CCTS: thesis into verification tooling
An 8k+ LOC Spring Boot service that joins Pact contracts, event logs, MongoDB, RabbitMQ, and state-model checks for event-driven microservice testing.
Backend & Platform Engineer / Taipei, Taiwan
ChuFei Wu
Backend and platform engineer connecting event-driven research, production delivery, and home-lab operations.
I am strongest where software architecture has to meet deployment, messaging, data, and real operational consequences.
8k+ CCTS research system LOC
40k+ PDAS / payment platform LOC
30+ home-lab services operated
127 public GitHub repositories
Engineering dossier
The story is not just stability. It is proof under pressure.
I am a software engineer and service developer with an M.S. and B.S. in Computer Science and Engineering from National Taiwan Ocean University. My strongest through-line is reliability: service design, event flow validation, deployment, and operations.
At SOSELAB, my thesis work became CCTS, a Composite Contract Testing Service for event-driven microservices. It combines Pact contracts, runtime event logs, and state-model validation so testers can detect missing transitions and execution failures instead of trusting happy-path demos.
At ITRI, I worked on the Personal Data Authorization System and a personal-data valuation/payment platform. The work touched logging, payment, blockchain, third-party fintech, CI/CD, infrastructure, and delivery on Azure Kubernetes Service.
Outside formal roles, I run a home-lab with 30+ services across storage, DNS, monitoring, media, albums, and home automation. That environment keeps my platform work honest because I live with the operational consequences.
PDAS: research with customer delivery pressure
Worked across logging, payment, blockchain, fintech integration, CI/CD, infrastructure, and AKS delivery for personal-data authorization and valuation/payment systems.
Operations as a real feedback loop
Runs 30+ home-lab services and maintains internal CNC manufacturing systems, so platform decisions are tested by actual uptime, storage, network, and maintenance constraints.
Research environment
SOSELab is the context behind the CCTS and PDAS line.
The lab connection matters because it explains why my backend work keeps returning to service-oriented architecture, event flow, testing, and reliability.
SOSELab — Service-Oriented Software Engineering Laboratory
SOSELab studies software engineering techniques and service-oriented computing applications, with research directions that include microservice testing, monitoring, retrieval/search, service-oriented architecture, and chatbot application architecture.
碩士論文：事件驅動微服務系統之契約測試暨端到端測試研究 · 2022/7
SOSELab publication records list the CCTS APSEC 2022 work, the TCSE 2022 Best Chinese Paper, NCS 2021 personal-data valuation/payment work, and ICS 2020 PDAS work.
Experience map
Research, internship delivery, internal systems, and public collaboration.
These are the contexts behind the portfolio claims, not decorative labels.
Research Assistant · Thesis Author
SOSELAB, NTOU CSEDesigned and implemented CCTS — a contract-testing framework for event-driven microservice systems. Published at IEEE APSEC 2022, received the 2022 TCSE Best Chinese Paper Award, and maintained related PoC services for orchestrator/payment/points/logging flows.
Software Engineer Intern
Industrial Technology Research Institute (ITRI) · PDAS-teamResearched, designed, implemented, and delivered personal-data authorization and valuation/payment systems. Worked across decentralized architecture, microservices, event-driven design, CI/CD, security, blockchain, third-party finance, AKS deployment, and delivery documentation.
MIS / Internal Systems Maintainer
Ming-Chyuan Ltd.Maintains and modernizes digital systems for CNC manufacturing workflows, moving legacy products toward more reliable internal architecture while targeting high availability.
Teaching Assistant
National Taiwan Ocean UniversityHelped migrate legacy course content into a newer content-management workflow and supported professors with lesson design and assigned customization.
Open-source Collaborator
g0v civic tech community · public OSS projectsContribute across personal infrastructure, team projects, and public OSS workflows. Pattern: cleanup, integration, correctness.
Published research
Event-driven systems, authorization, payment, and testability.
Two IEEE publications and three domestic conference papers connect backend engineering to formal software engineering research.
Testing for Event-Driven Microservices Based on Consumer-Driven Contracts and State Models
Introduces CCTS (Composite Contract Testing Service), a testing tool for event-driven microservices. Combines consumer-driven contract testing with event-driven state models to record state transitions of event exchange between services and automatically retrieve possible transition paths.
PDAS: A Digital-Signature-Based Authorization Platform for Digital Personal Data
Uses Citizen Digital Certificate, digital signature, and blockchain to establish an authorization system (PDAS) for digital personal data. Enables safe, undeniable, and tamper-proof data authorization contracts that address legality, security, and multi-user authorization.
