RQ00788 - Software Developer - Full Stack - Senior

Zohorecruit; Toronto; On-site; CAD 120,000 - 160,000; Full time

Job summary

Zohorecruit in Toronto, Ontario is seeking a Senior Software Developer for full-stack work. You will modernize legacy .NET apps, design secure REST APIs, and build responsive UIs using Angular. You’ll work with Azure services, DevOps practices, and database tuning to deliver scalable solutions.

The role emphasizes collaboration with architects, QA, and business stakeholders, guiding modernization efforts and delivering secure, high-performance software across cloud and on-prem environments.

Qualifications

• 10+ years of hands-on enterprise app development.
• Experience modernizing legacy .NET apps.
• Strong REST API design, security and auth.

Responsibilities

• Develop and integrate REST APIs and modernize legacy .NET Framework, WCF, Windows Services, and Windows Forms apps.
• Build responsive web UIs and implement JWT/OAuth2 authentication.
• Develop high-performance, multithreaded, and asynchronous applications.
• Configure and support Azure cloud services (App Services, Azure SQL, Storage, Event Hub, ADX, Key Vault, Metrics).
• Develop and optimize SQL Server databases with complex queries and indexing.
• Perform testing, production troubleshooting, and performance tuning across layers.
• Support DevOps and CI/CD with Azure DevOps and Git-based source control.
• Conduct code reviews and ensure secure, maintainable software.
• Collaborate with architects, QA, infra, and stakeholders on design and delivery.
• Migrate legacy systems to modern Azure platforms.

Skills

C#

REST API

ASP.NET Core

Angular

SQL Server

Azure

Multithreading

Security

DevOps

Testing

Tools

Azure DevOps

GitHub

Azure Repos

CI/CD pipelines

Job description

RQ00788 - Software Developer - Full Stack - Senior

Job Information

Term 250 Days

Work Experience 10+ Years

City Toronto

State/Province Ontario

M4C

Technology

Job Description

Responsibilities:

• 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:

• 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
• Microsoft SQL Server & Database Development
• Strong T-SQL development skills, including stored procedures, views, triggers, indexing, query optimization, execution plans, and database performance tuning.
• 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.
• 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

• 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.