Senior Software .NET Engineer (B2B)

Responsibilities As a Senior Software Engineer at Nexi Digital, you will drive the modernization of an established, business-critical payment platform — migrating a large ASP .NET (WebForms/MVC) monolith from .NET Framework 4.x to .NET 8, together with its database layer and system integrations, in an on-premise environment. You will combine deep .NET craftsmanship with modern, AI-assisted ways of working to make the migration faster and safer. Analyzing the legacy codebase and shaping an incremental, low-risk migration path (module by module, no big-bang rewrites) Designing and implementing the migration of application components from .NET Framework 4.x / ASP .NET(WebForms, MVC) to .NET 8 / ASP .NET Core Refactoring the code towards SOLID principles and clean architecture as part of the migration, not as a separate project Modernizing the Microsoft SQL Server data layer and the platform's integrations with surrounding systems Using AI-assisted development tools (e.g.

GitHub Copilot and LLM-based tooling) to accelerate legacy code analysis, refactoring and test generation — and helping the team adopt these practices responsibly Building the automated test coverage (unit, integration) that makes the migration verifiable at every step Collaborating closely with the development teams and stakeholders on scope, sequencing and technical decisions Mentoring less experienced developers and sharing modernization know-how across the team

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