Public Repository
dmy-ecommerce-app-nextjs
Modern e-commerce demo built with Next.js, React, and Tailwind CSS, with product browsing, search, cart, and responsive UI flows.
Next.jsTypeScriptTailwind CSS
View RepositoryChengjun Zhang
Full Stack & AI Software Engineer
Building intelligent full-stack products and AI-powered solutions
Software engineer focused on full-stack web development, AI integration, and high-performance digital products.
Open to freelance work and collaborations
ENGINEER - DEVELOPER - ENTHUSIAST - COFFEE LOVER - ENGINEER - DEVELOPER - ENTHUSIAST - COFFEE LOVER - ENGINEER - DEVELOPER - ENTHUSIAST - COFFEE LOVER - ENGINEER - DEVELOPER - ENTHUSIAST - COFFEE LOVER - ENGINEER - DEVELOPER - ENTHUSIAST - COFFEE LOVER - ENGINEER - DEVELOPER - ENTHUSIAST - COFFEE LOVER - ENGINEER - DEVELOPER - ENTHUSIAST - COFFEE LOVER - ENGINEER - DEVELOPER - ENTHUSIAST - COFFEE LOVER -
AboutMe
I am a software engineer with a strong foundation in AI, machine learning, and modern web development. I build products that balance technical reliability, performance, and thoughtful user experience.
My work spans full-stack applications, automation systems, AI integrations, and interactive front-end experiences. I am especially interested in practical LLM systems, production-ready ML workflows, and scalable cloud-based solutions.
AI Product Engineering
Building AI-powered applications, internal tools, and user-facing products with practical real-world value.
LLM Integration and Automation
Designing prompt workflows, agent systems, and business automation powered by modern language models.
Full-Stack Web Development
Developing scalable web platforms with strong UX, clean architecture, and reliable backend systems.
Computer Vision Solutions
Creating vision-based systems for detection, monitoring, classification, and intelligent image workflows.
TechnicalSkills
AI / MLPro
AI IntegrationPro
Prompt EngineeringPro
PythonPro
Full-Stack Web DevelopmentPro
JavaScript / TypeScriptPro
SQL / NoSQLAdvanced
LLM Workflows and AutomationAdvanced
Computer VisionAdvanced
Data AnalyticsAdvanced
Cloud (AWS / GCP)Advanced
Data VisualizationAdvanced
C#Advanced
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Projects Completed
0+
Happy Clients
0+
Years Experience
0%
Client Satisfaction
Experience
AI Engineer
Freelancer
Remote
Remote
2024-11 - 2026-03
Designed and optimized AI atumation / workflows, improving response quality, accuracy, and product usefulness.
Key Achievements:
- ▹Improved model output quality through structured prompt design and evaluation
- ▹Collaborated on AI-focused workflows and research-aligned problem solving
- ▹Contributed to production-facing prompt engineering efforts at scale
PythonLLMsPrompt EngineeringNLPCloud Computing
Senior Full Stack developer
Synergy Labs
Singapore
Remote
2020-06 - 2024-11
Delivered web development, automation, and AI integration solutions for a range of client projects.
Key Achievements:
- ▹Completed 20+ projects with 5-star ratings
- ▹Built custom web applications and business-focused automation workflows
- ▹Specialized in practical AI-driven product features and integrations
JavaScriptTypeScriptPythonReactAI/ML
Volunteer Web Developer
i-HiddenTalent
Hong Kong
Hybrid
2016-07 - 2020-05
Developed and maintained websites for a non-profit organization.
Key Achievements:
- ▹Improved website performance by 30%
- ▹Enhanced user experience with responsive design
ReactFlaskPythonGit
Intern Software Engineer
CentLing Technologies
Qingdao, China
On-site
2015-06 - 2016-06
Assisted in developing and testing web applications.
Key Achievements:
- ▹Gained hands-on experience with modern development tools
- ▹Collaborated with senior developers to deliver quality code
HTMLCSSJavaScript
Education
Bachelor of Computer Science
City University of Hong Kong
Hong Kong
2011-05 - 2015-01
Studied core computer science concepts and specialized in software development and AI.
Achievements:
- ▹Graduated with honors
- ▹Completed a thesis on AI-driven web applications
- ▹Active member of the Computer Science Club
Certifications
AWS Certified Developer
Amazon Web Services
2023-06
ID: AWSD-9K4M-2P7X
Meta Front-End Developer
Meta
2022-12
ID: META-FE-8T2R-5LQ1
AI Engineer Professional Certificate
IBM
2024-03
ID: IBM-AIE-4N6V-1ZP3
Google Cloud Professional Data Engineer
Google Cloud
2023-09
ID: GCP-DE-7X5Y-3W8Z
Certified Kubernetes Application Developer (CKAD)
Cloud Native Computing Foundation
2024-01
ID: CKAD-9M3L-2Q7X
PORTFOLIO - PROJECTS - WORK - PORTFOLIO - PROJECTS - WORK - PORTFOLIO - PROJECTS - WORK - PORTFOLIO - PROJECTS - WORK -PORTFOLIO - PROJECTS - WORK - PORTFOLIO - PROJECTS - WORK - PORTFOLIO - PROJECTS - WORK - PORTFOLIO - PROJECTS - WORK -
Selected Work
Developer & Consultant
Patrick Adair Designs - Artisan Ecommerce
Custom Shopify store for a handmade jewelry brand with product personalization tools, a custom engraving interface, and mobile-first shopping optimization.
