Lead .NET Engineer

Description

Summary: Lead a backend migration for a mature Windows desktop application to a cloud-native, containerized architecture on Kubernetes, decomposing a monolithic .NET Framework codebase into ASP.NET Core services. Highlights: 1. Lead backend migration to cloud-native, containerized architecture 2. Drive architectural decisions and shape technical direction 3. Guide and mentor a team of engineers We are looking for a **Lead .NET Engineer** to own the backend migration of a mature Windows desktop application for FDIC Call Report preparation to a cloud\-native, containerized architecture on Kubernetes. This is a greenfield\-on\-legacy engagement: decomposing a monolithic .NET Framework 4\.8 / VB.NET codebase into five independently deployable ASP.NET Core services, while preserving every regulatory workflow FDIC\-supervised banks depend on at filing time. **Responsibilities** * Lead the backend migration effort from a legacy monolithic desktop application to a cloud\-native, containerized architecture * Oversee the decomposition of the existing codebase into independently deployable backend services * Drive architectural decisions and shape the technical direction across the migration workstreams * Guide and mentor a small team of engineers, ensuring alignment on standards, patterns, and delivery goals * Collaborate with stakeholders to translate regulatory workflow requirements into scalable technical solutions * Design and implement backend services that support multi\-tenant use cases with strict data isolation * Take an active part in code reviews and enforce high standards of code quality and maintainability * Identify and mitigate technical risks throughout the migration lifecycle * Coordinate deployment activities and ensure services operate reliably in containerised environments * Contribute to continuous improvement of engineering practices, tools, and delivery workflows **Requirements** * At least 5 years of professional relevant experience in backend .NET engineering, with demonstrable experience leading a team of 2 to 4 engineers * Practical experience with legacy migration efforts moving applications to a new technology stack * Background designing and delivering multi\-tenant SaaS backends with per\-tenant data isolation * Hands\-on delivery of microservices running on Kubernetes * Senior\-level proficiency in C\# and ASP.NET Core (Current) * Applied experience with Entity Framework Core, including global query filters, optimistic concurrency, and migration management * Working knowledge of PostgreSQL covering schema design, Row\-Level Security, and multi\-tenant patterns * Practical experience with OAuth 2\.0 and OIDC server\-side flows using Microsoft.Identity.Web, along with JWT issuance and validation * Hands\-on experience with Docker and Kubernetes, including ownership of service manifests rather than only consuming them * Applied background with xUnit and Testcontainers for authoring integration tests against real databases * Strong VB.NET reading comprehension, with the ability to fluently trace and reason about legacy VB.NET code without needing to write it * Confident English communication at B2 level or higher, both written and spoken **Nice to have** * Experience configuring Auth0 or equivalent SAML/OIDC brokers for identity and access management * Familiarity with AI Assistants for supporting development activities and productivity * Working knowledge of Azure Pipelines for CI/CD automation * Awareness of Google Cloud Platform for cloud infrastructure and service operations * Practical exposure to Helm for managing 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 **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