[8BE] Senior Fullstack Engineer (.NET + React)
Software Mind1 day ago
Remote, Americas or San José, Costa RicaSenior
Responsibilities
- Build and own Shopify storefront integrations using the Admin API, webhooks, and checkout integration points.
- Develop React interfaces for administration and configuration tools.
- Design and implement .NET 8 Web API endpoints and services.
- Integrate third-party APIs with authentication, rate-limit handling, retries, and error handling behind clean adapter layers.
- Implement event-driven messaging with SNS/SQS, including idempotency and retries.
- Keep customer-facing flows fast and resilient and align API contracts with the storefront partner.
- Write unit, integration, and component tests.
- Document APIs and integration flows and participate in code reviews, sprint ceremonies, and client technical sessions.
Requirements
- 5+ years of full-stack development experience.
- Strong C# and .NET experience, including ASP.NET Core and .NET 6+.
- Strong React and TypeScript experience.
- Hands-on Shopify integration experience with the Admin API, GraphQL or REST, webhooks, and checkout integration.
- Experience designing REST APIs with OpenAPI or Swagger.
- Experience integrating third-party APIs, including authentication, rate limits, retries, and error handling.
- Working knowledge of AWS Lambda, SQS/SNS, and ECS.
- Knowledge of clean architecture, dependency injection, and DDD/CQRS concepts.
- Testing experience across backend and frontend codebases.
- Experience with Docker and CI/CD.
- Excellent written and spoken English for daily client interaction.
- Shipping or carrier API experience is preferred.
- Shopify Plus, Hydrogen, or headless commerce experience is preferred.
- Experience building admin UIs with Polaris, MUI, or similar component libraries is preferred.
- Retail, e-commerce, or promotional products domain knowledge is preferred.
Benefits
- Short, focused engagement with a discovery phase followed by two-week sprints through production release.
- Direct collaboration with client engineering teams on a complex, high-impact project.
- LATAM team members work directly with client engineering teams in the US and Europe.
Tech Stack
Categories
About Software Mind
Software Mind provides outsourced software engineering and autonomous, cross-functional development teams to startups through enterprises, delivering custom applications, cloud, AI, data and embedded solutions. The privately held company, headquartered in Krakow, operates across Europe, the US and LATAM, supporting full software lifecycles from ideation to maintenance. It offers nearshore/offshore engagement models and received private equity investment in 2020.