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Full-Stack Developer (Next.js, Node.js, API Integration) for Secure Billing System
Upwork • , US • Remote
Posted on: 17th February, 2025
Employment Type: CONTRACTOR
Job Description
🚀 Project Overview:
We are building a secure, automated billing system for an organizational accommodation facility. The goal is to eliminate manual processes, reduce errors, and ensure seamless payments via OneLink OneBill API and WhatsApp Cloud API.
🔹 Technology Stack:
Frontend: Next.js (React.js, Tailwind CSS)
Backend: Node.js (Express.js)
Database: MySQL
APIs:
WhatsApp Cloud API (one-way messaging- individual bill templates in pdf form will be sent to each member through WhatsApp, about 450 members in total)
OneLink OneBill API (payment gateway for automatic payments and real-time payment tracking)
Email API (for invoice delivery)
Server Deployment:
VPS or on-premise Dedicated Server Machine in that organization's server room
Nginx, MySQL hosting, SSL setup
Secure API management
🔹 Key Features:
✅ Members receive bills via WhatsApp and Email
✅ Members can pay directly via OneLink OneBill integration
✅ Real-time dashboard in front of administrators for tracking payments of the members
✅ Data security & compliance very imp (no sensitive personal details to be stored)
🔍 What We Are Looking For:
We need an experienced full-stack developer for web application development API integration, and a server specialist for deployment and security setup. If you are skilled in both areas, you can apply for both roles.
Full-Stack Developer (Frontend & Backend)
✔️ Develop & deploy web app using Next.js (React.js) + Node.js (Express.js)
✔️ Set up MySQL database with proper schema
✔️ Handle API integrations (WhatsApp Cloud API, OneLink OneBil APl, Email)
✔️ API keys stored in secure environment variables (not hardcoded)
✔️ Implement data visualization (charts, graphs, analytics dashboard)
✔️ Ensure security best practices (API authentication, environment variables, HTTPS)
✔️ Provide an admin panel for managing user roles and system settings.
✔️ Use a modular code structure for easy scalability.
Server Specialist (VPS Deployment & Security)
✔️ Setup VPS or on-premise Dedicated Server Machine (Linux) with proper security measures
✔️ Deploy web app & manage SSL/ TLS encryption, HTTPS security, database optimization
✔️ Ensure secure API communication (OAuth 2.0, API keys, firewalls, backups)
✔️ Install SSL, firewall, security measures
✔️ VPS for external API communications
✔️ Optimize database & backups
✔️ Server-side security implementation
🛠 Deliverables:
📌 Fully functional web application with all API integrations
📌 Secure server deployment with SSL & security best practices
📌 Admin dashboard with real-time payment tracking
📌 Documentation for future server setup & maintenance SOPs
Who should apply?
📌Apply if you can do one or both roles (mention in your proposal).
📌Prior experience in API integrations, secure deployments, and automation projects is a plus!
We are building a secure, automated billing system for an organizational accommodation facility. The goal is to eliminate manual processes, reduce errors, and ensure seamless payments via OneLink OneBill API and WhatsApp Cloud API.
🔹 Technology Stack:
Frontend: Next.js (React.js, Tailwind CSS)
Backend: Node.js (Express.js)
Database: MySQL
APIs:
WhatsApp Cloud API (one-way messaging- individual bill templates in pdf form will be sent to each member through WhatsApp, about 450 members in total)
OneLink OneBill API (payment gateway for automatic payments and real-time payment tracking)
Email API (for invoice delivery)
Server Deployment:
VPS or on-premise Dedicated Server Machine in that organization's server room
Nginx, MySQL hosting, SSL setup
Secure API management
🔹 Key Features:
✅ Members receive bills via WhatsApp and Email
✅ Members can pay directly via OneLink OneBill integration
✅ Real-time dashboard in front of administrators for tracking payments of the members
✅ Data security & compliance very imp (no sensitive personal details to be stored)
🔍 What We Are Looking For:
We need an experienced full-stack developer for web application development API integration, and a server specialist for deployment and security setup. If you are skilled in both areas, you can apply for both roles.
Full-Stack Developer (Frontend & Backend)
✔️ Develop & deploy web app using Next.js (React.js) + Node.js (Express.js)
✔️ Set up MySQL database with proper schema
✔️ Handle API integrations (WhatsApp Cloud API, OneLink OneBil APl, Email)
✔️ API keys stored in secure environment variables (not hardcoded)
✔️ Implement data visualization (charts, graphs, analytics dashboard)
✔️ Ensure security best practices (API authentication, environment variables, HTTPS)
✔️ Provide an admin panel for managing user roles and system settings.
✔️ Use a modular code structure for easy scalability.
Server Specialist (VPS Deployment & Security)
✔️ Setup VPS or on-premise Dedicated Server Machine (Linux) with proper security measures
✔️ Deploy web app & manage SSL/ TLS encryption, HTTPS security, database optimization
✔️ Ensure secure API communication (OAuth 2.0, API keys, firewalls, backups)
✔️ Install SSL, firewall, security measures
✔️ VPS for external API communications
✔️ Optimize database & backups
✔️ Server-side security implementation
🛠 Deliverables:
📌 Fully functional web application with all API integrations
📌 Secure server deployment with SSL & security best practices
📌 Admin dashboard with real-time payment tracking
📌 Documentation for future server setup & maintenance SOPs
Who should apply?
📌Apply if you can do one or both roles (mention in your proposal).
📌Prior experience in API integrations, secure deployments, and automation projects is a plus!
Responsibilities
- The goal is to eliminate manual processes, reduce errors, and ensure seamless payments via OneLink OneBill API and WhatsApp Cloud API
- WhatsApp Cloud API (one-way messaging- individual bill templates in pdf form will be sent to each member through WhatsApp, about 450 members in total)
- OneLink OneBill API (payment gateway for automatic payments and real-time payment tracking)
- Email API (for invoice delivery)
- VPS or on-premise Dedicated Server Machine in that organization's server room
- ✔️ Implement data visualization (charts, graphs, analytics dashboard)
- ✔️ Ensure security best practices (API authentication, environment variables, HTTPS)
- ✔️ Provide an admin panel for managing user roles and system settings
- ✔️ Use a modular code structure for easy scalability
- 📌 Fully functional web application with all API integrations
- 📌 Admin dashboard with real-time payment tracking
- 📌 Documentation for future server setup & maintenance SOPs
Requirements
- Secure API management
- We need an experienced full-stack developer for web application development API integration, and a server specialist for deployment and security setup
- If you are skilled in both areas, you can apply for both roles
- Full-Stack Developer (Frontend & Backend)
- ✔️ Develop & deploy web app using Next.js (React.js) + Node.js (Express.js)
- ✔️ Set up MySQL database with proper schema
- ✔️ Handle API integrations (WhatsApp Cloud API, OneLink OneBil APl, Email)
- Server Specialist (VPS Deployment & Security)
- ✔️ Setup VPS or on-premise Dedicated Server Machine (Linux) with proper security measures
- ✔️ Deploy web app & manage SSL/ TLS encryption, HTTPS security, database optimization
- 📌 Secure server deployment with SSL & security best practices
Upwork
Technology
Job Type
CONTRACTOR
Benefits
- ✅ Members can pay directly via OneLink OneBill integration
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