事件驅動微服務系統之複合契約測試機制
Composite Contract Testing for Event-Driven Microservice Systems
2022 台灣軟體工程研討會 (TCSE) · 臺北 · 政治大學 最佳中文論文獎 · Best Chinese Paper Award數位個人資料授權之計價與雙向支付平台之系統設計
Pricing and Bidirectional Payment Platform for Digital Personal Data Authorization
2021 全國計算機會議 (NCS) · 臺中 · 東海大學基於數位簽章之個資授權平台設計
Design of a Digital-Signature-Based Personal Data Authorization Platform
2020 台灣軟體工程研討會 (TCSE) · 嘉義 · 嘉義大學Selected work
Projects that show different kinds of ownership.
Java · Spring Boot · RabbitMQ · MongoDB
CCTS
Composite Contract Testing Service — my NTOU thesis system and APSEC 2022 paper implementation. It combines Pact contracts, event-log sequence validation, and state-model checks to catch missing transitions and execution failures in event-driven microservices.
APSEC 2022 · TCSE Best Chinese Paper · 8k+ LOC Java · Spring Boot · Docker · Fly.ioHideReplier
Anonymous Discord reply bot built for the NTOU CS Discord context. It grew from a course project into a containerized service with CI/CD, Docker Hub image flow, and Fly.io deployment.
Full lifecycle side project · 10 stars Docker · Linux · NAS · MariaDB · SDNmyServices
Home-lab service configuration and operations notes. The broader environment runs 30+ services across storage, DNS, monitoring, media, albums, and home automation with VM/container integration.
30+ services · real operating environment Shell · Docker · IPMI · ESXi · NVIDIAiDRACFanSpeedControl
Dell PowerEdge fan control through iDRAC/IPMI with Docker deployment, NVMe/GPU temperature inputs, configurable thresholds, and a recent README/code audit around fail-safe behavior.
Dell R730XD tested · 10 stars React 19 · TypeScript · Firebase · GitHub PagesBehaviorMonitor
A behavior tracking and management system with real-time score display, admin panel, charts, logs, lazy updates, Firebase backend, and GitHub Pages deployment.
Full-stack AI-assisted prototypeTechnical surface
Backend depth with platform, SQA, and operations range.
The stack is broad because the work has ranged from microservice research and AKS delivery to CNC internal systems and home-lab operations.
Languages
JavaGoPythonShellTypeScriptJavaScriptCSolidity
Runtime & Web
Spring BootGinDjangoNode.jsExpressAngularVue
Infrastructure
DockerLinuxNginxJenkinsKubernetesAKSESXiUnraidTrueNAS
Data & Messaging
MongoDBMariaDBMySQLRedisPostgreSQLSQLiteRabbitMQKafka
Engineering Practices
Microservices architectureEvent-driven designConsumer-driven contract testingDevOps & CI/CDHome-lab operations
Collaboration trail
Contributions show a pattern: integrate, correct, localize, document.
Cleanup Quality refinement for maintainable iteration stanley2058/lilac-mono #5 Integration Custom Tavily API endpoint support stanley2058/lilac-mono #4 Feature Exa web search provider integration stanley2058/lilac-mono #1 i18n Traditional Chinese localization and documentation Minidoracat/mcp-feedback-enhanced #138 Fix Documentation correctness yym68686/ChatGPT-Telegram-Bot #111 Infra Custom domain registration is-a-dev/register #19293
Hiring fit
Where this background creates leverage quickly.
Backend Engineer
Service delivery with microservice, event-driven, API, messaging, and persistence experience
Platform Engineer
Deployment-aware engineering across containers, Linux, storage, network, and operational automation
Systems-Oriented SWE
Practical architecture decisions under research, customer-delivery, and public collaboration constraints
Map architecture boundaries. Find where the team loses time.
Small, targeted fixes. Reduce friction before adding features.
Measurable reliability gains. Nobody stayed late because of my code.
Beyond code
Systems thinking does not stop at the repo.
Off-repo inputs 04 signals
Event-driven distributed systemsHome-lab infrastructure and self-hostingCivic tech (g0v community)Archery — former university club leader
Contact
Looking for backend execution with research discipline and operational memory?
Teams building reliable services, platform infrastructure, event-driven systems, or data authorization/payment workflows are the best fit.