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We are searching for a Lead .NET Engineer to take ownership 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: breaking down a monolithic .NET Framework 4.8 / VB.NET codebase into five independently deployable ASP.NET Core services, all while preserving every regulatory workflow FDIC-supervised banks rely on at filing time.
Responsibilities
- Steer the backend migration initiative from a legacy monolithic desktop application toward a cloud-native, containerized architecture
- Guide the breakdown of the existing codebase into independently deployable backend services
- Shape architectural decisions and set the technical direction across the migration workstreams
- Support and mentor a small group of engineers, keeping the team aligned on standards, patterns, and delivery targets
- Work with stakeholders to convert regulatory workflow requirements into scalable technical solutions
- Craft and build backend services that address multi-tenant scenarios with strict data isolation
- Actively engage in code reviews and uphold high standards of code quality and maintainability
- Spot and mitigate technical risks throughout the migration lifecycle
- Orchestrate deployment activities and ensure services run dependably in containerised environments
- Drive continuous improvement of engineering practices, tools, and delivery workflows
Requirements
- No less than 5 years of applied professional experience in backend .NET engineering, with proven experience guiding a team of 2 to 4 engineers
- Hands-on background with legacy migration initiatives that move applications onto a new technology stack
- Track record of designing and delivering multi-tenant SaaS backends with per-tenant data isolation
- Practical delivery of microservices operating on Kubernetes
- Senior-level command of C# and ASP.NET Core (Current)
- Applied experience with Entity Framework Core, covering global query filters, optimistic concurrency, and migration management
- Working expertise in PostgreSQL including schema design, Row-Level Security, and multi-tenant patterns
- Hands-on experience with OAuth 2.0 and OIDC server-side flows through Microsoft.Identity.Web, together with JWT issuance and validation
- Applied background with Docker and Kubernetes, including ownership of service manifests rather than simply consuming them
- Practical use of xUnit and Testcontainers to author integration tests against real databases
- Strong VB.NET reading comprehension, with the ability to fluently follow and reason about legacy VB.NET code without needing to write new VB.NET
- Confident English communication at B2 level or higher, in both writing and speech
Nice to have
- Background configuring Auth0 or comparable SAML/OIDC brokers for identity and access management
- Awareness of AI Assistants for boosting 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 handling Kubernetes application deployments
- Hands-on experience designing and building 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