Senior Net Core Developer Jobs in Rosemont, IL (NOW HIRING)

Role: Senior .NET Reporting & Migration Architect (Web FOCUS to FastReports.NET)

Location: ONSITE- Minneapolis / Chicago

Duration: 6 months

Job Description:

Bill Rate: MAX CONFIRMED $60 to $65/hr on C2C

Descriptions:

"Senior .NET Reporting & Migration Architect (Web FOCUS to FastReports.NET) Location Minneapolis / Chicago, IL

Role Overview: We are seeking a Senior .NET Reporting & Migration Specialist to lead the migration of enterprise reporting capabilities from Web FOCUS to a modern .NET Core–based reporting engine leveraging FastReports.NET.  This role will be responsible for designing scalable, secure, and maintainable reporting services, integrating with enterprise systems, and enabling asynchronous and event-driven report processing using Azure Service Bus.

Key Responsibilities:

Reporting Platform Migration & Architecture

•       Lead the end-to-end modernization of Web FOCUS reports, data logic, and scheduling into a .NET-based reporting framework.

•       Analyze legacy Web FOCUS components (FEX procedures, data sources, parameters, access controls).

•       Design a target-state reporting architecture using .NET Core, Web APIs, and FastReports.NET.

•       Define standards for report templates, metadata, versioning, scheduling, and distribution.

.NET Development & Engineering

•       Develop .NET Core / ASP.NET Web API services for report execution and delivery.

•       Build and maintain report templates using FastReports.NET.

•       Create reusable components for data access, filtering, and report export (PDF, Excel, CSV).

•       Ensure performance optimization using EF Core, LINQ, and optimized SQL queries.

Data Integration & Messaging

•       Work extensively with SQL Server for data retrieval and transformation.

•       Implement Azure Service Bus for:

o       Asynchronous report processing.

o       Long running or batch report generation

o       Event-driven report triggers and orchestration

•       Integrate reporting services with upstream and downstream enterprise applications.

DevOps, Quality & Governance

•       Implement CI/CD pipelines using Azure DevOps.

•       Ensure adherence to enterprise security, logging, error handling, and monitoring standards.

•       Conduct design and code reviews, mentor and guide development teams.

•       Produce architectural documentation, migration guidelines, and operational runbooks.

Stakeholder & Business Collaboration

•       Partner with business users and data teams to validate report accuracy and behavior.

•       Translate functional requirements into scalable reporting solutions.

•       Provide technical leadership throughout the migration lifecycle.

Required Technical Skillset

Core Engineering Skills (Must-Have)

•       .NET Core / .NET 6+, C#.

•       ASP.NET Core Web API.

•       Microservices architecture.

•       Entity Framework Core (EF Core) and LINQ.

•       SQL Server (complex queries, performance tuning).

•       Web FOCUS (report development, procedures, data handling).

Reporting Technologies

•       FastReports.NET (preferred; hands-on experience is a strong advantage).

o       Report design and layout.

o       Parameterized reports.

o       Multiple output formats.

•       Experience with other enterprise reporting tools is acceptable if Fast Reports exposure is limited.

Cloud & DevOps

•       Azure Cloud & Azure DevOps (Repos, Pipelines, Releases).

•       Experience deploying .NET services to Azure or cloud environments.

•       Understanding of application monitoring, diagnostics, and operational support.

Messaging & Integration

•       Azure Service Bus.

o       Queues and topics.

o       Asynchronous processing.

o       Event-driven workflows and decoupled services.

Experience Requirements

•       8–12+ years of overall software development experience.

•       5+ years in enterprise-scale .NET development.

•       3+ years of hands-on Web FOCUS experience.

•       Proven experience leading or enabling legacy reporting migrations.

•       Strong architectural and system design experience.

Nice-to-Have / Added Advantage

•       Direct implementation experience with FastReports.NET.

•       Experience modernizing BI or reporting platforms.

•       Knowledge of access control and report-level security models.

•       Containerization experience (Docker / Kubernetes).

Soft Skills & Leadership Traits

•       Strong problem-solving and analytical mindset.

•       Excellent communication with technical and non-technical stakeholders.

•       Ability to operate independently in ambiguous migration environments.

•       Mentorship and technical leadership capabilities.

Skills: Core .NET Technologies~ASP.NET 4.5 Experience Required: 10 & Above