Senior .NET Engineer — AI-Driven, Scalable FinTech

Moody; Brussel Hoofdstad; On-site; EUR 90,000 - 130,000; Full time

Job summary

Moody's is seeking a Senior Software Engineer (C# / .NET) to join the Orbis platform within Moody's Analytics. You will own end-to-end development across .NET Framework and .NET 10, optimize performance, and design scalable software architectures.

Collaborate with product, design, and data teams to deliver AI‑powered, reliable solutions for financial data platforms. You will mentor engineers, participate in code reviews, and contribute to modernization efforts while handling sensitive financial

Qualifications

• 5+ years delivering production-grade software in full-stack environments.
• Expert-level C# with ASP.NET MVC, Web API (.NET Framework 4.8), and ASP.NET Core (.NET 10).
• Design software architectures with layered/clean architecture, SOLID, and API design best practices.
• Strong SQL Server experience including schemas, queries, indexing, EF6/EF Core, Dapper/ADO.NET.
• Performance analysis and tuning to resolve production bottlenecks at scale.
• Experience with asynchronous processing, distributed systems, testing strategies, and mentoring.

Responsibilities

• Own technical health of .NET Framework 4.8 and .NET 10 apps, ensuring stability and security.
• Lead analysis and resolution of complex production issues by root cause
• Drive optimization across performance, DB queries, indexing, and technical debt
• Define approaches for new features, align with architecture and long-term objectives
• Assess current architectures and advocate pragmatic modernization incl. .NET 10
• Own full SDLC from design to deployment and monitoring
• Collaborate with product, design, data teams to deliver impactful solutions
• Promote performance, security, reliability standards and mentor engineers

Skills

5+ years experience

C# expertise

ASP.NET MVC

Web API

ASP.NET Core

SQL Server

Entity Framework 6/Core

Dapper/ADO.NET

Performance optimization

Distributed systems

Unit/Integration testing

AI concepts

Education

Formal education or equivalent

Tools

Visual Studio

SQL Server

Entity Framework

Dapper

ASP.NET MVC

ASP.NET Web API

ASP.NET Core

Job description

Moody's is seeking a Senior Software Engineer (C# / .NET) to join the Orbis platform within Moody's Analytics. You will own end-to-end development across .NET Framework and .NET 10, optimize performance, and design scalable software architectures.

Collaborate with product, design, and data teams to deliver AI‑powered, reliable solutions for financial data platforms. You will mentor engineers, participate in code reviews, and contribute to modernization efforts while handling sensitive financial