[8BE] Senior Fullstack Engineer (.NET + React)
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Job Description
We’re partnering with a leading US promotional products and e-commerce company to build a new shipping and delivery service for its white-label B2B commerce platform. The platform runs on Shopify Plus with a .NET microservices backend on AWS. The new service connects major shipping carriers, the storefront, and the existing order management systems. It’s a short, focused engagement: a discovery phase, then two-week sprints through production release.
What you’ll do:
• Build and own the Shopify storefront integration (Admin API, webhooks, checkout integration points)
• Develop React interfaces, including admin and configuration tools
• Design and implement .NET 8 Web API endpoints and services
• Integrate third-party APIs behind clean adapter layers
• Work with event-driven messaging (SNS/SQS), including idempotent handling and retries
• Keep customer-facing flows fast and resilient
• Align API contracts with the client’s storefront partner
• Write unit, integration, and component tests
• Document APIs (OpenAPI) and integration flows in Confluence
• Take part in code reviews, sprint ceremonies, and technical sessions with the client
Requirements
Department: Software Development
Function: Information Technology
Experience Level: Not Applicable