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
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Drive the backend migration effort from a legacy monolithic desktop application toward a cloud-native, containerized architecture
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Direct the splitting of the existing codebase into independently deployable backend services
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Influence architectural choices and define the technical direction across the migration workstreams
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Coach and support a small group of engineers, keeping the team aligned on standards, patterns, and delivery objectives
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Partner with stakeholders to translate regulatory workflow requirements into scalable technical solutions
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Design and construct backend services that handle multi-tenant scenarios with rigorous data isolation
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Take an active role in code reviews and maintain high standards of code quality and maintainability
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Identify and address technical risks throughout the migration lifecycle
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Coordinate deployment activities and keep services running reliably in containerised environments
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Push forward continuous improvement of engineering practices, tools, and delivery workflows
Requirements
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A minimum of 3 years of hands-on professional experience in backend .NET engineering
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Applied experience with legacy migration efforts that transition applications onto a new technology stack
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Proven history of designing and delivering multi-tenant SaaS backends featuring per-tenant data isolation
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Hands-on delivery of microservices running on Kubernetes
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Senior-level fluency in C# and ASP.NET Core (Current)
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Practical experience with Entity Framework Core, spanning global query filters, optimistic concurrency, and migration management
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Working proficiency in PostgreSQL, including schema design, Row-Level Security, and multi-tenant patterns
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Applied experience with OAuth 2.0 and OIDC server-side flows via Microsoft.Identity.Web, alongside JWT issuance and validation
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Hands-on background with Docker and Kubernetes, including ownership of service manifests rather than merely consuming them
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Practical experience with xUnit and Testcontainers for authoring integration tests against real databases
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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
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Fluent English communication at B2 level or higher, in both written and spoken forms
Nice to have
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Experience setting up Auth0 or similar SAML/OIDC brokers for identity and access management
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Awareness of AI Assistants for enhancing development activities and productivity
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Working familiarity with Azure Pipelines for CI/CD automation
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Understanding of Google Cloud Platform for cloud infrastructure and service operations
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Practical exposure to Helm for managing Kubernetes application deployments
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Hands-on background designing and constructing REST APIs
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Familiarity with SAML for federated authentication scenarios
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Awareness of XBRL for structured business reporting use cases
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Experience with OpenTelemetry SDK instrumentation for observability and tracing
We offer
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International projects with top brands
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Work with global teams of highly skilled, diverse peers
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Healthcare benefits
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Employee financial programs
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Paid time off and sick leave
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Upskilling, reskilling and certification courses
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Unlimited access to the LinkedIn Learning library and 22,000+ courses
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Global career opportunities
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Volunteer and community involvement opportunities
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EPAM Employee Groups
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Award-winning culture recognized by Glassdoor, Newsweek and LinkedIn
EPAM is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, sexual orientation, gender identity or expression, disability, protected veteran status, or any other characteristic protected by applicable law.
