~/zr
ZR
CS postgrad · C++ · relearning everything, properly this time
什么时候才能摆烂啊!!!!!!
个人资源 + 备忘录。
- site
- zhenyuruan.com
- owner
- ZR
- status
- online
- path
- UniMelb → HKU postgrad
- host
- zr@aws-tokyo
- edge
- nginx · cloudflare
quick links
- about/CV · journey · certs · projects
- blog/技术心得
- links/收藏夹
- downloads/下载中心 · 学习资料 / 工具 / 模板
- reading/阅读清单
- private material/私密资料 (需要密码)
stack
- AWS
- Cloudflare
- Linux
- nginx
- Python
- Bash
- Docker
- tmux
about/
Software engineer · cs & security student · UniMelb → HKU postgrad
summary
B.Sc. graduate in Computing & Software Systems from the University of Melbourne — completed Jun 2026 — now a postgraduate student at the University of Hong Kong (since Sep 2026). Three internships completed spanning UAV algorithm engineering, production computer-vision pipelines (Hikvision · YOLO / DeepSORT / NMS), and government data platforms. Transitioning toward systems & security engineering — operating a self-built multi-region AWS infrastructure as a live portfolio while pursuing a 7-cert multi-cloud + cyber/risk certification track (AWS · Azure · IaC · ISC2 · ISACA), targeting HK fintech cyber/risk roles.
journey · done / now / next
Education
B.Sc. complete · UniMelb 2026.06 · postgrad @ HKU, in progress
-
2023.06 — 2024.06
B.Sc., Computer Science & Data Science University of Sydney
Foundational year focused on programming, data science, and informatics; transferred to UniMelb to continue B.Sc.
completed -
2024.07 — 2026.06.23
B.Sc., Computing and Software Systems University of Melbourne
Coursework focus: AI / ML, software systems, computer security.
completed -
2026.09 — 2027.08
Postgraduate study University of Hong Kong
School of Computing & Data Science · 1-year full-time (72 cr · 60 coursework + 12 cr Computing Technology Practicum 360h industrial) · currently enrolled, Semester 1 of 2026–27.
in progress
Experience
3 internships complete · seeking new-grad role 2026 Q4
-
2023.11 — 2024.01 · 3 mo
UAV Algorithm Intern Zhejiang Public Information Industry · UAV Application Tech Research Institute
Contributed to core UAV control algorithms (flight stability, route planning, sensor fusion). Improved response speed and path accuracy of low-altitude inspection tasks by ~15% through PID parameter tuning and trajectory-planning refinement. Owned multi-scale aerial-image calibration, sensor data cleaning & fusion, plus end-to-end module integration for flight control + data acquisition + task-instruction pipelines.
completed -
2024.06 — 2024.08 · 3 mo
AI Algorithm Intern Hangzhou Hikvision · Software Development Dept.
Built training frameworks for object detection (YOLO / SSD) and multi-object tracking (DeepSORT). Owned the data-preprocessing pipeline (annotation, cleaning, augmentation, label-consistency), developed the NMS & tracking-ID association module, and designed modular interfaces for the detection-tracking-classification pipeline. Shipped model export tools and an automated testing framework; familiarised with Hikvision's AI Open Platform architecture.
completed -
2024.11 — 2025.02 · 4 mo
Data Platform Intern Big Data Development & Management Center · Shangyu District, Shaoxing
Contributed to the public data platform: data-resource integration, system-function optimisation & testing, and performance evaluation tracking for informatisation projects. Also worked on OA paperless-office software — requirements research, functional design, and module implementation & debugging.
completed -
2025.02 — present
Full-time student · self-directed learning
B.Sc. completed at UniMelb (Jun 2026). Operating a self-built multi-region AWS infrastructure as a live portfolio. Studying for AWS / security certifications. Continuing to postgrad at HKU in Sep 2026.
building portfolio · prepping for postgrad -
2027 summer
Postgrad-period industry internship
Open to internships during the HKU postgrad summer break — HK / SG / AU / remote.
