Senior DotNET Developer - Child Support Management System

Senior .NET Developer – CSMS (Child Support Management System)


Job Summary:


We are seeking an experienced Senior .NET Developer to join the CSMS modernization team. You will design, develop, and maintain mission-critical microservices and applications that support child support case management operations. The role requires strong experience in microservices architecture — building, deploying, and maintaining loosely coupled, independently deployable services. Your work will span web application development, REST API services, batch processing, and system integrations within a cloud-native environment.


Consultants may be eligible to telecommute for more than 50% of their work hours, up to and including 100% remote work. Telecommuting arrangements require direct manager approval and are subject to change based on program needs. Consultants approved for 100% remote work must attend monthly in-person meetings at the Albany office and be available for major milestone meetings as needed.


Key Responsibilities:

• Design, develop, and maintain microservices using ASP.NET Core, following domain-driven design and service decomposition best practices
• Build and deploy loosely coupled, independently deployable services with well-defined API contracts
• Develop scalable web applications, RESTful APIs, background/worker services, and integration services for the application platform
• Develop and optimize batch and scheduled jobs (Hangfire, Quartz.NET, or Azure Functions) for high-volume data processing, reporting, and scheduled workflows
• Implement data access layers using Entity Framework Core against SQL Server or PostgreSQL databases
• Manage inter-service communication patterns including synchronous REST calls and asynchronous messaging
• Collaborate with architects and business analysts to translate requirements into technical solutions
• Participate in code reviews, enforce coding standards, and mentor junior developers
• Troubleshoot application issues and provide timely resolutions across distributed microservices
• Contribute to CI/CD pipeline improvements and deployment automation for microservices
• Write unit and integration tests to ensure code quality and reliability
• Work with cross-functional teams on system integration efforts including third-party and inter-agency data exchanges

Mandatory Qualifications:

• 7+ years of professional .NET development experience
• Strong proficiency in C# and .NET 8 (records, pattern matching, async/await, minimal APIs, latest language features)
• Proven experience designing and building microservices architectures — service decomposition, API gateway patterns, service discovery, and distributed configuration
• Extensive experience with ASP.NET Core and the .NET ecosystem (Web API, MVC, dependency injection, middleware, Identity)
• Hands-on experience with batch/background processing frameworks (Hangfire, Quartz.NET, or Azure Functions) for large-scale processing
• Solid understanding of Entity Framework Core for ORM and database interaction
• Experience with SQL Server, PostgreSQL, or similar relational databases
• Proven track record of building and consuming RESTful APIs with proper versioning and contract-first design
• Experience with inter-service communication patterns (REST, messaging queues, event-driven)
• Experience deploying and operating microservices on Azure (App Service, AKS, Azure SQL, Blob Storage, Service Bus, Azure Functions) or AWS equivalents
• Familiarity with CI/CD tools (Azure DevOps, GitHub Actions, Jenkins, or similar) for microservices deployment pipelines
• Strong understanding of software design patterns, SOLID principles, and clean code practices
• Experience with Git version control and collaborative development workflows
• Understanding of distributed system concerns: fault tolerance, circuit breakers, retries, and observability

Desirable Qualifications:

• Experience with government or public sector projects
• Hands-on experience with microservices patterns such as saga, CQRS, event sourcing, and API composition
• Familiarity with service mesh technologies
• Experience with containerization (Docker) and orchestration (Kubernetes/AKS) for microservices deployment
• Knowledge of message-driven architecture (Azure Service Bus, RabbitMQ, Kafka) for asynchronous inter-service communication
• Knowledge of API gateway solutions (Azure API Management, Ocelot, YARP)
• Experience with centralized logging and distributed tracing across microservices (Application Insights, Serilog, Splunk, Datadog, OpenTelemetry)
• Knowledge of infrastructure-as-code (Terraform, Bicep, ARM templates)
• Understanding of OAuth2/OpenID Connect for securing microservices (Azure AD / Entra ID, IdentityServer, Duende)
• Knowledge of database-per-service patterns and database migration tools (EF Core Migrations, FluentMigrator, etc.)

Flexible work from home options available.