You will get API Developer | Payment API Integration | Workflow Automation
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Project details
š Need secure API integrations and automated workflows for your application? You're in the right place!
I provide custom API development, payment gateway integration, and workflow automation to help your business save time, reduce manual work, and connect your favorite platforms seamlessly.
Whether you're building a new application or enhancing an existing one, I create reliable, scalable, and well structured API solutions tailored to your business needs.
š¼ Services I Offer:
ā Custom REST API Development
ā Payment Gateway Integration (Stripe, PayPal, Razorpay, Square, Authorize.Net & more)
ā Third-Party API Integration
ā CRM & ERP Integrations
ā OAuth & Secure Authentication
ā Workflow & Business Process Automation
ā API Testing, Debugging & Performance Optimization
ā API Documentation & Maintenance
Whether you need to integrate payment systems, automate business processes, connect multiple applications, or develop a custom API from scratch, I'll deliver a solution that is secure, efficient, and built for long-term reliability.
š¬ Let's discuss your project and build an API solution that streamlines your workflow and supports your business growth!
I provide custom API development, payment gateway integration, and workflow automation to help your business save time, reduce manual work, and connect your favorite platforms seamlessly.
Whether you're building a new application or enhancing an existing one, I create reliable, scalable, and well structured API solutions tailored to your business needs.
š¼ Services I Offer:
ā Custom REST API Development
ā Payment Gateway Integration (Stripe, PayPal, Razorpay, Square, Authorize.Net & more)
ā Third-Party API Integration
ā CRM & ERP Integrations
ā OAuth & Secure Authentication
ā Workflow & Business Process Automation
ā API Testing, Debugging & Performance Optimization
ā API Documentation & Maintenance
Whether you need to integrate payment systems, automate business processes, connect multiple applications, or develop a custom API from scratch, I'll deliver a solution that is secure, efficient, and built for long-term reliability.
š¬ Let's discuss your project and build an API solution that streamlines your workflow and supports your business growth!
Programming Languages
HTML & CSS, JavaScript, PythonCoding Expertise
Cross Browser & Device Compatibility, PSD to HTML, SecurityWhat's included
| Service Tiers |
Starter
$120
|
Standard
$350
|
Advanced
$800
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 1 | 3 |
Number of Pages | 3 | 5 | 7 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
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JQ
Joe Q.
Feb 12, 2026
React and node work
TK
Tim K.
Jul 11, 2023
Front End Developer
TB
Travis B.
Apr 18, 2022
Seeking a Flutter Engineer to create Android App Widget for Home Screen
AS
Alfredo S.
Mar 1, 2022
IOS AND Android App DEveloper
great work. everytime again.
JP
John P.
Oct 22, 2021
Hybrid App Development
Harsh was incredibly good to work with. Very knowledgeable, on time, and just excellent work. We will definitely continue to use him in the future
About Harsh
API Integration Expert | System Architect | Custom API | Automation
100%
Job Success
Kharar, IndiaĀ - 7:24 pm local time
When business applications need to exchange data efficiently, a simple API connection is often not enough. We design and develop reliable, production-ready API integrations that connect ERP, CRM, eCommerce platforms, and internal business systems with a strong focus on performance, security, and long-term maintainability.
Rather than building quick fixes or temporary automation, we create integration solutions that support critical business operations and scale as your business grows.
## Our Services
š¹ API Integration & System Connectivity
Build secure and scalable integrations between ERP, CRM, eCommerce, finance, marketing, and internal systems using REST APIs, Webhooks, OAuth, and other modern integration technologies.
š¹ Integration Architecture
Design integration frameworks that include synchronization strategies, monitoring, retry mechanisms, logging, validation, and error handling to ensure reliable data exchange.
š¹ Custom Integration Platforms
Develop centralized API integration platforms using Laravel and PHP, giving your team complete control over scheduling, monitoring, logging, and integration management within your own infrastructure.
š¹ API Development & Technical Consulting
Provide end-to-end API services including REST API development, webhook implementation, OAuth authentication, system architecture, integration consulting, and technical audits.
š¹ Data Synchronization
Build dependable data synchronization pipelines between ERP, CRM, accounting, analytics, and internal applications with validation, monitoring, and automated recovery processes.
āļø Our Expertise
ā API integrations for complex business workflows across finance, eCommerce, logistics, operations, and marketing
ā Secure and scalable integration architecture with built-in logging, monitoring, retries, and alerting
ā On-premise and cloud-based integration solutions designed for long-term reliability
ā Complete project ownershipāfrom architecture and development to deployment, maintenance, and ongoing support
## Technology Stack
**Languages & Frameworks:** Laravel, PHP, Node.js, Python
**Integration Technologies:** REST APIs, Webhooks, OAuth, Event-Driven Integrations
**Platforms & APIs:** HubSpot, QuickBooks Online, Xero, Shopify, Acumatica, BigCommerce, Airtable, Slack, Notion, Google Workspace
**Infrastructure:** AWS, DigitalOcean, Docker, Linux
Why Clients Work With Us
š¼ Proven experience delivering enterprise-grade API integration solutions
š¤ Transparent communication, realistic timelines, and responsive support
š Flexible engagement for standalone API integrations, system modernization, and long-term integration platforms
Whether you need a custom API, multi-system integration, or a complete integration architecture, we build secure, scalable, and production-ready solutions that keep your business systems connected.
**Keywords:** API Integration, API Developer, Custom API Development, REST API, REST API Integration, Third-Party API Integration, Integration Architecture, System Integration, Enterprise Integration, Backend Development, Webhook Integration, OAuth Authentication, API Automation, Workflow Automation, Data Synchronization, Real-Time Data Sync, ERP Integration, CRM Integration, eCommerce Integration, Shopify API, WooCommerce API, HubSpot API, QuickBooks API, Xero API, BigCommerce API, Airtable API, Slack API, Notion API, Google Workspace API, Laravel, PHP, Node.js, Python, MySQL, PostgreSQL, GraphQL, Docker, AWS, DigitalOcean, Linux, API Testing, API Debugging, API Consulting, Production-Ready APIs, Scalable API Solutions, Secure API Integration, Cloud Integration, On-Premise Integration, System Architecture, Monitoring, Logging, Error Handling, Retry Logic.
Steps for completing your project
After purchasing the project, send requirements so Harsh can start the project.
Delivery time starts when Harsh receives requirements from you.
Harsh works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Analysis
Understand your business goals, API requirements, and integration workflow before development begins.
API Development & Integration
Develop or integrate the required APIs, payment gateways, and third party services with secure implementation.