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

Posted Yesterday
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Hiring Remotely in San Jose, CRI
Remote
Senior level
Software
The Role
Build and own Shopify storefront integrations and React administrative interfaces for a shipping and delivery service. Develop .NET 8 APIs and microservices, integrate third-party carrier APIs, implement event-driven AWS messaging, and ensure resilient customer-facing flows. The role includes API contract alignment, automated testing, OpenAPI documentation, code reviews, sprint ceremonies, and direct collaboration with client engineering teams.
Summary Generated by Built In
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

Skills Required

  • 5+ years of full-stack development experience
  • Strong C# and .NET experience, including ASP.NET Core and .NET 6+
  • React and TypeScript experience
  • Hands-on Shopify integration experience, including Admin API, GraphQL or REST, webhooks, and checkout integration
  • REST API design using OpenAPI or Swagger
  • Third-party API integration experience, 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
  • Docker and CI/CD experience
  • Excellent written and spoken English for daily client interaction
  • Shipping or carrier API experience
  • Shopify Plus, Hydrogen, or headless commerce storefront experience
  • Experience building admin UIs with Polaris, MUI, or similar component libraries
  • Retail, e-commerce, or promotional products domain knowledge

Software Mind Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Software Mind and has not been reviewed or approved by Software Mind.

  • Fair & Transparent Compensation — Pay is considered competitive for core hiring markets, with “good salary” cited in multiple locales. Public salary snapshots provide a baseline that helps candidates assess offers and negotiations.
  • Flexible Benefits — Remote or hybrid options are prominently highlighted, and a remote‑work program is publicly noted alongside positively cited work‑from‑home experiences. Flexibility around schedules and location is presented as part of the package.
  • Wellbeing & Lifestyle Benefits — Private medical care, language classes, sports/fitness support, and learning initiatives are listed for several Central/Eastern European locations, with occasional workation perks promoted. These lifestyle‑oriented offerings complement base pay and can enhance perceived total rewards.

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The Company
HQ: Kraków
1,000 Employees
Year Founded: 1999

What We Do

Software Mind is a global digital transformation partner with operations throughout Europe, the US and LATAM. Driven by tech and empowered by people, we provide companies with software engineers and autonomous, cross-functional development teams who manage software life cycles from ideation to release and beyond. For over 20 years we’ve been enriching organizations with the talent they need to boost scalability, drive dynamic growth and bring disruptive ideas to life. Our top-notch engineering teams combine ownership with leading technologies, including cloud, AI, data science and embedded software to accelerate digital transformations and boost software delivery. A culture, driven by trust, that embraces openness, craves more and acts with respect enables our experts to create evolutive solutions that support scale-ups, unicorns and enterprise-level companies around the world.

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