KEVIN YIN

Full-stack developer — AI systems & interfaces.
Builder of RiftElo, live ratings for League of Legends' TCG.

STATUS: OPEN TO NEW OPPORTUNITIES

// the grid responds — move, click

SCROLL
02

Selected Work

LIVE — SELF-UPDATING

RiftElo

Riftbound is League of Legends' trading card game. RiftElo ingests its organized-play results, replays every match through a Glicko-2 rating engine, and publishes live regional rankings — fully automated, syncing every three hours with zero manual steps.

  • 0RATED MATCHES
  • 0PLAYERS
  • 0EVENTS
  • 0STORES

NEXT.JS / TYPESCRIPT / CLOUDFLARE WORKERS / NEON POSTGRES / PRISMA / GLICKO-2

ENTER THE LADDER
IN DEVELOPMENT

AI-Orchestrated
MMORPG

An experiment in how far agentic development can go: a multi-agent pipeline steering AI agents across the IDE and the Unreal Engine 5 editor to build an MMORPG with minimal hand-written code. Powered by two custom MCP servers — editor tooling exposing hundreds of actions, and a project wiki that keeps agent token usage lean.

UNREAL ENGINE 5 / MCP / MULTI-AGENT PIPELINES / TYPESCRIPT

SHIPPED — NEWTECH

AI Vehicle
Marketplace

Natural-language vehicle search, buying and trading across a live dealer-network inventory. Ask for "a reliable AWD family SUV under $25k" and get purchasable answers — not twelve dropdowns.

LLM INTEGRATION / VECTOR SEARCH / LARAVEL / VUE.JS

03

Experience

  • Co-led the company-wide Generative AI initiative — deployed MCP servers, built reusable skill modules, and stood up vector-database infrastructure powering AI retrieval and agentic workflows across the organization.
  • Architected an AI-powered automotive marketplace with natural-language search, buying, and trading across the full dealer-network inventory.
  • Built an end-to-end ecommerce platform for events & catering — Square payments, CRM sync, automated contracts, recipe forecasting — saving ~400 hours per coordinator per year.
  • Designed a multi-tenant SaaS website builder for dealerships: auto-provisioned hosting, live inventory, Carfax integration, prebuilt lead generation.

LARAVEL / VUE.JS / MYSQL / MCP SERVERS / VECTOR DBS / LLM INTEGRATION

  • Design adversarial coding evaluations and closed-repository challenges that surface failure modes in frontier LLMs' code generation and reasoning.
  • Run controlled head-to-head model comparisons, empirically validating generated code against live repositories under structured rubrics.

MODEL EVALUATION / RED-TEAMING / PROMPT ENGINEERING

04

Capabilities

FRONTEND & PRODUCT

Interfaces people actually use — React, Vue, Next.js, design systems, motion, and the judgment to know when a dropdown should be a sentence.

AI SYSTEMS

Agentic pipelines in production: MCP servers, vector retrieval, eval harnesses, red-teaming. I build the systems and break them too.

CLOUD & INFRA

AWS (Certified Developer — Associate), Cloudflare Workers, Docker, Kubernetes, Postgres, Redis, Elasticsearch. Ship it, then keep it cheap.

05

About

Language as a system.
Computation as a craft.

I studied Linguistics & Computer Science at UCLA — an odd pairing that turned out to be perfect training for the LLM era. Most of what I build now sits exactly at that intersection.

Off the clock I'm on Summoner's Rift. A decade of League of Legends keeps leaking into my work — RiftElo exists because I wanted the Riftbound community to have real competitive ratings, and my current side quest is an MMORPG built almost entirely by AI agents. I ship for communities I'm actually part of.

EDUCATION
UCLA — B.A. LINGUISTICS & COMPUTER SCIENCE, 2022
CERTIFICATION
AWS CERTIFIED DEVELOPER — ASSOCIATE
BASE
LOS ANGELES, CA
06

Contact

Looking for full-stack or AI-systems roles.
If I'd fit your team — my inbox is open.

GET IN TOUCH KEVINYINDEVELOPMENT@GMAIL.COM