Senior .NET Developer

Date Posted: 08/03/2026

Hiring Organization: Rose International

Position Number: 505128

Industry: Government/Staffing

Job Title: Senior .NET Developer

Job Location: Hartford, CT, USA, 06103

Work Model: Hybrid

Work Model Details: Hybrid-1 day onsite per week

Shift: 8 AM to 5 PM

Employment Type: Temporary

FT/PT: Full-Time

Estimated Duration (In months): 11

Min Hourly Rate($): 55.00

Max Hourly Rate($): 60.00

Must Have Skills/Attributes: Agile, ASP.net, Azure

Experience Desired: Proficiency in ASP.NET MVC and Entity Framework for web application development. (4-6 yrs); Solid understanding of Agile/Scrum principles and practices. (4-6 yrs); Experience documenting and validating legacy-to-modern data and interface mappings. (4-6 yrs); Strong understanding of Azure platform services, including Azure SQL, App Service, Azure DevOps (4-6 yrs); Proficiency in Azure DevOps for managing work items, test cases, and defect tracking (4-6 yrs); Experience with legacy system modernization or public-sector transformation projects (4-6 yrs); Familiarity with API documentation, system integration, and report validation (4-6 yrs)

**C2C is not available**

Job Description

***Only qualified Senior .NET Developer candidates located near the Hartford, CT area will be considered due to the role requiring an onsite presence ***

Required Skills

• Proficiency in ASP.NET MVC and Entity Framework for web application development.
• Strong understanding of Azure platform services, including Azure SQL, App Service, Azure DevOps, CI/CD pipelines, and Azure Git Repositories
• Expertise in developing and executing automated data validation/testing scripts (SQL or other scripting languages)
• Strong grasp of relational databases, data modeling, and data mapping techniques
• Experience documenting and validating legacy-to-modern data and interface mappings
• Proficiency in Azure DevOps for managing work items, test cases, and defect tracking
• Solid understanding of Agile/Scrum principles and practices
• Proficiency in Microsoft Office Suite, including Excel (for data analysis) and Visio (for process mapping)

Preferred Skills

• Experience with legacy system modernization or public-sector transformation projects.
• Knowledge of security, access control, and user role management in enterprise applications.
• Familiarity with API documentation, system integration, and report validation.

About the role: Client is seeking a Senior Developer to support development work across OEC, include design and development of Power Apps, web base customer facing UI, and enhancements/bug fixes for current .NET applications. This role combines requirements analysis, software development, and data migration validation responsibilities within an Agile Scrum framework. The candidate will be a key member of a cross-functional, self-managed Scrum team, collaborating with product owners, developers, testers, and data specialists to deliver high-quality, incremental releases. A significant aspect of this position involves supporting the project’s data migration efforts, including developing and executing automated, reusable data testing scripts to validate migration accuracy across environments and documenting data and interface mappings between legacy and modernized systems.

Responsibilities

Requirements Analysis & Documentation

• Collaborate with OEC stakeholders and technical teams to elicit, analyze, and document business and system requirements.
• Translate business needs into user stories and acceptance criteria, maintaining a refined Azure DevOps product backlog.
• Document current and future state workflows, integration points, and data dependencies.
• Create and validate data mapping documents between legacy and modern systems.
• Develop interface mapping documentation to align legacy screens and functions with modernized application components.
• Define and maintain functional, non-functional, and reporting requirements, ensuring end-to-end traceability.

Software Development & Technical Implementation

• Design, develop, and refactor components using ASP.NET MVC, Entity Framework, and Azure App Service.
• Contribute to CI/CD pipeline setup and optimization using Azure DevOps and Azure Git Repositories.
• Work with Azure SQL databases to design schema, implement stored procedures, and optimize performance.
• Collaborate with data engineers on SSIS-based ETL processes and data migration activities.
• Participate in code reviews, ensuring adherence to best practices for performance, maintainability, and security.

Data Migration Validation & Testing

• Develop and maintain omnipotent (comprehensive, reusable) data validation scripts to verify migrated data after each migration cycle in test environments.
• Validate record counts, referential integrity, field-level transformations, and business rule consistency across environments.
• Identify and analyze data discrepancies, collaborating with developers and data teams to resolve issues.
• Maintain documentation for data validation procedures, testing outcomes, and transformation logic.
• Support system, integration, and user acceptance testing (UAT) by creating and executing test cases.
• Log and manage defects and testing results using Azure DevOps.

Agile/Scrum Collaboration

• Serve as an active member of a cross-functional, self-managed Scrum team responsible for delivering working software increments.
• Participate in all Scrum ceremonies—including daily stand-ups, sprint planning, reviews, and retrospectives.
• Work closely with the Product Owner to refine and prioritize backlog items and define sprint goals.
• Contribute to a culture of continuous improvement, team collaboration, and shared accountability.
• **Only those lawfully authorized to work in the designated country associated with the position will be considered.**
• **Please note that all Position start dates and duration are estimates and may be reduced or lengthened based upon a client’s business needs and requirements.**

Benefits

For information and details on employment benefits offered with this position, please visit here. Should you have any questions/concerns, please contact our HR Department via our secure website.

California Pay Equity

For information and details on pay equity laws in California, please visit the State of California Department of Industrial Relations' website here.

Rose International is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender (expression or identity), national origin, arrest and conviction records, disability, veteran status or any other characteristic protected by law. Positions located in San Francisco and Los Angeles, California will be administered in accordance with their respective Fair Chance Ordinances.

If you need assistance in completing this application, or during any phase of the application, interview, hiring, or employment process, whether due to a disability or otherwise, please contact our HR Department.

Rose International has an official agreement (ID #132522), effective June 30, 2008, with the U.S. Department of Homeland Security, U.S. Citizenship and Immigration Services, Employment Verification Program (E-Verify). (Posting required by OCGA 13/10-91.).