Senior .NET Engineer

Description

Summary: Seeking a Senior .NET Engineer to lead the backend migration of a legacy Windows desktop application to a cloud-native, containerized architecture on Kubernetes. Highlights: 1. Drive backend migration to cloud-native, containerized architecture 2. Influence architectural choices and technical direction 3. Coach and support a small group of engineers 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 **We offer** * International projects with top brands * Work with global teams of highly skilled, diverse peers * Healthcare benefits * Employee financial programs * Paid time off and sick leave * Upskilling, reskilling and certification courses * Unlimited access to the LinkedIn Learning library and 22,000\+ courses * Global career opportunities * Volunteer and community involvement opportunities * EPAM Employee Groups * Award\-winning culture recognized by Glassdoor, Newsweek and LinkedIn