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Maarut

RQ00788 - Software Developer - Full Stack - Senior

Toronto, ON, Canada

Job type: Contract
Posting language: English
Posted: Sep 23, 2026

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Original job description

Responsibilities:

Design, develop, test, deploy, and maintain enterprise applications using .NET, AngularJS, JavaScript, and related technologies.
Develop and integrate secure REST APIs and modernize legacy .NET Framework, WCF, Windows Services, and Windows Forms applications.
Build responsive web user interfaces and implement secure authentication using JWT/OAuth2.
Develop high-performance, multithreaded, and asynchronous applications.
Develop, configure, and support Azure cloud services, including App Services, Azure SQL, Storage, Event Hub, ADX, Key Vault, and monitoring solutions.
Develop and optimize SQL Server databases, including complex queries, stored procedures, indexing, execution plans, and performance tuning.
Perform application testing, production troubleshooting, root-cause analysis, and performance optimization across application, database, cloud, and infrastructure layers.
Support DevOps and CI/CD processes using Azure DevOps and Git-based source control.
Conduct code reviews and ensure high-quality, maintainable, secure, and well-documented software.
Collaborate with architects, analysts, QA, infrastructure teams, and business stakeholders on technical design and solution delivery.
Contribute to application modernization and migration of legacy systems to modern Azure-based platforms.

Required Skills:

C# / .NET Development
10+ years of hands-on experience developing enterprise applications using C#, .NET Core/ASP.NET Core, and ASP.NET Framework 3.5/4.x, including modernization of legacy .NET applications.
REST API Development & Security
Strong experience designing, developing, integrating, and troubleshooting RESTful APIs, including JWT, OAuth2, authentication, and authorization.
Angular / Front-End Development
Strong experience with AngularJS, JavaScript, HTML, CSS, jQuery, and ASP.NET MVC, with experience migrating legacy AngularJS applications to modern Angular preferred.
Microsoft SQL Server & Database Development
Strong T-SQL development skills, including stored procedures, views, triggers, indexing, query optimization, execution plans, and database performance tuning.
Microsoft Azure Cloud Development
Hands-on experience with Azure App Service, Azure SQL Managed Instance, Azure Storage, Event Hub, Azure Data Explorer (ADX), Key Vault, Application Insights, and Azure Monitor.
Azure DevOps & Git
Experience with Azure DevOps, CI/CD pipelines, automated deployments, release management, GitHub, and/or Azure Repos.
Performance, Multithreading & Scalability
Strong experience with multithreaded and asynchronous programming, parallel processing, application performance optimization, and scalability across application and database layers.
Production Troubleshooting & Testing
Strong troubleshooting and root-cause analysis skills using KQL, Postman, SoapUI, Swagger/OpenAPI, IIS, application logs, monitoring tools, and database diagnostics.
Legacy Application Modernization
Experience maintaining and modernizing ASP.NET Framework, Windows Services, WCF/Web Services, Windows Forms, and IIS-hosted applications; Tomcat troubleshooting is an asset.
Software Engineering & Architecture
Strong knowledge of object-oriented programming, design patterns, software architecture, SDLC, Agile/Scrum, code reviews, clean code, and secure/maintainable software development practices.

Desired Skills:

Healthcare System Integration: Experience developing and supporting integrations between healthcare applications and systems.
HL7: Familiarity with HL7 standards and healthcare messaging, including experience troubleshooting HL7 interfaces.
FHIR: Knowledge of FHIR standards, resources, APIs, and modern healthcare interoperability.
Mirth Connect: Hands-on experience developing, configuring, monitoring, and troubleshooting Mirth Connect channels and integrations.

Rated Criteria:

Modernization & Legacy Transformation Experience: Demonstrated experience decomposing monolithic applications into modular services, APIs, or microservices. Experience developing modernization roadmaps and executing phased migrations with minimal business disruption. 20 Points
.NET Core / Backend Engineering Expertise: Advanced expertise in ASP.NET Core, REST API development, dependency injection, authentication/authorization, performance optimization, and enterprise application architecture. 20 Points
Angular Front-End Development Expertise: Experience designing and developing Angular applications, component-based architecture, state management, responsive UI design, and integration with REST services. 15 Points
Solution Architecture & Design Skills: Ability to design scalable, maintainable, secure, and loosely coupled solutions. Experience with DDD, API-first design, event-driven architecture, integration patterns, and modular architecture. 15 Points
Cloud, DevOps & CI/CD Experience: Experience deploying applications in Azure, implementing CI/CD pipelines, Infrastructure as Code, containerization, automated testing, and application monitoring.10 Points
Quality Engineering & Secure Development: Demonstrated use of automated testing, code quality tools, security best practices, threat mitigation, and technical debt reduction strategies. 10 Points
Communication & Team Collaboration Ability to work with architects, product owners, business analysts, and development teams. Experience mentoring developers and clearly communicating technical decisions.10 Points

Requirements

Deliverables:

Develop functionalities per business requirements.
Migrate applications from .NET Framework 4.x to .NET Core/.NET.
Design, develop, and implement secure RESTful APIs.
Develop modern Angular web front-ends and migrate existing AngularJS applications to Angular.
Develop and optimize data access and database operations, including query and performance optimization.
Conduct performance testing and tuning to improve application scalability, responsiveness, and reliability.
Implement and enhance application security, including authentication, authorization, and secure API practices.

Must Haves:

Modernization & Legacy Transformation Experience: Demonstrated experience decomposing monolithic applications into modular services, APIs, or microservices. Experience developing modernization roadmaps and executing phased migrations with minimal business disruption.
.NET Core / Backend Engineering Expertise: Advanced expertise in ASP.NET Core, REST API development, dependency injection, authentication/authorization, performance optimization, and enterprise application architecture.
Angular Front-End Development Expertise: Experience designing and developing Angular applications, component-based architecture, state management, responsive UI design, and integration with REST services.
Solution Architecture & Design Skills: Ability to design scalable, maintainable, secure, and loosely coupled solutions. Experience with DDD, API-first design, event-driven architecture, integration patterns, and modular architecture.

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More about this job

Responsibilities

Design, develop, and maintain enterprise applications while modernizing legacy .NET systems to modern Azure-based platforms. Collaborate with cross-functional teams to implement secure REST APIs, optimize database performance, and support DevOps processes.

Requirements

Requires over 10 years of experience in C#/.NET development, REST API security, and front-end development with Angular. Candidates must demonstrate expertise in legacy application modernization, Azure cloud services, and database performance tuning.

Skills

C#
.NET Core
ASP.NET
AngularJS
Angular
REST APIs
SQL Server
Azure
Azure DevOps
CI/CD
Multithreading
T-SQL
JWT
OAuth2
Software Architecture
Agile

Visa sponsorship

Not detected in the job text

Keywords

C#
.NET Core
ASP.NET Framework
AngularJS
Angular
REST APIs
JWT
OAuth2
Azure App Service
Azure SQL
SQL Server
T-SQL
Azure DevOps
CI/CD
Git
Multithreading
Microservices
DDD
API-first design
Event-driven architecture
Agile
Scrum
Performance tuning
Legacy modernization
Infrastructure as Code
Containerization
KQL
Postman
Swagger
IIS

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