You will get Custom API Integration Developer - REST Webhooks CRM & System Connector
Project details
Systems that do not talk to each other — manual exports, broken syncs, and duplicate data costing you time?
You get a custom API integration — REST connections, webhooks, and secure system sync built as production-ready code you own.
REST & webhooks · CRM & system connector · Fixed price with full source code
WHAT YOU GET
• REST API integration between your apps, store, CRM, or backend
• Webhook setup for real-time data flow and automated triggers
• Secure auth — OAuth, API keys, and token handling where needed
• Error handling, logging, and tested sync before go-live
• Integration documentation and staging tests
• Full source code and handoff notes
PACKAGES
Starter — connect one system via REST API or webhook (6 days)
Standard — integrate up to 3 systems with sync and error handling (11 days)
Advanced — full connector platform with OAuth, monitoring and docs (16 days)
WHY WORK WITH ME
I integrate systems as a full-stack developer — not one-off scripts that break on update. Clear scope, secure connections, and code your team can maintain.
Share your systems and data flow. I will confirm the right package before we start.
You get a custom API integration — REST connections, webhooks, and secure system sync built as production-ready code you own.
REST & webhooks · CRM & system connector · Fixed price with full source code
WHAT YOU GET
• REST API integration between your apps, store, CRM, or backend
• Webhook setup for real-time data flow and automated triggers
• Secure auth — OAuth, API keys, and token handling where needed
• Error handling, logging, and tested sync before go-live
• Integration documentation and staging tests
• Full source code and handoff notes
PACKAGES
Starter — connect one system via REST API or webhook (6 days)
Standard — integrate up to 3 systems with sync and error handling (11 days)
Advanced — full connector platform with OAuth, monitoring and docs (16 days)
WHY WORK WITH ME
I integrate systems as a full-stack developer — not one-off scripts that break on update. Clear scope, secure connections, and code your team can maintain.
Share your systems and data flow. I will confirm the right package before we start.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$179
|
Standard
$489
|
Advanced
$899
|
|---|---|---|---|
| Delivery Time | 6 days | 11 days | 16 days |
Number of Revisions | 2 | 3 | 3 |
Number of Pages | 1 | 3 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | ||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$59 - $119
Additional Revision
+$39
Additional Page
(+ 2 Days)
+$59
Extra API Integration
(+ 3 Days)
+$149
Webhook Setup Pack
(+ 2 Days)
+$99
OAuth & Auth Integration
(+ 2 Days)
+$129Frequently asked questions
About Moundir
I build end to end - websites, stores & business software
Constantine, Algeria - 8:05 pm local time
Next.js · React · TypeScript · Node.js · MongoDB · REST APIs · Webhooks · Custom CMS · Business websites
WHAT I DELIVER
• Business websites with custom CMS — Next.js, React, TypeScript, SEO-ready, client-editable content
• Production web apps and admin dashboards — scalable front-end architecture
• ERP workflows, inventory, invoicing, and finance modules for growing businesses
• SaaS and multi-tenant platforms — MVP through production scale
• E-commerce stores with payments, inventory, and admin panels
• API integrations — REST, webhooks, CRM and system connectors
• Website fix, rebuild, redesign, and performance optimization
• AI chatbots with RAG and website integration for business support
WHAT I HAVE BUILT
• SITERP — Global ERP with inventory, workflows, and reporting for business operations
• Production web apps and admin dashboards — React, Next.js, TypeScript
• Business websites with custom CMS so clients update content without a developer
• E-commerce and multilingual sites — English, French, Arabic where required
• Real-time features — live sync, dashboards, and WebSocket-based updates
• API connections between apps, stores, CRMs, and backends
• 30+ websites and software systems delivered off-platform and in production
HOW I WORK
You share your goal, systems, and timeline. I confirm scope before work starts, deliver on staging for your review, include source code and documentation, and keep you updated at each milestone — fixed-price packages or long-term partnership.
GOOD FIT IF YOU NEED
• A business website that looks professional and runs on modern code — not a template that breaks in 6 months
• Business systems that last — not scripts that break on the next update
• Clear milestones, source code included, and a developer who communicates in English, Arabic, or French
NOT THE RIGHT FIT IF
• You need a $50 quick fix with no scope or requirements
• You want work started before a funded contract is active on Upwork
Browse my Project Catalog for fixed-price packages — business websites, CMS, web apps, ERP, SaaS, e-commerce, invoicing, finance, AI chatbot, API integration, and website rebuild.
Send your project details. I will confirm the right package and approach before we start.
Steps for completing your project
After purchasing the project, send requirements so Moundir can start the project.
Delivery time starts when Moundir receives requirements from you.
Moundir works on your project following the steps below.
Revisions may occur after the delivery date.
Purchase & requirements
You choose your package, complete checkout, and submit your systems, API access, and data flow details through the requirements form.
Scope & integration plan
I review your apps and endpoints, confirm REST or webhook scope, and send a short integration plan before work starts.