Senior Backend Engineer (.NET)

Stack

Responsibilities

• ▹Design and build integrations between the ERP, internal applications and third-party vendor systems over SFTP, APIs and 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) and harden schema and indexing
• ▹Build and maintain Azure Logic Apps, App Services and Azure SQL workloads
• ▹Onboard new vendors onto the integration platform as a continuous stream of work
• ▹Engineer scheduled and batch jobs to production-grade reliability: failure handling, monitoring, atomicity
• ▹Bring structure to a legacy codebase: consolidate duplicated logic and retire what can be retired
• ▹Translate business workflows (finance, inventory, order management) into reliable technical solutions
• ▹Establish tests and documentation for the surfaces you own
• ▹Participate in code reviews and pod ceremonies
• ▹Triage and resolve production incidents across the enterprise systems estate
• ▹Serve on interview panels for future hiring

Requirements

• ▹7+ years of backend engineering with strong C# / .NET, including .NET Framework
• ▹Deep Azure development experience: Logic Apps, App Services, Azure SQL and surrounding PaaS services, from a developer and DevOps perspective
• ▹Strong T-SQL and SQL Server fundamentals with performance and reliability depth: query and index optimization, execution plan analysis, deadlock and timeout diagnosis, blocking and concurrency
• ▹Enterprise integration breadth: flat-file exchange over SFTP, REST and SOAP API integrations, message-queue-based integration
• ▹Experience integrating with third-party vendor systems where the other side dictates the contract
• ▹Full ownership of what you ship, testing included
• ▹The habit of documenting integration contracts, data flows and decisions
• ▹Fluency with AI-assisted development workflows
• ▹Comfort improving live systems in production, including legacy code you did not write
• ▹Proactive communication and familiarity with Agile/Scrum
• ▹Excellent spoken and written English
• ▹Significant US Eastern Time overlap
• ▹Documentation verifying legal work authorization in the country of residence

Soft skills

About the company

Newfire Global Partners is a leading technology firm building transformative software solutions for innovative companies, present across four continents with deep expertise in digital healthcare, AI-driven analytics and enterprise technology. The client is a well-established luxury retail company undergoing a major technology transformation.