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Hi, I'm Yi Wang

AI Agent Engineer · Full-Stack Developer — CS @ York University · Toronto, Canada

Portfolio LinkedIn CCA-F Adventure X 2026


👋 About Me

I turn AI agents from demos into production-grade systems — my favorite part is the unglamorous engineering that makes them reliable, observable, and affordable.

What I'm good at

  • Agent orchestration — LangGraph state machines, typed tool contracts, bounded workflows that turn free-form agents into controllable pipelines
  • LLM reliability — dual-layer guardrails (cut non-compliant output ~15% → <2% in production), fail-closed integrity gates, rule-engine-verified numbers, full audit trails
  • Cost & performance — input-hash caching (60–70% hit rate, <50 ms), agent regression evals (~10% fix-pass lift, token cost ~2M → ~70k per task)
  • 0→1 delivery — SwiftUI / Next.js / FastAPI / Spring Boot with CI/CD and monitoring; taking products from concept to production, solo or in small teams

What I'm into — agentic product systems · applied LLM infrastructure · AI + full-stack delivery · developer knowledge platforms


🏅 Highlights


🚀 Featured Projects

Core Products

1) SREDSimplify

SREDSimplify live preview

SR&ED claim console with evidence ingestion, structured pre-checks, and audit-friendly T661 drafting workflow for founders and reviewers.

Website

2) Ai DIY Docs

Ai DIY docs live preview

Engineering knowledge base covering CS core, AI agents, backend/frontend, and DevOps — built as a production-ready documentation platform.

Website GitHub Repository

3) Openbot

Self-hosted GitHub maintenance bot — issue triage, bug reproduction, auto-fix, code review, Q&A. Bounded workflows + regression eval: ~10% fix pass improvement, token cost ~2M → ~70k per task.

GitHub Repository

Hackathon Products

🏆 Possibility — Adventure X 2026 Track 1st Prize

Possibility live preview

AI decision companion for young professionals navigating career transitions. A 3-stage funnel: streaming AI chat surfaces emotional context & decision signals → structured matching with 3 real human experiences across different outcomes with rationale → paid conversion. Built solo in 6 days (189 commits) from concept to shipped product.

Website 🏆 GitHub Repository

🥈 SplitBase — NTU x Base Web3 Hackathon 2nd Place

SplitBase live preview

Base Pay bill-splitting app for group settlements with USDC, real-time status tracking, share links/QR flows, and optional NFT receipts.

Website GitHub Repository

SmartDiet Copilot

SmartDiet Copilot live preview

Agentic AI dietitian that combines receipt/fridge/meal perception with goal-aware planning to reduce waste and deliver actionable meal decisions.

Website GitHub Repository

FitLogic

FitLogic live preview

AI fitness coaching experience focused on adaptive training + nutrition logic, progress analytics, and coach-assisted personalization.

Website


🛠 Tech Stack

Agent / LLM LangGraph · LangChain · RAG · MCP · Structured Output & Guardrails · Agent Eval & Cost Control
Languages Python · TypeScript / JavaScript · Java · Swift · SQL
Backend & Frontend FastAPI · Spring Boot · Next.js / React · SwiftUI · PostgreSQL / pgvector · Redis · Celery
DevOps / Cloud Docker · GitHub Actions · AWS · Vercel · Linux

📊 GitHub Stats

GitHub Stats Top Languages


Turning AI agents into production systems with measurable outcomes.

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