targeting -
2027 Q3 — Q4 · after HKU
New-grad software / security engineer role
Open to: HK · AU · Singapore · remote. Areas of interest: cloud security, platform engineering, applied ML.
targeting
Certifications
5-cert long game · 3 in postgrad year · 2 in early career
-
target 2026.09
AWS Solutions Architect — Associate SAA-C03
In preparation — course coverage through Aug, then a focused sprint (hands-on labs + practice exams) in Sep. Foundation for the AWS track.
in prep · targeting late sep -
queued · after SAA-C03
HashiCorp Terraform Associate 003
Infrastructure-as-Code competency — IaC keyword match on cloud security / DevSecOps JDs.
planned -
target 2027.01-02 · HKU Sem 2
AWS Certified Security — Specialty SCS-C02
Deepens cloud-security: IAM, KMS, GuardDuty, incident response. Core technical anchor for SecEng roles.
planned -
target 2027-2028 · early career year 1
(ISC)² CISSP Associate Pre-experience track
Take exam after entering industry → Associate of (ISC)² status (6-year window to accrue 5-year experience requirement). Industry-standard for security leadership. Often employer-reimbursed.
planned -
target 2028 · early career year 2
ISACA CISA Certified Information Systems Auditor
Industry-standard for banking IT Risk / Audit. Complements technical cloud stack with governance authority.
planned
selected projects · timeline
Builds
6 projects · 1 live · 5 completed
-
2025 — present · personal
zhenyuruan.com — multi-region personal cloud infrastructure
[AWS · Nginx · Cloudflare · TLS · DLM]
Architected and have operated for 12+ months a multi-region AWS infrastructure (ap-northeast / ap-southeast / us-west) under real production constraints — handling incidents, rotating credentials, recovering from a volume-mount disaster via EBS surgery. Stack: Nginx reverse proxy with TLS termination, Cloudflare CDN with proxied DNS, automated EBS snapshot lifecycle via Data Lifecycle Manager, Git-backed deploy workflow. Hosts a terminal-themed personal site with an HTTP-auth-protected private archive.
live · in build -
2025.07 — 2025.11 · team of 5 · UniMelb IT Project
Algorithms in Action — Interactive Sorting Visualization Platform
[Java · Gradle · Git · Figma · Confluence]
Capstone IT-project course with a 5-member agile team enhancing Algorithms in Action, an interactive platform for teaching algorithm design and performance. Designed and implemented the unified Stack Panel interface for sorting-algorithm visualisation, ensuring consistent animation and interaction standards across Quicksort, Merge Sort, and Radix Exchange. Coordinated UI behaviour, pseudo-code integration, and explanation text across modules with the Insertion / Selection team. Prepared three alternative Stack Panel versions, presented to the client, collected feedback, and finalised the unified display spec. Managed Git version control and maintained Confluence documentation for transparency & reproducibility.
completed -
2024.10 · group leader · UniMelb
Crime Rate Analysis across Victorian LGAs
[Python · pandas · scikit-learn · ML]
Built an integrated dataset combining socio-economic (IRSD, income, unemployment), demographic (education attainment, lone-parent families), and environmental (remoteness, housing, healthcare access) factors. EDA via correlation heatmaps, geographic crime plots, and offence-trend analysis. Trained and compared ML models (linear & ridge regression, random forest, K-means) — finding remoteness and socio-economic disadvantage as the strongest predictors. Delivered a 4000+ word analytical report with a reproducible codebase supporting policy recommendations.
completed -
2024.04 — 2024.06 · individual · USyd · HD 18.15/20
Java Multiplayer Tank Battle Game
[Java · Processing · Gradle · JUnit · JaCoCo]
2D multiplayer tank-battle game with multi-level maps (28×20 terrain grid with dynamic destruction), turn-based controls, real-time scoring, projectile physics under gravity/wind, explosion area-damage, power-ups, and persistent scoreboards across levels. OO design with class-hierarchy + UML documentation; JUnit test suite reaching 90%+ coverage via JaCoCo.
