About the Company

We are hiring a Senior Software Engineer to support and enhance a large, mature enterprise platform built on the Microsoft/.NET stack. This role is focused on maintaining, modernizing, and extending a complex production application that supports payroll, HR, time collection, labor management, scheduling, reporting, and integrations with third-party systems.

About the Role

This is not a greenfield role. The right engineer needs to be comfortable working inside a long-lived enterprise codebase, understanding existing architecture, making careful improvements, and solving production issues without destabilizing the platform. The environment includes ASP.NET Web Forms, C#/.NET Framework, MS SQL Server, IIS, NHibernate, XML/XSLT, Web API 2, OData, and related Microsoft technologies. This is a strong fit for an experienced engineer who has real depth in legacy enterprise .NET systems and understands how to keep business-critical software running while improving it over time.

Responsibilities

• Maintain and enhance a large-scale enterprise application built on C#/.NET Framework and ASP.NET Web Forms.
• Work across the full application stack, including frontend Web Forms, service layers, database logic, integrations, and deployment environments.
• Write, optimize, and troubleshoot advanced T-SQL queries, stored procedures, indexes, and execution plans.
• Support and improve IIS-hosted applications, including application pools, configuration, deployments, and production troubleshooting.
• Use NHibernate in a production environment, including mappings, SessionFactory, DAO patterns, and second-level caching.
• Work heavily with XML and XSLT to support forms, reports, templates, and application rendering logic.
• Build and maintain RESTful endpoints using Web API 2 and OData.
• Diagnose and resolve performance, reliability, integration, and data issues in a production environment.
• Contribute to deployment automation using PowerShell and related tooling.
• Participate in code reviews, technical design discussions, debugging, testing, and release support.
• Make thoughtful improvements to legacy systems while preserving stability and business continuity.

Qualifications

• 6+ years of professional experience with C# and .NET Framework.

Required Skills

• Deep hands-on experience with ASP.NET Web Forms.
• Advanced MS SQL Server / T-SQL experience, including:
• Complex query writing
• Stored procedures
• Indexing strategies
• Execution plan analysis
• Performance tuning
• Hands-on IIS administration experience, including:
• Application pool management
• Configuration
• Troubleshooting
• Deployment support
• Experience with PowerShell-driven deployment automation, ideally at scale.
• Production experience with NHibernate, including:
• Mappings
• SessionFactory
• DAO pattern
• Second-level caching
• Strong proficiency with XML and XSLT.
• Experience maintaining and extending large, legacy enterprise .NET applications.
• Experience with Web API 2 and OData.
• Strong understanding of RESTful service layers and client or integration-facing endpoints.
• Ability to work carefully in a mature production system where stability matters.

Preferred Skills

• Quartz.NET scheduling.
• Entity Framework 6.
• Azure DevOps CI/CD pipelines.
• AWS SDK, including Secrets Manager or S3.
• Payroll, HR, workforce management, time-and-attendance, or labor-management domain experience.
• Experience supporting high-volume, multi-client, or business-critical enterprise applications.

Pay range and compensation package

Not specified in the job description.

Equal Opportunity Statement

We are committed to diversity and inclusivity in our hiring practices.