Sr. Marketplace Integration Developer

We are seeking a Senior Marketplace Integration Developer with strong expertise in PHP and .NET to join our team. This role focuses on connecting our custom eCommerce platform with leading global marketplaces such as Amazon, eBay, and Rakuten. The ideal candidate will have extensive experience in backend development, working with third-party APIs, and managing data synchronization across multi-channel retail environments. This is a hands-on position requiring the development and maintenance of seamless integrations that support product listings, inventory management, order processing, and fulfillment tracking.

Key Responsibilities

Marketplace API Integration:
Develop and maintain robust integrations between our eCommerce backend and marketplaces including Amazon (SP-API/MWS), eBay (Trading and REST APIs), and Rakuten APIs. Automate critical workflows such as product listings, inventory synchronization, order imports, price updates, and fulfillment tracking to ensure smooth and efficient operations.

Product and Catalog Management:
Design and implement modules to map and synchronize product data—such as titles, descriptions, images, SKUs, pricing, and stock levels—according to marketplace-specific requirements. Handle complex product structures including variants, bundles, and categories while addressing regional catalog variations.

Order & Fulfillment Integration:
Create services to capture marketplace orders in real-time and update order statuses including confirmed, shipped, and cancelled back to the marketplaces. Integrate tracking numbers and shipping labels to improve fulfillment accuracy and customer satisfaction.

Authentication & Token Management:
Implement secure OAuth and token-based authentication flows for platforms like Amazon and eBay. Manage API rate limits, token refresh mechanisms, and error handling to ensure continuous and reliable service.

Monitoring, Logging & Reporting:
Develop dashboards or logging systems to monitor integration health, track API errors, and oversee synchronization activities. Provide reporting tools that offer insights into listing performance, order statuses, and error resolution to support operational transparency.

Required Qualifications

- Bachelor’s degree in Computer Science, Information Systems, or a related field.
- 3 to 5+ years of hands-on experience with PHP frameworks (Laravel, CodeIgniter) and .NET technologies (C#, ASP.NET MVC/Core).
- Proven experience integrating eCommerce systems with Amazon SP-API/MWS, eBay APIs, or Rakuten API.
- Strong knowledge of RESTful API development, JSON/XML data handling, and background task scheduling (cron jobs, task schedulers).
- Experience with relational databases such as MySQL, SQL Server, or PostgreSQL.
- Solid understanding of eCommerce workflows including product lifecycle, inventory management, and order processing.

Preferred Qualifications and Benefits

- Familiarity with marketplace compliance standards, product feed validation, and taxonomy mapping.
- Experience supporting multi-region and multi-language eCommerce platforms.
- Exposure to ERP or Order Management Systems (OMS) is advantageous.
- Knowledge of Amazon FBA, eBay Promotions Manager, or Rakuten Partner Center is beneficial.
- Basic front-end skills with JavaScript frameworks like Vue.js or React are a plus.

Soft Skills:
Strong problem-solving and debugging capabilities, excellent written and verbal communication skills, self-motivation with the ability to work independently and collaboratively, and a detail-oriented, process-driven approach.

This is a full-time, in-person position offering a competitive salary range of Rs50,000 to Rs300,000 per month, depending on experience. Candidates must have at least 3 years of direct experience with eBay and Amazon integrations.