Custom ThemeLiquidJavaScriptCanvas API
Full-stack Developer
DreamCrust - Custom Bakery Platform
Specialized Shopify store for a bakery with pre-order flows, local delivery scheduling, and subscription management for recurring orders.
Shopify PlusCustom AppsDelivery APISubscriptions
Full-stack Shopify Developer
Clove & Hallow - Custom Theme Development
Custom Shopify theme for a clean beauty brand with advanced product filtering, subscriptions, AR try-on, and strong Lighthouse performance.
Custom ThemeShopify PlusReact ComponentsWebGL
Senior Shopify Developer
MD Solar Sciences - Plus Store Optimization
Shopify Plus optimization for a skincare brand with bundles, enhanced cart drawer functionality, and personalized shopping experiences.
Shopify PlusLiquidVue.jsStorefront API
Technical Lead
ZIIP Beauty - Headless Commerce Solution
Headless Shopify implementation with a custom React frontend, third-party service integrations, custom checkout, and analytics tracking.
Shopify Storefront APIReactNext.jsGraphQL
Migration Specialist & Developer
BeautyFix MedSpa - Store Migration & Setup
WooCommerce to Shopify Plus migration with medical spa theme customization, booking integration, and membership portal functionality.
Shopify PlusCustom AppsLiquidBooking API
App Developer
Altilis Beauty - Custom App Development
Custom Shopify app for subscription management, loyalty workflows, admin tooling, customer portal, and payment processor integrations.
Shopify App BridgeNode.jsReactPolaris
Performance Specialist
Boomer Naturals - Performance Optimization
Storefront performance audit and optimization with faster page loads, improved Core Web Vitals, optimized images, and script loading.
Performance OptimizationLiquidJavaScriptImage Optimization
Full-stack Developer
CK Soul - Lifestyle Brand Store
Custom Shopify theme for a wellness lifestyle brand with lifestyle-focused UI, blog integration, and custom product recommendations.
Custom ThemeLiquidCSS3JavaScript
Shopify Developer
Skout's Honor - Pet Brand Ecommerce
Comprehensive Shopify store for a pet products brand with subscriptions, pet profiles, personalized recommendations, and custom checkout flows.
Shopify PlusSubscriptionsLiquidJavaScript
B2B Specialist & Developer
Lunada Bay Tile - B2B Commerce Platform
B2B-focused Shopify Plus platform with custom pricing, bulk ordering, quote management, ERP integration, and customer portal functionality.
Shopify Plus B2BLiquidCustom AppsERP Integration
Senior Developer
MegaGrass - Custom Product Configurator
Advanced product configurator for artificial grass with real-time pricing, 3D preview, and custom measurement calculator.
ReactShopify APIsCanvas APICustom Calculator
Enterprise Developer
UltraHedges - Enterprise Store Setup
Shopify Plus setup for enterprise landscaping with multi-location inventory, custom shipping rules, and fulfillment center integrations.
Shopify PlusMulti-locationCustom ShippingFulfillment API
Open Source Repositories
A focused set of public GitHub projects that reflect my AI, Shopify, backend, and automation work.
Public Repository
BootstrapVue-opensource-contributed
Open-source BootstrapVue contribution repo centered on Vue 2 and Bootstrap v4 components, plugins, directives, and documentation.
JavaScriptVue 2BootstrapVue
View RepositoryPublic Repository
Nuxt-Firebase
Nuxt dashboard project wired with Firebase services and admin-style UI structure using the Nuxt Argon Dashboard stack.
NuxtVueFirebase
View RepositoryPublic Repository
Typescript_scraping_cheerio
TypeScript scraping project using Cheerio for HTML parsing and structured extraction workflows.
TypeScriptCheerioWeb Scraping
View RepositoryPublic Repository
React_Shoping-app
React shopping application bootstrapped with Create React App and structured for storefront-style product and cart flows.
ReactJavaScriptFirebase
View RepositoryClient Stories
Don't just take my word for it. Here's what people I've worked with have to say about the experience.
“Cyclone is an exceptional developer who consistently delivers high-quality work. His attention to detail and creativity are unmatched.”
SL
Sementha Lee
CEO @ Nexora Systems
“Working with Cyclone was a fantastic experience. He brought our vision to life with his technical expertise and innovative approach.”
RP
Reshmi Patel
Product Manager @ BlueCircuit Technologies
“Cyclone's ability to solve complex problems and deliver results on time is truly impressive. He is a valuable asset to any team.”
TS
Tilman Schmidt
CTO @ Altabyte Labs
Get in Touch
I'm always open to discussing new products, freelance opportunities, and AI-focused collaborations. If you're building something meaningful and need a strong engineering partner, feel free to reach out.