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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # NET Developer - Legacy System Decommissioning (On-Site - **Company:** Zaass Consulting, LLC - **Location:** New York, NY, United States - **Experience:** Expert - **Contract:** Temporary contract - **Skills:** ASP.NET, .NET Framework, Application Programming Interfaces (APIs), Amazon Web Services, Application Services, ASP.NET MVC Framework, HTML5, User Authentication, Unit Testing, Microsoft Azure, Batch Processing, C Sharp (Programming Language), Cascading Style Sheets (CSS), Databases, Continuous Integration, Crystal Reports (Reporting Software), Data Integrity, Database Design, Database Queries, Software Design Patterns, DevOps, Language Integrated Query, Middleware, Entity Framework, Design of User Interfaces, Microsoft SQL Server, MongoDB, Model View Controller (MVC), NoSQL, Nunit, OAuth, Performance Tuning, Query Optimization, Role-Based Access Control, Mstest, JSON Web Token, Runbook, Singleton Pattern, Software Engineering, SQL Stored Procedures, SQL Server Reporting Services, Systems Integration, Web Applications, Web Application Frameworks, Web Services, Web Services Description Language, Extensible Markup Language (XML), Dc.js, .NET Core, ReactJS, SOAPAPI, Backend, Git, Xunit, Vue.js, AngularJS, Gitlab-ci, Kubernetes, Front End Software Development, Restful APIs, Es2015, Docker, Jenkins, Web Api, Microservices - **Published:** August 28, 2026 - **Apply:** https://www.dice.com/job-detail/2720b91f-5eff-4d38-8e65-0750b8981bae ## About the Role * 6+ years as a Programmer in .Net Development. * C# - strong backend development with clean, maintainable, performant code * ASP.NET MVC - building scalable web applications * .NET Core - hands-on, cross-platform, high-performance development Data & ORM * Entity Framework (EF Core or EF 6) - Code First / Database First * Proficient in LINQ, EF migrations, query optimization, and complex data relationships * SQL Server 2019 - database design, optimized queries, stored procedures, performance tuning Web Services * RESTful APIs - design and consume using ASP.NET Core Web API * SOAP web services, WSDL, and XML-based services Frontend * HTML5 / CSS3 - responsive UI development * JavaScript (ES6+) * Angular 8 - SPAs (components, directives, services, routing) Reporting * SSRS - interactive, parameterized reports in web apps * Crystal Reports - design, generate, and embed reports Architecture & Quality * MVC architecture and design patterns (Repository, Factory, Singleton) * Unit testing / TDD - XUnit, MSTest, or NUnit DevOps & Security * Git version control * CI/CD - Azure DevOps, Jenkins, or GitLab CI * Authentication/Authorization - OAuth, JWT, RBAC Soft Skills * Excellent verbal/written communication with diverse stakeholders * Strong analytical and problem-solving abilities; a true team player __________________________________________________ Preferred (Nice-to-Have) * Microservices architecture * Performance optimization (frontend, backend, and database queries) * Docker / Kubernetes containerization, * On-site presence is mandatory Monday-Friday at 66 John Street, NYC - local candidates strongly preferred * Must pass fingerprint and criminal background checks (NY State DCJS + FBI) prior to award * Must sign a non-disclosure agreement * Must be legally authorized to work in the United States * References required: at least three former or current clients for similar work ## Description We are seeking a skilled .NET Developer to support the decommissioning of a legacy adjudication system. This is a dual-focus role: roughly 60% application development and 40% system decommissioning., * Design, develop, and maintain applications using ASP.NET, Web Forms, Entity Framework, and Web APIs * Build new web services and enhance existing applications * Support system integrations, testing, and deployment * Troubleshoot, optimize performance, and provide ongoing technical support * Work with modern tech as needed: .NET Core / .NET 6+, RESTful APIs, microservices, AWS/Azure, React/Angular/Vue, Docker/Kubernetes, SQL Server/NoSQL/MongoDB System Decommissioning (40%) * Perform system inventory, dependency mapping, and impact analysis across integrated systems * Decommission application code, APIs, and batch processes in a controlled manner * Extract, archive, and/or migrate data per retention policies, with validation for data integrity * Retire application services, middleware, infrastructure, and third-party components * Develop decommissioning plans, runbooks, and validation documentation * Execute testing and coordinated system shutdown with stakeholders ## Related Videos - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Architectures that we can use with .NET](https://www.wearedevelopers.com/videos/935-architectures-that-we-can-use-with-net) - [NoSQL Data Modeling for Front-end Developers](https://www.wearedevelopers.com/videos/297-nosql-data-modeling-for-front-end-developers) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) - [Web development best practices in 2021](https://www.wearedevelopers.com/videos/280-web-development-best-practices-in-2021) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)