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.).