Senior .NET Developer - Full Stack / API & SQL

Date Posted: 10/08/2026
Hiring Organization: Rose International
Position Number: 508880
Industry: Government
Job Title: Senior .NET Developer - Full Stack / API & SQL
Job Location: St. John's, NL, Canada, A1B 2Y4
Work Model: Onsite
Shift: General shift
Employment Type: Temporary
FT/PT: Full-Time
Estimated Duration (In months): 6
Min Hourly Rate($): 60.00
Max Hourly Rate($): 75.00
Must Have Skills/Attributes: .Net, ASP.net, C#, CSS, GIT, HTML, JavaScript, MVC, RESTful, SOAP, SQL
Experience Desired:
Contribute to front-end development using modern web technologies integrated with .NET back-end (5 yrs),
Implement UI components aligned with UX designs and accessibility standards (5 yrs),
Design, develop, and maintain RESTful API services using .NET technologies (5 yrs),
Support API testing, documentation, and deployment activities across environments (3 yrs),
Extensive experience working with relational database platforms (5 yrs)
Required Minimum Education: Associate's Degree
**C2C is not available**
Job Description
Required Education:
Post-secondary education (2+ year program) in Computer Science, Information Systems, Management, or Business from a recognized institution, or equivalent demonstrated professional experience
Required skills:
Advanced hands-on proficiency with the Microsoft .NET stack, including:
C#
ASP.NET Core / MVC
ASP.NET Framework
RESTful and SOAP-based web services
Git-based version control
Extensive experience working with relational database platforms, encompassing:
SQL development (queries and stored procedures)
Microsoft SQL Server
Data extraction, reporting feeds, and exports
Proven capability in developing front-end solutions and user interface enhancements, using:
HTML and CSS, including modern CSS frameworks
JavaScript
Razor and/or Blazor technologies
5+ years of demonstrated experience operating in a Systems Analyst / Developer capacity, with recent hands-on involvement in the Microsoft .NET ecosystem (.NET Framework and/or .NET Core)
Strong experience designing, developing, and integrating secure, scalable APIs, including RESTful and service-based implementations, and supporting downstream data extraction, reporting, and analytics capabilities
Our client is seeking a Systems Analyst II (.NET Developer) for the Mainframe Modernization Project Team within the Design & Delivery Branch. The .NET Developer will join the project team to support technical design and development and support application work streams across the integration, data, and presentation layers. The role is responsible for delivering scalable API services, executing data migration activities, and contributing to front-end development to ensure a cohesive, end-to-end solution aligned with business and technical requirements.
Primary Job Duties:
Custom Development, Project Engagement and Supporting Tasks:
System enhancements and functionality updates
Contribute to front-end development using modern web technologies integrated with .NET back-end services
Implement UI components aligned with UX designs and accessibility standards
Participate in troubleshooting and performance optimization across the UI layer
Ensure design consistency between core solution and associated modules/portals
Attend regular team stand-ups and other development-focused meetings
Assist with solution design documentation
Assist with solution testing (including scripts, execution, and remediation)
Track task statcompletion within project KanBan/Planner boards
Secondary Responsibilities:
Integration & API Services and Data Migration:
Design, develop, and maintain RESTful API services using .NET technologies
Implement secure, performant, and scalable integration patterns
Collaborate with other team members to redefine/redevelop existing data extract processes and procedures
Support API testing, documentation, and deployment activities across environments
Participate in the planning and execution of data migration activities from legacy or source systems to target platform
Develop and maintain migration utilities, transformation logic, and validation routines
Perform data quality checks, reconciliation, and issue resolution in coordination with data and business stakeholders
Support migration testing cycles and cutover activities as required

• **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.).