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DellFor Technologies

IT services and staffing firm

Senior .NET Developer

Full-TimePosted on 2/20/2026
$80k/yr+ Relocation allowance + Referral bonus + Travel allowance
Senior, Expert
Bachelor's, Master's
Ohio City, OH, USA
In Person
Software EngineeringFull-Stack Engineering
No H1B Sponsorship

About the job

Requirements
  • At least 5 years of web application development experience in the Microsoft .NET stack, including C# and Windows Presentation Foundation.
  • At least 1 year of web application development experience with open-source stacks such as MEAN or MERN.
  • At least 2 years of coding experience with JavaScript, ECMAScript 6, jQuery, HTML, CSS, and C#.
  • At least 5 years of experience developing REST web APIs.
  • A strong understanding of web application security principles and frameworks including JSON Web Tokens, Security Assertion Markup Language, and OAuth.
  • A degree in Computer Science or an equivalent degree.
  • At least 7 years of software development experience, or at least 8 years of industry experience as stated in the qualifications.
  • At least 3 years of technical lead and architect experience.
  • Proficiency in ASP.NET and ASP.NET MVC web frameworks.
  • Experience with C#, JavaScript, jQuery, AJAX, HTML, and CSS.
  • Development experience with enterprise-class systems using multi-tier architecture.
  • Experience with .NET web application architecture, design, and development.
  • Broad experience with .NET Framework 3.5 or above, including Windows Presentation Foundation, Windows Communication Foundation, and Windows Workflow Foundation.
  • Expertise in ASP.NET MVC, Web Forms, and Entity Framework.
  • Expertise in ADO.NET, WCF Data Services, and LINQ.
  • Expertise in design patterns, service-oriented architecture design, and web service development.
  • Strong experience developing for high-availability clustered environments.
  • Working knowledge of Linux and Windows.
  • A strong understanding of data warehouse concepts, data marts, and master data management.
  • Ability to write reports using report-generation tools and languages.
  • Expertise in SQL statements.
  • Strong written and verbal English skills.
  • Ability to work in an Agile development environment.
Responsibilities
  • Participate in the full software lifecycle from ideation through rollout, including requirements analysis, design, coding, testing, and production release.
  • Write modular, secure, and well-tested front-end code using JavaScript, HTML, and CSS.
  • Develop middle-tier services using C# and Node.js.
  • Develop persistent data layers using SQL and NoSQL technologies.
  • Participate in code reviews and documentation.
  • Apply security principles to web applications.
  • Use automated analysis tools to evaluate the scalability and performance of web solutions.
  • Work with external teams and resolve roadblocks.
  • Develop large-scale web applications with multiple touch points, responsive user interfaces, and enterprise multi-tier architecture.
Desired Qualifications
  • Experience with cloud migration using AWS or Azure.
  • Deep understanding of user interface and user experience design.
  • Experience with the Aurelia framework.
  • Experience developing large-scale web applications supporting more than 1,000 concurrent users per computing node.
  • Experience deploying software as a service products.
  • Understanding of web application security testing and the Open Web Application Security Project.
  • Custom development using Microsoft SharePoint, BizTalk, SQL Server Analysis Services, SQL Server Integration Services, SQL Server Reporting Services, master data management, and data quality services.
  • Prior experience in the insurance industry.
  • Microsoft certifications.

About the company

DellFor Technologies is an information technology services and workforce-solutions company. The company provides software development, cloud, cybersecurity, data, quality assurance, consulting, and technical staffing services. It serves businesses seeking technology delivery, modernization support, and contract or permanent technical talent. Its operating model centers on client projects and staffing engagements supported by consultants, recruiters, account teams, delivery management, and corporate operations. Teams work across software, cloud, cybersecurity, data, testing, recruiting, consulting, and client service. This structure supports consistent delivery across the organization.

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