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Senior Back-End Engineer (.NET)

Backend Developer • Senior • Remote • Vollzeit • Portugal Portugal

Senior .NET Backend Engineer role at Newfire Global Partners, modernizing a luxury retail client's e-commerce platform and enterprise systems. Uses a Microsoft Azure stack (.NET, SQL Server, Azure) and AI-native development tools (Claude Code, CodeRabbit).

Responsibilities

  • ▹Design and build integrations between the ERP, internal applications and third-party vendor systems (SFTP, APIs, message queues)
  • ▹Develop and maintain .NET applications and services across the Azure estate
  • ▹Diagnose and resolve SQL Server performance problems in production (deadlocks, timeouts, slow queries)
  • ▹Build and maintain Azure Logic Apps, App Services and Azure SQL workloads
  • ▹Onboard new vendors onto the integration platform
  • ▹Engineer scheduled and batch jobs to production-grade reliability (failure handling, monitoring, atomicity)
  • ▹Consolidate duplicated logic and retire legacy code
  • ▹Translate business workflows (finance, inventory, order management) into reliable technical solutions
  • ▹Establish tests and documentation for owned surfaces
  • ▹Participate in code reviews and pod ceremonies
  • ▹Triage and resolve production incidents

Requirements

  • ▹7+ years of backend engineering experience with strong C#/.NET, including .NET Framework
  • ▹Experience resolving SQL Server performance problems in production
  • ▹Experience with the Microsoft Azure stack (Logic Apps, App Services, Azure SQL)
  • ▹Integration experience with SFTP, APIs and message queues
  • ▹Legal work authorization in the country of residence

Soft skills

Structured, independent work on a legacy codebaseActive participation in hiring interviewsCollaboration in code reviews and pod ceremonies

About the company

Newfire Global Partners is a technology firm present across four continents, building digital healthcare, AI-driven analytics and enterprise technology solutions for Fortune 500 companies and startups.

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