completed -
2023.09 — 2023.10 · individual · USyd · 28.15/30
Online Exam System (CLI)
[Python · CLI · modular design]
Python-based CLI examination system. Supports multiple question types (MC, fill-in-the-blank) with input validation and instant feedback. Instructor flow for creating & assigning exams; time limits, progress tracking, secure access controls; automated marking. Refactor cycle reduced redundant code by ~30% via modular programming.
completed -
2023.08 — 2023.10 · group leader · USyd
Road Fatalities Data Analysis & Prediction (AU + NZ)
[Python · pandas · matplotlib · scikit-learn]
Three-stage Python project analysing road fatalities across Australia and New Zealand. Stage 1: collected and cleaned NSW / VIC / NZ datasets and built an integrated dataset with metadata. Stage 2: EDA on crash frequency vs. speed limits, time of day, road type, and weekday/weekend patterns; produced grouped aggregates and multi-attribute visualisations. Stage 3: trained linear-regression models to estimate cross-continent (Europe / Asia / Americas) death rates, evaluated via MSE / R². Delivered an analytical report with evidence-based traffic-safety recommendations.
completed
skills
- AI / ML
- Target detection · tracking · training pipelines · post-processing
- Cloud / Infra
- AWS (EC2, EBS, DLM, Route 53) · Nginx · Cloudflare · Linux (Ubuntu)
- Security
- TLS · mutual auth · network hardening · backup & recovery
- Programming
- Python · Java · C · C++ · R · Bash · JavaScript · HTML/CSS
- Languages
- Mandarin (native) · English (fluent)
contact · links
links/
常用资源 · AI · Cloud · Certs · Dev · Misc
AI / LLM Chat
- Claude — Anthropic 主力
- ChatGPT — OpenAI
- Gemini — Google
- Perplexity — search-grounded AI
- Microsoft Copilot — GPT-4 免费入口
- DeepSeek — 国内可访问
- Poe — 多模型聚合
AI / LLM API & Dev
- Anthropic Console — Claude API
- OpenAI Platform — GPT API
- Google AI Studio — Gemini API (有免费层)
- DeepSeek Platform — 低价 API
- xAI Grok
- Mistral Console
- HuggingFace — 模型仓库 + Spaces
- OpenRouter — 多模型统一 API
- Anthropic Docs
- OpenAI Docs
- LM Studio — 本地跑模型
- Ollama — CLI 本地推理
AWS
- AWS Console (general)
- Tokyo Console (ap-northeast-1)
- Melbourne Console (ap-southeast-4)
- Oregon Console (us-west-2)
- AWS Skill Builder — 官方课程平台
- AWS Certification — 认证总览
- AWS Exam Prep
- AWS Documentation
- AWS Architecture Center
- Well-Architected Framework
- AWS Pricing Calculator
- AWS Health Dashboard — 区域故障状态
- AWS Free Tier
- AWS Marketplace
Certifications · ISC2 / ISACA
- ISC2 主站
- ISC2 CC — 入门 (free for first)
- ISC2 CISSP
- ISC2 CCSP
- ISACA 主站
- ISACA CISA
- Pearson VUE — 考试预约 (CISSP / SAA)
- Credly — 数字徽章
Learning · Courses
- Adrian Cantrill — AWS 王者级课程
