Senior .NET Engineer

We are on the lookout for a Senior .NET Engineer to take charge of the backend migration of a mature Windows desktop application for FDIC Call Report preparation into a cloud-native, containerized architecture running on Kubernetes. This is a greenfield-on-legacy engagement: splitting a monolithic .NET Framework 4.8 / VB.NET codebase into five independently deployable ASP.NET Core services, while safeguarding every regulatory workflow that FDIC-supervised banks depend on at filing time.

Responsibilities

• Drive the backend migration effort from a legacy monolithic desktop application toward a cloud-native, containerized architecture
• Direct the splitting of the existing codebase into independently deployable backend services
• Influence architectural choices and define the technical direction across the migration workstreams
• Coach and support a small group of engineers, keeping the team aligned on standards, patterns, and delivery objectives
• Partner with stakeholders to translate regulatory workflow requirements into scalable technical solutions
• Design and construct backend services that handle multi-tenant scenarios with rigorous data isolation
• Take an active role in code reviews and maintain high standards of code quality and maintainability
• Identify and address technical risks throughout the migration lifecycle
• Coordinate deployment activities and keep services running reliably in containerised environments
• Push forward continuous improvement of engineering practices, tools, and delivery workflows

Requirements

• A minimum of 3 years of hands-on professional experience in backend .NET engineering
• Applied experience with legacy migration efforts that transition applications onto a new technology stack
• Proven history of designing and delivering multi-tenant SaaS backends featuring per-tenant data isolation
• Hands-on delivery of microservices running on Kubernetes
• Senior-level fluency in C# and ASP.NET Core (Current)
• Practical experience with Entity Framework Core, spanning global query filters, optimistic concurrency, and migration management
• Working proficiency in PostgreSQL, including schema design, Row-Level Security, and multi-tenant patterns
• Applied experience with OAuth 2.0 and OIDC server-side flows via Microsoft.Identity.Web, alongside JWT issuance and validation
• Hands-on background with Docker and Kubernetes, including ownership of service manifests rather than merely consuming them
• Practical experience with xUnit and Testcontainers for authoring integration tests against real databases
• Solid VB.NET reading comprehension, with the ability to confidently trace and reason about legacy VB.NET code without needing to write new VB.NET
• Fluent English communication at B2 level or higher, in both written and spoken forms

Nice to have

• Experience setting up Auth0 or similar SAML/OIDC brokers for identity and access management
• Awareness of AI Assistants for enhancing development activities and productivity
• Working familiarity with Azure Pipelines for CI/CD automation
• Understanding of Google Cloud Platform for cloud infrastructure and service operations
• Practical exposure to Helm for managing Kubernetes application deployments
• Hands-on background designing and constructing REST APIs
• Familiarity with SAML for federated authentication scenarios
• Awareness of XBRL for structured business reporting use cases
• Experience with OpenTelemetry SDK instrumentation for observability and tracing