Rijul J.
API Integration | ERP, CRM, WApp API, QuickBooks, Stripe & Middleware
𝐀𝐏𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 | 𝐄𝐑𝐏 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 | 𝐌𝐢𝐝𝐝𝐥𝐞𝐰𝐚𝐫𝐞 | 𝐂𝐑𝐌 | 𝐐𝐮𝐢𝐜𝐤𝐁𝐨𝐨𝐤𝐬 | 𝐒𝐭𝐫𝐢𝐩𝐞 | 𝐖𝐡𝐚𝐭𝐬𝐀𝐩𝐩 𝐀𝐏𝐈 I help businesses connect different software systems through API integration, ERP integration, CRM integration, and custom middleware development. From automating business workflows to synchronizing data between applications, I build reliable integrations that reduce manual work and keep business systems connected. Whether you need to connect Odoo, ERPNext, Shopify, QuickBooks Online, Stripe, Xero, WhatsApp Business API, or a custom SaaS application, I can help you build a secure and scalable integration tailored to your business requirements. ➞ 𝐀𝐏𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐂𝐮𝐬𝐭𝐨𝐦 𝐀𝐏𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 • REST API and GraphQL API integration • Third-party API integration and custom API development • Webhooks, OAuth 2.0, and API authentication • Real-time and scheduled data synchronization • API automation, error handling, and retry mechanisms ➞ 𝐄𝐑𝐏 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐒𝐲𝐬𝐭𝐞𝐦 𝐂𝐨𝐧𝐧𝐞𝐜𝐭𝐢𝐯𝐢𝐭𝐲 • Odoo and ERPNext integration • ERP and CRM integration • ERP and eCommerce integration • ERP and accounting software integration • Inventory, order, customer, and invoice synchronization • Custom business workflow automation ➞ 𝐌𝐢𝐝𝐝𝐥𝐞𝐰𝐚𝐫𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 • Custom middleware and integration services • Data mapping, transformation, and validation • API orchestration and aggregation • Queue-based and background processing • Integration logging, monitoring, and failure recovery • Scalable architecture for multi-system integrations ➞ 𝐐𝐮𝐢𝐜𝐤𝐁𝐨𝐨𝐤𝐬, 𝐒𝐭𝐫𝐢𝐩𝐞 & 𝐏𝐚𝐲𝐦𝐞𝐧𝐭 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 • QuickBooks Online (QBO) API integration • Xero accounting integration • Stripe and PayPal payment integration • Payment gateway and webhook integration • Subscription billing and checkout workflows • Invoice, payment, and transaction synchronization ➞ 𝐖𝐡𝐚𝐭𝐬𝐀𝐩𝐩 𝐀𝐏𝐈 & 𝐂𝐑𝐌 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 • WhatsApp Business API integration • Automated notifications and messaging workflows • WhatsApp and CRM integration • WhatsApp and ERP integration • Customer communication and status updates • Webhook-based message and event processing ➞ 𝐞𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 & 𝐒𝐚𝐚𝐒 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 • Shopify API integration • CRM and customer data synchronization • Freshdesk, Slack, Airtable, and Webflow integrations • Custom SaaS application integration • Cross-platform data synchronization and automation ➞ 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐒𝐭𝐚𝐜𝐤 Node.js | Python | PHP | Java | .NET | REST APIs | GraphQL | PostgreSQL | MySQL | MongoDB | SQL Server | AWS | Azure | Google Cloud ➞ 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞? • 14+ years of software engineering experience • Expertise in API integration and third-party integrations • Experience with ERP, CRM, accounting, payment, and eCommerce systems • Focus on secure data exchange and reliable synchronization • Maintainable middleware and integration architecture • Clear communication, structured implementation, and dependable delivery ➞ 𝐋𝐞𝐭'𝐬 𝐂𝐨𝐧𝐧𝐞𝐜𝐭 𝐘𝐨𝐮𝐫 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 Need an API integration developer to connect your ERP, CRM, QuickBooks, Stripe, WhatsApp, or eCommerce platform? Share the systems you use, the data you need to synchronize, and the workflow you want to automate. I can help identify the right integration approach for your business.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $2.5k
Billed in all: $217,861$218k
$840 in the last 6 months
Across 35 contracts
Earnings, last 30 days
Skill rankings: Top 17% in RESTful API
Ranked by MRR among everyone on Upwork with the skill.
- #6Oracle Fusion Middleware26 freelancers · 🇮🇳 #1Top 23%🇮🇳#1 of 8
- #51PayPal Integration301 freelancers · 🇮🇳 #24Top 17%🇮🇳#24 of 136
- #59QuickBooks Online API203 freelancers · 🇮🇳 #10Top 29%🇮🇳#10 of 41
- #79OAuth381 freelancers · 🇮🇳 #24Top 21%🇮🇳#24 of 112
- #112WhatsApp472 freelancers · 🇮🇳 #19Top 24%🇮🇳#19 of 94
- #114Third-Party Integration415 freelancers · 🇮🇳 #35Top 27%🇮🇳#35 of 142
- #267Odoo1,044 freelancers · 🇮🇳 #59Top 26%🇮🇳#59 of 248
- #503Payment Gateway Integration2,302 freelancers · 🇮🇳 #217Top 22%🇮🇳#217 of 972