guanyi Du · Software engineering
I build across Rust and Go systems, AI products, and blockchain infrastructure — connecting the engineering underneath with the experience people actually use.
Head of Software Engineering at InfinityTech.
Based in Poland. Working across languages and teams.
Systems · Products · Applied AI
Rust · Virtual machines · Zcash
A reusable execution layer for Zcash applications.
I built a microchain runtime that separates application logic from sequencing, checkpoints, settlement and recovery. Deterministic state transitions, Merkle commitments and signed intents give different applications the same execution foundation.
Conformance checks cover replay, serialization and value conservation. The workspace also includes swap, wallet and marketplace applications.
Go · Rust · Solidity
An exchange and the execution system beneath it.
My contribution to Levu spans a perpetual-futures exchange whose leverage limits follow measured liquidity, with oracle aggregation, margin allocation and a paper-trading interface. Roda supplies a deterministic Rust VM and a Go sequencer for each market.
The execution layer includes checkpoint data availability and Solidity withdrawal verification. Roda is a development implementation; public-chain validity proofs are not yet deployed.
TypeScript · Next.js · PostgreSQL
A living simulation, from field observation to shared world.
I built a fungal simulation product across a public website, game, mobile field-observation app and shared platform. The backend owns simulation outcomes, APIs, checkout settlement and data migrations.
Private field records, review workflows and a deterministic simulation engine connect the product. Each application has a separate responsibility and repository.
WebMCP · Browser extension · AI tooling
Video research that people and agents can work on together.
I built a shared workspace that turns video research into timestamped evidence and editable reports. Its 37 semantic WebMCP tools let an agent operate the same brief, sources and canvas that a person can inspect and revise.
A browser adapter combines caption retrieval and optional real-time transcription, keeping the research evidence synchronized with the visible workspace.
Infrastructure, tools & everyday applications
Intent-based exchange
I lead this 0x01 marketplace project, with a typed SDK, API and bilateral EVM settlement. Scoped agent mandates, replay protection and EIP-712 signatures keep asset owners in control of acceptance and settlement.
TypeScript · Hono · Solidity
Bonded oracle agents
Oracle infrastructure with signed attestations, dispute handling and a reference Warsaw real-estate feed. Protocol contracts, a runtime-agnostic agent SDK and a frontend are maintained as separate components.
Solidity · TypeScript · Next.js
Portable personal agents
A personal-agent layer with approved memory, OAuth-authenticated MCP tools and durable task orchestration across model clients. Seven Solana programs cover reserves, bounded spending, attestations, governance records and escrow.
MCP · PostgreSQL · Solana
Parent-guided learning
An adaptive education product with parent-approved feedback, separate parent and study mobile apps, household records and an academy evidence ledger. The parent retains the final educational judgment.
TypeScript · Mobile · PostgreSQL
Answer-engine intelligence
An extension of the open-source Elmo platform for Web3 teams: answer-engine tracking, citation diagnostics, audits and before/after measurement of changes made from the findings.
TypeScript · PostgreSQL · AI tooling
Private, on-device decision support
A SwiftUI app for comparing options, using private on-device AI suggestions and collaborating with nearby friends. MLX inference and SQLite storage keep the core experience local.
SwiftUI · MLX · SQLite
Community startup funding
A community launch project using Compact contracts, private participation and milestone-funding workflows. It helps builders move from an idea and early support toward accountable delivery.
TypeScript · Compact · Midnight
A family circle of support
I contributed to an elder-support product that brings its Polish landing page and family dashboard together. The prototype helps a family organize contact, requests and shared responsibilities around an older relative.
TypeScript · Family dashboard
An NFT-linked launchpad
My contribution includes a launchpad with Solidity escrow, Uniswap v4 hooks, fee accounting and time-bound NFT custody. The current launchpad contracts are a development implementation.
Solidity · Uniswap v4 · TypeScript
From customer signals to follow-up
A Convex-based agent that monitors customer signals, investigates changes with source evidence, prioritizes issues and follows up through email. A reactive dashboard makes the investigation visible.
Convex · OpenAI · AgentMail
An intelligence desk with memory
A project-intelligence desk combining persistent Sibyl memory, evidence-backed verdicts and x402 report payments. Conclusions remain linked to the evidence and earlier investigations behind them.
Convex · Python · Sibyl · x402
Treasury activity, made legible
A Solana monitoring agent that classifies treasury and team-wallet flows, creates evidence cards and assembles periodic digests. Part of my work under the 0x01 umbrella.
TypeScript · Solana · Monitoring
About & experience
I’m Tobias Du, also known as Guanyi. My work combines hands-on software engineering with technical project delivery and client communication.
I currently lead software development projects at InfinityTech and coordinate with Chinese clients. Earlier work in Android telecom and localisation QA shaped how I test systems, investigate failures and communicate what needs to change.
I studied Mechatronics / Automotive Engineering at Warsaw University of Technology.
Mandarin · Native
English · Professional C1
Polish · Conversational A2
Working with
TypeScript, Rust, Python, Go, Solidity, Swift
React / Next.js, PostgreSQL, Convex, MCP / WebMCP, smart contracts and mobile applications.