You will get WhatsApp OTP, 2FA & messaging integrated into your app or website
Project details
I'll integrate WhatsApp messaging or OTP/2FA into your web or mobile app cleanly, securely, and with real documentation. This is the same technology I designed, built, and now sell as a live SaaS product (wa.dynamicsoft.biz), so you're hiring someone who has shipped it in production, not just read the docs.
What I can build for you:
• OTP / 2FA login — generate, deliver and verify one-time codes, with expiry (TTL), attempt limits and single-use protection.
• Messaging — send text, receipts, invoices and PDF documents from your own WhatsApp number.
• Delivery webhooks for sent/delivered/read status, plus branded message templates.
I work with any backend Node.js, .NET, PHP or Python and deliver tested code, clear setup docs and a short handover. With 30 years of software engineering experience across ERP, fintech and logistics systems, I focus on reliability and security, not just making the call work once.
Tell me your use case and stack, and I'll recommend the cleanest approach before we start.
What I can build for you:
• OTP / 2FA login — generate, deliver and verify one-time codes, with expiry (TTL), attempt limits and single-use protection.
• Messaging — send text, receipts, invoices and PDF documents from your own WhatsApp number.
• Delivery webhooks for sent/delivered/read status, plus branded message templates.
I work with any backend Node.js, .NET, PHP or Python and deliver tested code, clear setup docs and a short handover. With 30 years of software engineering experience across ERP, fintech and logistics systems, I focus on reliability and security, not just making the call work once.
Tell me your use case and stack, and I'll recommend the cleanest approach before we start.
Programming Languages
JavaScript, TypeScript, C#Coding Expertise
Localization, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$199
|
Standard
$499
|
Advanced
$999
|
|---|---|---|---|
| Delivery Time | 4 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 2 |
Number of Pages | 1 | 1 | 1 |
Design Customization | - | - | |
Content Upload | - | - | - |
Responsive Design | - | ||
Source Code | - | - | - |
Optional add-ons
You can add these on the next page.
Extra backend / language integration
(+ 3 Days)
+$100
Branded message templates
(+ 2 Days)
+$60
Additional revision
(+ 1 Day)
+$40Frequently asked questions
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AA
Aamir A.
Apr 29, 2025
C#/.NET Developer Needed for Scalable App Development
I'd recommend Faisal for any .NET work, big or small, project doesn't matter. He possesses excellent skills in the domain and quickly understands the project requirements while asking the right questions to align for a timely and top-quality code delivery.
He is courteous and his professional behavior in this small project lifecycle was impressive. I would hire him again for future requirements for sure.
He is courteous and his professional behavior in this small project lifecycle was impressive. I would hire him again for future requirements for sure.
About Faisal
Senior .NET Developer | ERP, Logistics, POS & WhatsApp/OTP APIs
Karachi, Pakistan - 3:35 am local time
As the founder of Dynamic Software Solution, and with 30 years of software development experience, I've designed and delivered ERP, logistics, inventory, POS, accounting, and reporting systems using C#, ASP.NET Core, SQL Server, and Web APIs. My strongest skill is not simply writing code—it's understanding business processes and translating them into reliable, scalable software.
also build and operate my own production software products, including a WhatsApp Messaging API and a WhatsApp OTP/2FA API used by real businesses today
Core Expertise
✔ ERP, Trading & Commercial Management Systems
✔ POS & Retail Management Systems
✔ Logistics & Freight Forwarding Software
✔ Inventory, Warehouse & Distribution Management
✔ Accounting & Costing Applications
✔ SQL Server Database Architecture
✔ REST APIs & Backend Services
✔ WhatsApp Messaging & OTP / 2FA API Integration
✔ Reporting, PDF & Excel Automation
✔ Performance Optimization & Query Tuning
Selected Projects
▪ Logistics ERP with Freight Forwarding, Billing, Costing, and Double-Entry Accounting
▪ POS and Inventory Management Systems for Retail and Distribution Businesses
▪ Trading and Distribution Management Applications
▪ Multi-Level Credit Approval Workflow with Automated Notifications and Audit Tracking
▪ CRM, Sales, Customer Service, and Order Management Portals
▪ Financial, Operational, and Management Reporting Systems
▪ REST APIs and Third-Party Integrations
▪ WhatsApp Messaging & OTP APIs — live SaaS products for sending text & PDF documents and generating, delivering & verifying one-time passcodes (Node.js, REST + delivery webhooks)
▪ SQL Server Performance Tuning, Database Refactoring, and Query Optimization
How I Work
Successful business applications start with the right database design and business rules.
I begin with workflows, accounting logic, reporting requirements, and data architecture before writing code. This approach produces software that remains reliable, maintainable, and scalable as transaction volumes grow.
If you're looking for someone who can understand your business requirements, design the right database structure, and deliver a scalable solution from start to finish, I'd be happy to discuss your project.
Steps for completing your project
After purchasing the project, send requirements so Faisal can start the project.
Delivery time starts when Faisal receives requirements from you.
Faisal works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements & scope
Review your requirements and confirm the features, backend stack, WhatsApp provider and timeline before any code is written.
Setup & connection
Set up API credentials or your WhatsApp number and verify a working test connection to the WhatsApp API.