.NET Developer Programmer

Aries Solutions Intl Inc; New York (NY); On-site; USD 120,000 - 150,000; Full time

Job summary

Aries Solutions Intl Inc in New York is seeking a senior .NET professional to decommission a Java-based application and its services while ensuring data integrity through migration, archival, and validation. You will design and maintain apps using ASP.NET, EF, and Web APIs, and support system integrations across the stack.

The role requires hands-on experience with C#, ASP.NET MVC, and .NET Core, plus RESTful and SOAP services, SQL Server 2019, and front-end basics (HTML5/CSS3, Angular 8).

Qualifications

• Must have strong experience in C# for backend development.
• Proven experience in ASP.NET MVC for building scalable, maintainable web applications.
• Deep understanding and hands-on experience with .NET Core for building robust, high-performance, cross-platform applications.

Responsibilities

• Decommission a Java-based application, including services, databases, and infrastructure.
• Inventory system and map dependencies across integrations; perform impact analysis.
• Decommission application code, APIs, batch processes; perform data extraction, archival, and migration with data integrity validation.
• Retire all services, middleware, infrastructure, and third-party components in a controlled manner.
• Design, develop, and maintain applications using ASP.NET, Web Forms, EF, and Web APIs; build new web services and support integrations.

Skills

C# backend

ASP.NET MVC

EF Core / ORM

SQL Server 2019

RESTful APIs

SOAP Web Services

Angular 8

HTML5 / CSS3

SSRS

Crystal Reports

Unit Testing (XUnit/MSTest/NUnit)

CI/CD (Azure DevOps/Jenkins)

Git

Tools

Git

Azure DevOps

Jenkins

Docker

Kubernetes

Job description

The candidate will decommission a Java-based application, including associated services, databases, and infrastructure.

Responsibilities include system inventory, dependency mapping, and impact analysis across integrations.

The candidate will decommission application code, APIs, and batch processes, and perform data extraction, archival, and/or migration per retention policies, with validation to ensure data integrity.

All application services, middleware, infrastructure, and third-party components must be retired in a controlled manner.

Application Development (60%)

The candidate will design, develop, and maintain applications using ASP.NET, Web Forms, Entity Framework (EF), and Web APIs.

Responsibilities include building new web services, enhancing existing applications, supporting system integrations, and performing testing and deployment.

The role also includes troubleshooting, performance optimization, and ongoing technical support.

Deliverables include decommissioning plans, runbooks, validation reports, technical design documents, code artifacts, test results, and deployment documentation.

MANDATORY SKILLS/EXPERIENCE

C#: Must have strong experience in C# for backend development, including writing clean, maintainable, and performant code.

Proven experience in ASP.NET MVC for building scalable, maintainable web applications.

Deep understanding and hands-on experience with .NET Core for building robust, high-performance, cross-platform applications.

Entity Framework (EF):

Experience in EF Core or EF 6 for object-relational mapping (ORM).

Experience in Code First or Database First approaches with EF.

Proficient in writing LINQ queries to interact with databases.

Strong understanding of EF migrations, optimizing EF queries, and managing complex data relationships.

SQL Server 2019:

Must have experience in designing databases, writing optimized SQL queries, stored procedures, and handling database performance tuning in SQL Server 2019.

Web Services:

RESTful APIs:

Experience in designing and consuming REST APIs using ASP.NET Core Web API.

SOAP Web Services:

Hands-on experience in working with SOAP web services, WSDL, and XML-based services.

Frontend Technologies:

HTML/CSS:

Solid knowledge of HTML5 and CSS3 for responsive web design and UI development.

Angular 8: In-depth experience in developing Single Page Applications (SPAs) using Angular 8, including knowledge of components, directives, services, and routing.

Reporting & Data Presentation:

SSRS (SQL Server Reporting Services): Hands-on experience with SSRS to create and deploy interactive, parameterized reports integrated within a web application.

Crystal Reports:

Strong experience in designing and generating reports using Crystal Reports and embedding them into applications.

Software Design & Architecture:

Solid understanding of the Model-View-Controller (MVC) architecture for web application development.

Design Patterns:

Experience with common design patterns like Repository Pattern, Factory Pattern, and Singleton Pattern.

Unit Testing & TDD:

Experience with Unit Testing using frameworks such as XUnit, MSTest, or NUnit.

Familiar with Test-Driven Development (TDD) practices to ensure high code quality.

Version Control & CI/CD:

Git: Proficiency in using Git for version control and collaboration in a team-based environment.

CI/CD:

Hands-on experience with Continuous Integration and Continuous Deployment (CI/CD) practices using tools like Azure DevOps, Jenkins, or GitLab CI.

Security:

Authentication/Authorization: Experience in implementing user authentication and authorization, including OAuth, JWT (JSON Web Tokens), and role-based access control (RBAC) in a web application.

Soft Skills:

Communication:

Excellent communication skills to effectively collaborate with cross-functional teams, stakeholders, and non-technical team members.

Problem‑Solving:

Strong analytical and problem‑solving abilities to troubleshoot issues and devise optimal solutions.

Additional Preferred (Non-Mandatory) Skills:

Experience in designing and developing microservices-based applications.

Performance Optimization:

Proven track record of optimizing both frontend and backend performance, including database query optimization.

Familiarity with containerizing applications and deploying them using Docker and Kubernetes for scaling.

DESIRABLE SKILLS/EXPERIENCE:

The selected candidate must have excellent verbal and written communication skills and have the ability to interact professionally with a diverse group including executives, managers, and subject matter

experts. The candidate should be a team player.

SPECIAL REQUIREMENTS:

The selected candidate(s) must submit fingerprints and criminal background searches, reports of the record of arrests, and prosecutions maintained by the New York State Division of Criminal Justice Services

(DCJS) and the Federal Bureau of Investigations (FBI) to OATH for review and clearance prior to award.

And sign a non-disclosure form.

Resumes should be provided for each consultant submitted in the RFI response in addition to references from at least three former or current clients where the consultant has performed the same or similar work.

Provide the name, address, phone number and e-mail address of the reference as well as a brief description of the work performed.