You will get a Custom Chrome Extension for Web Productivity and Data
Rising Talent
Project details
What sets this project apart:
Data Productivity: Expertise in structured data capture, web content annotation, and intelligent information management (based on my experience with specialized tools like PageMark).
Seamless Integration: I connect your browser tool to external databases (MongoDB/PostgreSQL) and custom APIs for real-time data synchronization.
Modern Architecture: Built with the latest Manifest V3 standards, ensuring your extension is future-proof, fast, and privacy-compliant.
Custom UI/UX: I design intuitive sidebars, context menus, and dashboard overlays that feel like a native part of the browser.
System Logic: Beyond simple scripts, I build complex extensions that handle authentication, cloud storage, and sophisticated business rules.
Whether you are building a proprietary tool for your team or a consumer-facing product, I provide the technical expertise to turn the browser into a high-powered workstation.
Data Productivity: Expertise in structured data capture, web content annotation, and intelligent information management (based on my experience with specialized tools like PageMark).
Seamless Integration: I connect your browser tool to external databases (MongoDB/PostgreSQL) and custom APIs for real-time data synchronization.
Modern Architecture: Built with the latest Manifest V3 standards, ensuring your extension is future-proof, fast, and privacy-compliant.
Custom UI/UX: I design intuitive sidebars, context menus, and dashboard overlays that feel like a native part of the browser.
System Logic: Beyond simple scripts, I build complex extensions that handle authentication, cloud storage, and sophisticated business rules.
Whether you are building a proprietary tool for your team or a consumer-facing product, I provide the technical expertise to turn the browser into a high-powered workstation.
Programming Languages
JavaScript, PythonWhat's included
| Service Tiers |
Starter
$99
|
Standard
$299
|
Advanced
$599
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 3 | 5 | Unlimited |
Number of Pages | 3 | 5 | 10 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
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KT
Kristian T.
Apr 28, 2026
Fix unstable map & marker clustering issue (Google Maps / WordPress)
I had a great experience working with this freelancer. He was fast, efficient, and very easy to work with throughout the entire process. Communication was clear and smooth from start to finish, and he understood the task perfectly without the need for repeated explanations.
He delivered exactly what was needed and handled everything in a professional and reliable way. I would definitely recommend him to others and would not hesitate to work with him again.
He delivered exactly what was needed and handled everything in a professional and reliable way. I would definitely recommend him to others and would not hesitate to work with him again.
About Yanjun
Full Stack Developer | WordPress Expert | Python, PHP & API Integratio
100%
Job Success
Guangzhou, China - 4:42 am local time
"My goal is not just to deliver code, but to ensure your system solves your business problem and drives growth."
I help founders and businesses turn ideas into functional products, fix technical bottlenecks quickly, and build automation that saves your team hours of manual work. I specialize in backend architecture and full-stack development — especially when you need a reliable partner to make things work.
💎 What I can deliver for you:
● Web & SaaS Development: Building scalable products from scratch using Python (FastAPI/Django), PHP (Laravel), and Vue.js.
● Mobile Apps & Mini-Programs: Cross-platform mobile development and professional WeChat Mini-Programs.
● Telegram Bot Development: Sophisticated bots for automated trading alerts, customer service, or community management.
● Chrome Extensions: Custom browser tools for web scraping, automation, and internal productivity.
● API & System Integration: Seamlessly connecting your database with third-party tools like Stripe, Google, or CRMs.
● WordPress Recovery: Deep debugging of performance issues, plugin conflicts, and "unfixable" site errors.
🛠️ Technical Expertise:
● Languages: Python, PHP, Golang, JavaScript, SQL
● Frameworks: FastAPI, Django, Laravel, Vue.js, WordPress
● Automations: Custom scripts, API workflows, and system optimization
● Systems: Linux server management, Cloud infrastructure (AWS/Vercel)
🤝 Why work with me:
● Results-First Mindset: I focus on getting your product to market fast (MVP approach) without over-engineering.
● Strong Debugging Skills: I enjoy the "detective work" of finding and fixing complex, broken, or unstable systems.
● Clear Communication: I explain technical issues in plain English and provide honest, practical advice.
I am currently building my presence on Upwork, so I offer high-quality work at a competitive rate. I am also happy to start with a small task or a test project to prove my value and reduce your risk.
📩 If you are stuck with a technical issue or ready to build your next big idea, send me a message — let's get it moving forward.
Steps for completing your project
After purchasing the project, send requirements so Yanjun can start the project.
Delivery time starts when Yanjun receives requirements from you.
Yanjun works on your project following the steps below.
Revisions may occur after the delivery date.
Technical Architecture & Permissions
I will define the Manifest V3 structure and map out the necessary browser permissions to ensure the extension is secure, privacy-compliant, and future-proof.
UI/UX & Content Script Development
Building the user interface (Popup or Sidebar) and developing the content scripts that interact with the target web pages' DOM structure.