console / current signal

Online / available

Yifeng Lin — Frontend Systems Engineer

I build frontend systems, AI-assisted engineering workflows, and Cloudflare-native tools with a focus on clarity, performance, and operational detail.

React 19Vue 3TypeScriptTanStack StartNext.js

Open missions Transmit signal

Yifeng Lin

Operational UI, agent workflows, and frontend systems that hold up in production.

Mode

Frontend Systems Engineer

Location

Shanghai / Remote

Signal

Open to frontend platform, AI tooling, Cloudflare-native product, and performance-focused engineering roles.

01Active system

Agent Gateway

AI code review, PRD-aware planning, execution logs, provider boundaries, and GitLab/Feishu workflow surfaces.

02Active system

Performance Diagnostics

TTFB, LCP, hydration stability, render blocking, SSR debugging, SEO checks, Lighthouse, Sentry, and DevTools evidence.

03Active system

Cloudflare CMS

Markdown-first publishing, admin tooling, preview/publish controls, Workers runtime, D1, R2, KV, and feed generation.

Current Signal

Frontend systems with product workflow, runtime evidence, and sharp operational feedback.

The work sits between interface architecture, agent systems, performance diagnostics, and Cloudflare-native infrastructure.

Current signal: frontend systems where product workflow, runtime behavior, and interface architecture have to stay aligned.

Recent work centers on agent workflows: AI code review, planning jobs, execution state models, provider boundaries, and Feishu/GitLab integrations.

I also maintain Cloudflare-native publishing infrastructure for this site, including Markdown CMS tooling, preview/publish controls, assets, RSS, and sitemap generation.

Selected Missions

Systems across agent workflows, CMS infrastructure, and SSR performance.

A compact view of the work that best matches the current direction: AI tooling, developer productivity, and full-stack frontend systems.

Open mission archive

Mission

2025–Present

XMOV Bot Gateway

AI-driven agent gateway for code review and planning, with GitLab MR automation, Feishu callbacks, and execution-state visualization.

Problem

Engineering teams needed AI review and planning workflows that were observable, bounded, and connected to real GitLab/Feishu operations.

Role

Frontend systems, workflow modeling, provider/UI boundaries

Status

Active production system

TypeScriptReactNode.jsHonoGitLabFeishuAI Agents

Impact

Reduced manual review effort and created a scalable foundation for risk screening, review aggregation, and PRD-aware planning workflows.

System highlight Serial, observable agent execution with honest provider capability display and review result persistence.

Built for clarity, evidence, and maintainability.Archive

Mission

2026

Blog & CMS on Cloudflare

Edge-native blog and CMS system using Workers, D1, R2, and KV, with Markdown authoring, admin workflows, and hybrid static/dynamic rendering.

Problem

The portfolio needed to become a durable publishing system without splitting into a separate backend or heavy CMS product.

Role

Personal project, full-stack frontend, Cloudflare runtime

Status

Live foundation, iterating

TypeScriptTanStack StartCloudflare WorkersD1R2KVCMS

Impact

Built a lightweight publishing foundation with low-latency delivery and clear operational boundaries for a personal engineering console.

System highlight Single TanStack Start app with server-side Cloudflare bindings, D1 posts/settings, R2 assets, and admin safety controls.

Built for clarity, evidence, and maintainability.Archive

Mission

2021–2024

SSR Performance & Admin Systems

Built Vue and React H5/admin systems, handled complex forms and state logic, and optimized SSR render paths for production surfaces.

Problem

Production H5 and admin surfaces needed faster first loads, clearer monitoring, and maintainable state-heavy workflows.

Role

Frontend delivery, performance diagnostics, production debugging

Status

Archived experience base

VueReactNuxtTypeScriptLighthouseSentrySSR

Impact

Improved frontend observability and first-load performance through render-pipeline optimization, blocking-request cleanup, and Sentry integration.

System highlight TTFB/LCP investigation, request-chain cleanup, SSR render path tuning, and monitoring-driven regression analysis.

Built for clarity, evidence, and maintainability.Archive

Engineering Logs

Field notes from the systems behind the surface.

Writing stays close to implementation: frontend delivery, CMS architecture, performance tradeoffs, and operational UI decisions.

field-note

Editorial systems for small sites

Design systems / Frontend

Reading width, reusable surfaces, and layout rhythm treated as infrastructure.

build-log

Shipping portfolio pages on Cloudflare

Workers / D1 / TanStack

Keeping a Cloudflare-first SSR site light while the CMS foundation grows under it.

experiment

CMS safety and publishing controls

Admin tooling / R2

Preview, publish, archive, asset reference checks, and admin boundaries for a personal console.

Open logs

Stack / Arsenal

Tools grouped by the systems they support.

Frontend frameworks, runtime evidence, Cloudflare infrastructure, AI workflows, and interaction polish.

Frontend

React 19Vue 3TypeScriptTanStack StartNext.jsNuxt

Runtime

SSRHydrationHonoNode.jsBunWeb Vitals

Infrastructure

Cloudflare WorkersD1R2KVWranglerGitLab CI

AI Tools

Agent GatewayAI Code ReviewPlanning JobsProvider RoutingExecution Logs

Design / Interaction

Operational UIMotionLenisSEO DiagnosticsSentry

Transmission

If the work sits between agent systems, operational UI, and frontend architecture, I should be useful.

Open to remote and AI startup rolesinifeng@outlook.com