Senior .Net Application Engineer

Seneca Resources; New York (NY); On-site; USD 89,544,000 - 96,707,520; Full time

Job summary

Seneca Resources in New York seeks a Senior .Net Application Engineer for a contract role at West End Avenue. You will provide day-to-day production support for enterprise applications and contribute to modernization initiatives.

The role requires 8+ years with C#, .NET, ASP.NET, VB.NET, SQL Server, SharePoint, and Power Apps/Power Automate. In-person interview; on-site work on Microsoft stack.

Qualifications

• Bachelor's degree or equivalent professional experience.
• 8+ years of enterprise application experience.
• Strong expertise with C#, .NET Framework, .NET Core, ASP.NET, VB.NET.
• Experience with SQL Server and T-SQL.
• Experience with SharePoint Online/SharePoint Server.
• Power Apps and Power Automate experience.
• Strong IIS, deployment, and production support knowledge.

Responsibilities

• Provide day-to-day production support for enterprise business applications.
• Investigate, troubleshoot, and resolve incidents and root causes.
• Monitor application health, performance, and stability.
• Participate in incident response, problem management, and releases.
• Design, develop, and maintain enterprise applications using Microsoft technologies.
• Deliver enhancements, bug fixes, and new functionality while maintaining stability.
• Support application modernization initiatives.

Skills

C#

.NET Framework

.NET Core

ASP.NET

VB.NET

SQL Server

T-SQL

SharePoint Online/SharePoint Server

Microsoft Power Apps

Microsoft Power Automate

IIS Administration

Git

Agile/Scrum

Education

Bachelor's degree in Computer Science, Information Technology, Engineering, or equivalent professional experience

Tools

Git

IIS Administration

SharePoint Online / SharePoint Server

Microsoft Power Apps

Microsoft Power Automate

Job description

Job title: Senior .Net Application Engineer

Location: West End Avenue New York

Rate: $65/hour on W2

Type: Contract

Must: In-person interview

Key Responsibilities

Application Support & Production Operations

• Provide day-to-day production support for enterprise business applications.
• Investigate, troubleshoot, and resolve application incidents while identifying root causes and implementing long-term solutions.
• Monitor application health, system performance, and operational stability.
• Participate in incident response, problem management, and production support activities.
• Design, develop, and maintain enterprise applications using Microsoft technologies.
• Deliver enhancements, bug fixes, and new functionality while maintaining application stability.
• Analyze existing applications and implement improvements using modern software engineering practices.
• Support ongoing application modernization initiatives.

Microsoft Platform Solutions

• Develop and maintain solutions within Microsoft SharePoint Online and SharePoint Server environments.
• Build and support Microsoft Power Apps and Power Automate solutions that improve business processes.
• Collaborate with business users to enhance workflows and automate manual processes.

Database Administration & Development

• Develop and optimize SQL Server databases, stored procedures, views, and queries.
• Troubleshoot database performance issues and implement indexing and optimization strategies.
• Support database maintenance, schema updates, and data integrity initiatives.
• Work closely with business analysts, stakeholders, developers, and infrastructure teams to deliver application improvements.
• Prepare technical documentation, implementation plans, and operational procedures.
• Participate in Agile ceremonies, code reviews, and release planning.
• Recommend process improvements that increase application reliability, maintainability, and operational efficiency.

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, Engineering, or equivalent professional experience.
• 8+ years of experience supporting and developing enterprise applications.
• Strong expertise with C#, .NET Framework, .NET Core, ASP.NET, and VB.NET.
• Experience supporting and enhancing legacy Microsoft applications.
• Strong SQL Server and T-SQL development experience.
• Experience with SharePoint Online and/or SharePoint Server.
• Experience developing solutions using Microsoft Power Apps and Power Automate.
• Strong understanding of IIS, application deployment, configuration, and production support.
• Experience troubleshooting complex production issues and performing root cause analysis.
• Excellent communication, documentation, and problem-solving skills.

Technical Skills

Must Have

• C#
• ASP.NET
• VB.NET
• SQL Server
• T-SQL
• SharePoint Online / SharePoint Server
• Microsoft Power Apps
• Microsoft Power Automate
• IIS Administration
• Application Production Support
• Git
• Agile / Scrum

About Seneca Resources

At Seneca Resources, we are more than just a staffing and consulting firm—we are a trusted career partner. With offices across the U.S. and clients ranging from Fortune 500 companies to government organizations, we provide opportunities that help professionals grow their careers while making a meaningful impact.

Seneca consultants and contractors enjoy competitive compensation, comprehensive health, dental, and vision benefits, 401(k) retirement plans, and the support of a dedicated team that advocates every step of the way. Seneca Resources is proud to be an Equal Opportunity Employer, committed to building a diverse and inclusive workforce where all qualified individuals are encouraged to apply.