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Wenxi (Vincent) Jiao

AI / ML Engineer · Agentic Systems · Python Backends
[email protected]+64 22 516 7092 vincent.yumi.nexusgithub.com/wenxijiao yumi.nexusAuckland, NZ · open to NZ roles
Profile

I build agents that plan, call tools, act and verify, then carry them through backend infrastructure and product interfaces until real people can use them. Sole builder and operator of Yumi, plus four shipped products across mobile, web and community operations.

01Flagship

Yumi

Agent platform · sole developer & operator2025–now

A complete system for turning plain-language intent into verified action across apps and devices. I designed, built, deployed and operate every layer.

  • Engineyumi-agent: open-source planning and tool-calling loop with confirmation gates, a custom WebSocket edge protocol and SDKs in 11 languages.
  • PlatformYumi Enterprise: multi-tenant accounts, entitlements, quotas, billing, encrypted user data and audit infrastructure using Python, PostgreSQL and Docker.
  • EcosystemYumi Nexus + unified identity: one account across Telegram, Discord, mobile apps and a 3D web room; self-hosted with Docker Compose and Caddy/TLS.
Apache-2.0 core · Multi-tenant SaaS · Unified authentication · Live production deployment
02Shipped software

Temi

2025–2026

Tasks, habits and mood driven by Yumi. Chat becomes live app state through agent tool calls and Firestore streams; includes a seven-level mood diary.

Flutter · Firebase · iOS / Android / macOS / web

Memori

2025–2026

AI vocabulary cards across 10 languages with a custom forgetting-curve scheduler, softmax urgency and no “due” pile.

Flutter · Cloud Functions · adaptive scheduling

SaKi

2025

App Store AR walking game: records a real path, filters device poses, then judges the return walk inside a 20 cm corridor.

SwiftUI · ARKit · haptics · spatial audio

Meetup Seater

2025–now

Runs weekly check-in and history-aware seating for ~30 people, balancing languages while minimising repeat pairings.

Streamlit · Firestore · live phone views
03Research foundations

CiteSeek

Master’s thesis
2025–2026

An agentic citation-support system that searches scholarly databases, follows citation graphs, ranks candidate papers and verifies passage-level evidence. Citation snowballing raised benchmark retrieval from 11/28 to 28/28 claims, with R@5 0.91 · MRR 0.84.

Python · agentic RAG · scholarly APIs · embeddings · MCP server

Ship RL

BEng thesis
2023

Built a 4-DOF MMG simulator parameterised from a real 111 m container ship, then trained a Soft Actor-Critic policy with COLREGs-shaped rewards. Reached 95% collision avoidance after ~4,000 episodes, versus 12–27% for a sparse-reward baseline.

PyTorch · SAC / TD3 · MATLAB · pygame · physics simulation