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I am a Ph.D. student specializing in Digital Learning and Education, with expertise in programming, visual design, and video editing. My research focuses on virtual reality and game-based learning, bridging technology and education. I have practical experience teaching programming and English, which equips me with a unique perspective on engaging learners effectively. In addition to my technical skills in PHP and C#, I am passionate about organizational leadership and public speaking. My role as a peer reviewer for academic articles in Educational Technology has honed my analytical skills and attention to detail. I am eager to collaborate on projects that enhance educational experiences or incorporate innovative technology solutions. If you're looking for a proactive partner who can blend creativity with technical expertise, let's connect and explore how I can bring value to your project.

👋 Hi, I’m Kai. Thank you for visiting my profile! I am a full-stack developer with 8+ years of experience. My primary focus is developing and maintaining B2B and B2C web and mobile applications, as well as internal enterprise systems, for both large corporations and startups. I have been working as a software engineer in software companies, and in 2024 I transitioned into freelancing. 💻 Technical Skills Frontend ✅ React.js / Next.js ✅ HTML, CSS, JavaScript ✅ TypeScript, Flow ✅ Tailwind CSS, Sass (SCSS syntax) ✅ UI Libraries: shadcn/ui, Ant Design, etc. ✅ State Management: Redux, Zustand ✅ API Integration: Axios, React Query, GraphQL ✅ Responsive Web Design ✅ Storybook (Component-Driven Development) ✅ React Native / Expo Backend ✅ Node.js / NestJS / Express / Prisma / TypeORM ✅ Go / Gin / sqlc ✅ Python / Flask / FastAPI ✅ RESTful API Design ✅ Authentication & Authorization (JWT, OAuth2, etc.) ✅ Relational Databases: SQL Server (MSSQL), PostgreSQL ✅ NoSQL Databases: MongoDB DevOps & Infrastructure ✅ Microsoft Azure Services: App Service, Application Insights, etc. ✅ Azure DevOps CI/CD, Artifacts ✅ Docker / Containerization ✅ Git (Version Control) Testing & Quality ✅ Unit & Integration Testing (Jest) ✅ Clean Code / Code Quality Best Practices Project Management ✅ Agile / Scrum 😊 I’m always open to communication, so please feel free to reach out with any questions. I look forward to understanding your needs clearly and supporting you in achieving your goals. Thank you for taking the time to review my profile — I truly hope we’ll have the chance to work together! ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ My Side Projects I’ve uploaded various small personal projects to my GitHub that are independent of my professional work — including mini games I built in the past, practice projects, and small utilities I created for personal use. Here are a few selected projects that are more complete and suitable for showcasing. Please feel free to take a look. Any feedback or suggestions are always welcome. Thank you! 1️⃣ Shopping Cart API 🛒 - Tech Stack: Node.js / NestJS / Docker / PostgreSQL - GitHub Repository: github.com/feng619/shopping-cart-nestjs Developed a backend API for an e-commerce shopping cart system using NestJS. The project includes containerized deployment with Docker and data persistence via PostgreSQL, demonstrating modular architecture and RESTful API design principles. 2️⃣ Fashion Store Homepage Layout 🛍️ - Tech Stack: Next.js / Tailwind CSS / TypeScript / Responsive Web Design (RWD) - GitHub Repository: github.com/feng619/fashion-store - Live Demo: fashion-store-ten.vercel.app Designed and implemented a responsive e-commerce homepage using Next.js and Tailwind CSS. Focused on clean UI composition, TypeScript type safety, and optimized performance across devices. 3️⃣ Snake Game 🎮 - Tech Stack: Vue 3 / Vuex - GitHub Repository: github.com/feng619/snake - Live Demo: feng619.github.io/snake Built a classic Snake game using Vue 3 and Vuex for state management. Implemented smooth animations and game logic while maintaining a lightweight and responsive frontend experience.

Cybersecurity professional with a master’s degree in cybersecurity and hands-on experience across key domains, including vulnerability management, digital forensics, penetration testing, and governance, risk, and compliance (GRC). Skilled in deploying and managing advanced security tools like Wazuh, Splunk, and SIEM, I bring a robust background in securing digital infrastructures within the banking and IT sectors. I am passionate about helping organizations protect their assets and enhance their cyber defenses through effective consulting and technical expertise. With a keen interest in practical security, threat detection, and process automation, I leverage platforms such as LetsDefend and TryHackMe to refine my skills continually. Now, as a freelance cybersecurity consultant, I’m dedicated to delivering customized solutions that strengthen cybersecurity frameworks, ensure compliance, and mitigate risks for diverse clients. All reports are written from hands-on, manual analysis — never AI-generated. I rely on industry tools to support, not replace, my expert validation.

Earned Upwork Top Rated badge at least twice 🎖️ My Main list of Services: ✔️ Executive Virtual Assistant ✔️ Game Developer ✔️ Customer Support (Inbound and Outbound Calls), Email and Chat Support ✔️ Appointment Setter for Fitness Coaches and Regular Clients ✔️ Social Media Manager ✔️ Linkedin Outreach ✔️ Wordpress Editor VA ✔️ Video Editor ✔️ Upscale Videos ✔️ Data Collection Tools & Platforms I Work With: • LinkedIn & Sales Navigator • Canva (for content creation) • CRM tools (Salesforce, Airtable, Trello, Slack, etc.) • Calendly & scheduling platform Over the years, I’ve supported clients across different industries by providing LinkedIn outreach, appointment setting, email/chat support, and general VA services that keep their businesses running smoothly.