Backend Integration Developer

Employment Type: Full-Time

At Kwan Technology we connect top engineering talent across Latin America with innovative U.S.-based companies. Our teams build scalable software solutions across industries including logistics fintech cybersecurity healthcare and SaaS.

We are currently looking for a Backend Integration Developer to join one of our U.S. clients in the logistics and eCommerce industry. This is an exciting opportunity to work on large-scale integrations that support high-volume fulfillment operations and mission-critical business processes.

As a Backend Integration Developer you will design develop and maintain integrations between a Warehouse Management System (WMS) and multiple third-party platforms including CRM systems ERP solutions shipping carriers eCommerce platforms and custom applications.

This is a hands-on backend development role where youll collaborate with a distributed engineering team taking ownership of the integrations you build while helping ensure scalability reliability and performance.

• Design build and maintain backend integrations between a Warehouse Management System (WMS) and external platforms.
• Develop and maintain integrations with CRM systems ERP platforms carrier APIs eCommerce platforms and custom applications.
• Build RESTful APIs webhooks and data synchronization services.
• Develop data transformation and integration workflows.
• Implement and support EDI/B2B integration processes.
• Troubleshoot production integration issues and optimize system performance.
• Monitor data flows to ensure reliability and accuracy.
• Collaborate with product owners and engineering teams to deliver integration projects.
• Recommend improvements to architecture performance and development processes.

• 37 years of professional backend software development experience.
• Strong experience with PHP or Python.
• Proven experience building third-party integrations and consuming external APIs.
• Solid understanding of:
• • RESTful APIs
  • Webhooks
  • Authentication methods (OAuth API Keys JWT)
  • Data mapping and transformation
• Experience working with MySQL or other relational databases.
• Experience integrating eCommerce platforms such as Shopify or similar.
• Strong debugging and problem-solving skills.
• Professional English communication skills (written and spoken).
• Ability to collaborate effectively with remote international teams.

• Experience with Warehouse Management Systems (WMS).
• Experience with EDI standards and B2B integrations.
• Salesforce integration experience.
• Background in logistics supply chain or fulfillment systems.
• Experience with cloud platforms such as AWS Azure or Google Cloud Platform.
• Familiarity with message queues and event-driven architectures.
• Experience with CI/CD pipelines and deployment automation.

• PHP or Python
• REST APIs
• Webhooks
• MySQL
• API Integrations
• Shopify (or similar eCommerce platforms)
• EDI
• CRM & ERP Integrations
• Git
• Cloud Platforms (AWS Azure or GCP)

Were looking for a developer who enjoys solving integration challenges writing clean and maintainable code and taking ownership of their work.

The ideal candidate is proactive detail-oriented and comfortable working in a collaborative environment with international teams. You should be passionate about building reliable backend systems that support business-critical operations.