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[8BE] Senior Fullstack Engineer (.NET + React)

🕒 yesterday
C#.NET 8ASP.NET CoreReact
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📜 Description

  • Build and own Shopify storefront integrations, including Admin API, webhooks, and checkout integration points.
  • Develop React interfaces for administration and configuration.
  • Design and implement .NET 8 Web API endpoints and services.
  • Integrate third-party APIs using clean adapter layers and align API contracts with the storefront partner.
  • Implement event-driven messaging with SNS/SQS, including idempotency and retries, while keeping customer-facing flows resilient.
  • Write tests, document APIs and integration flows, and participate in code reviews, sprint ceremonies, and client technical sessions.

🛠️ Requirements

  • 5+ years of full-stack development with strong C# / .NET (ASP.NET Core, .NET 6+) and React (TypeScript)
  • Hands-on Shopify integration: Admin API (GraphQL/REST), webhooks, checkout integration
  • Solid REST API design with OpenAPI / Swagger
  • Third-party API integration: authentication, rate limits, retries, error handling
  • Working knowledge of AWS: Lambda, SQS/SNS, ECS
  • Clean architecture: dependency injection, DDD/CQRS concepts
  • Testing discipline across backend and frontend
  • Docker and CI/CD
  • Excellent written and spoken English for daily client interaction
  • Shipping or carrier API experience
Full job description

Company Description

Software Mind is a software engineering partner that builds and scales digital products for companies in the US and Europe. Our LATAM teams work directly with client engineering teams on complex, high-impact projects.

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

Qualifications

Must have:

  • 5+ years of full-stack development with strong C# / .NET (ASP.NET Core, .NET 6+) and React (TypeScript)
  • Hands-on Shopify integration: Admin API (GraphQL/REST), webhooks, checkout integration
  • Solid REST API design with OpenAPI / Swagger
  • Third-party API integration: authentication, rate limits, retries, error handling
  • Working knowledge of AWS: Lambda, SQS/SNS, ECS
  • Clean architecture: dependency injection, DDD/CQRS concepts
  • Testing discipline across backend and frontend
  • Docker and CI/CD
  • Excellent written and spoken English for daily client interaction

Nice to have:

  • Shipping or carrier API experience
  • Shopify Plus, Hydrogen, or headless commerce storefronts
  • Admin UIs built with component libraries (Polaris, MUI, or similar)
  • Retail, e-commerce, or promotional products domain knowledge

Additional Information

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