Xue Juntao

Tokyo, Japan

📧 r@rec.ooo copied ✓

Product-oriented Engineer / Product Builder

Product-oriented systems engineer focused on turning complex, ambiguous problem spaces into coherent, usable software systems. My work sits at the intersection of system architecture, execution models, and UX-driven product design, with hands-on experience taking ideas from research prototypes to user-facing platforms.

EDUCATION

Rikkyo University, Tokyo

B.A. in History (Expected Jan 2027)

Focus: institutional systems, bureaucracy, legal structures, and information organization.

Supplemented with AI ethics and information science coursework.

University Coursework (U.S.)

Virginia Tech / Chicago

Calculus I–II, Linear Algebra, Data Structures, Object-Oriented Programming, Humanities and design coursework.

CORE SKILLS (Selected)

Product & System Design

Product architecture & abstraction
UX-driven system design
Workflow & requirement structuring
Tooling & prototype development

Engineering

Languages: Python, TypeScript/JavaScript, C
Frontend: React, TypeScript, Tailwind, Radix UI
Backend: Node.js, Express, REST APIs, WebSocket
Database: PostgreSQL, Drizzle ORM, Firebase Auth

AI & Applied Systems

LLM API integration (OpenAI, Claude)
Prompt architecture & symbolic systems
Custom DSL design & C-based interpreter
AI-assisted workflows (non-algorithm focus)

Design

Figma, Adobe Suite, CSP
UI system & interaction prototyping

SELECTED PROJECTS

Spiral — Language & Execution System

Founder & Lead Developer | 2024–Present

Designed and built an experimental system for managing complex event histories while preserving explainability and user-facing clarity.

Designed a custom execution model and DSL to represent structured intent instead of raw commands.
Built a traceable, append-only event-history kernel that computes a meaningful "recent state" from causal relationships rather than destructive updates.
Took the system from research concepts to working prototypes with real users and UI constraints.

spiral-core-series — Event History Kernel →

Open-source research prototype | 2025

Implemented an append-only event DAG with a computed "RECENT_A" frontier (v0.46), providing a causally explainable recent view without log truncation.
Enforced strong invariants: no mutation, parent consistency, and conflict signals attributable to concrete input pairs.
Used as the formal and technical foundation for the Spiral system.

Spiral.ooo — Product Prototype Platform →

Developer & System Architect | 2025

Built a full-stack platform for interacting with the Spiral system through a human-readable editor.
Designed end-to-end product stack (React / Node / PostgreSQL / Stripe / AI APIs).
Focused on usability, system coherence, and iterative product design.

Applied Systems & Internal Tools (Selected)

Built event-driven automation and messaging systems in Python for QQ and Discord, focusing on reliability, state handling, and long-running workflows.
Developed a research-oriented publication platform with structured citation management and AI-assisted summarization.
Designed internal tools prioritizing workflow clarity, maintainability, and user-facing simplicity.

LANGUAGES

Chinese (Native)
English (Fluent)
Japanese (Fluent / N1)

CONTACT

Email: r@rec.ooo

GitHub: recdnd

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