- Tutorials Dojo (Jon Bonso) — 模拟题必买
- Udemy — Stephane Maarek 系列 (打折买)
- Whizlabs — 备用模拟题源
- A Cloud Guru (现 Pluralsight)
- Coursera
- MIT Missing Semester — CS 缺失的一学期
- OverTheWire Bandit — shell 闯关
Dev Utilities
- GitHub
- Stack Overflow
- MDN Web Docs
- DevDocs — 离线文档聚合
- explainshell.com — 逐 token 解释 shell
- regex101 — 正则测试
- crontab.guru — cron 解析
- Can I Use — 浏览器兼容
- JSON Formatter
- Transform.tools — JSON↔YAML↔TS 互转
- Carbon — 代码截图美化
- CodeSandbox — 在线 IDE
- StackBlitz — 浏览器内全栈环境
- Replit — 云 IDE
- Bundlephobia — npm 包体积
- npm trends — 包流行度对比
- Shields.io — README 徽章生成
- gitignore.io — gitignore 模板
Design / Diagram
- Excalidraw — 手绘风白板
- tldraw — 协作白板
- diagrams.net (draw.io) — 流程图 / 架构图
- Mermaid Live — 文本生成图表
- Coolors — 配色方案生成
- RealFaviconGenerator — 全平台 favicon
- Squoosh — Google 出品图片压缩
- TinyPNG — 智能压缩
- Unsplash — 免费高质量摄影
- Pexels — 免费图库 + 视频
- Emojipedia — emoji 查找
Web Test / Inspect
- SSL Labs Test — 证书 / TLS 评分
- SecurityHeaders.com — HTTP 安全头评级
- PageSpeed Insights — Google 速度评分
- WebPageTest — 深度性能分析
- GTmetrix
- BuiltWith — 任意站点技术栈
- Wayback Machine — 互联网档案
- MXToolbox — DNS / MX / 黑名单查
- DNSChecker — 全球 DNS 传播查
- Uptrends Tools
Security / Privacy
- Have I Been Pwned — 邮箱泄露查
- VirusTotal — 文件 / URL 病毒扫
- Shodan — 联网设备搜索
- urlscan.io — URL 安全分析
- NVD (NIST) — CVE 漏洞数据库
- Exploit-DB
- EmailRep — 邮箱信誉查
- Privacy Guides — 隐私工具推荐
Cloudflare
- Cloudflare Dashboard
- Cloudflare Docs
- Cloudflare Radar — 全球流量 / 攻击情报
- 1.1.1.1 DNS
Anime · 娱乐
- AGE 动漫 (age.tv)
- Bangumi — 番组数据库 (国内)
- MyAnimeList — 国际番剧 DB
- AniList — 现代化 anime tracker
downloads/
下载中心 · 资源持续更新
学习资料
工具 / 软件
模板 / Templates
待上传 — 简历 / Cover Letter / 个人项目结构模板
其他
待上传
上传指南
单文件上传:
scp ~/Desktop/yourfile.pdf Tokyo:/tmp/
ssh Tokyo "sudo mv /tmp/yourfile.pdf /var/www/zhenyuruan.com/downloads/ && sudo chown www-data:www-data /var/www/zhenyuruan.com/downloads/yourfile.pdf"
整目录上传:
rsync -avz ~/Desktop/resources/ Tokyo:/tmp/resources/
ssh Tokyo "sudo mv /tmp/resources/* /var/www/zhenyuruan.com/downloads/ && sudo chown -R www-data:www-data /var/www/zhenyuruan.com/downloads/"
上传后, 在这里加 download-card:
<a href="/downloads/yourfile.pdf" class="dl-card" download>
<div class="dl-type">PDF</div>
<div class="dl-info">
<div class="dl-name">Your File Name</div>
<div class="dl-desc">一句话描述</div>
<div class="dl-meta">
<span>PDF</span>
<span>2.4 MB</span>
<span>2026-05-11</span>
</div>
</div>
<div class="dl-btn">Download</div>
</a>
文件类型标签 (dl-type) 推荐: PDF · XLSX · ZIP · VIDEO · AUDIO · IMG · MD · BIN · PLUGIN
reading/
书单 & 文章
当前在读
- CISSP All-in-One Exam Guide — Shon Harris
计划读
- Designing Data-Intensive Applications — Martin Kleppmann
- The Web Application Hacker's Handbook
- Linux 内核设计与实现
已读 / 推荐
- (待补)