Job Title: Senior .NET / Mobile Application Developer

Location: Toronto, ON

Work Arrangement: Onsite – 5 Days a Week

Contract Duration: 16 Months

We are looking for an experienced Senior Software Developer to design, develop, implement, and maintain complex applications in a multi-platform environment.

The ideal candidate will have strong experience in cross-platform mobile application development, along with expertise in technologies such as Ionic, Cordova, Flutter, .NET, C#, JEE, Microsoft SQL Server, JavaScript frameworks, and Azure Cloud services.

The candidate will be responsible for developing scalable applications, enhancing existing features, integrating APIs, troubleshooting technical issues, and ensuring high-quality software delivery throughout the Software Development Life Cycle (SDLC).

Must-Have Skills

1. Cross-Platform Mobile App Development

- 5+ years of experience with cross-platform mobile application development.

- Hands-on experience with Ionic Framework, Cordova plugins, Google Flutter, or equivalent technologies.

2. Application Development
- 5+ years of experience designing, developing, and implementing complex interactive applications in a multi-platform environment.

- Experience with .NET, C#, JEE, Microsoft SQL Server, and JavaScript frameworks.

- Strong understanding of SOAP and REST web services.

Technical Skills & Requirements

Development Skills
- Experience with Azure Cloud services, including:
- Azure SQL

- Azure Functions

- API Management

- Streaming Analytics

- Event Hub

- Data Factory / Databricks

- Experience with XHTML, HTML5, JavaScript, jQuery, and AngularJS.

- Ability to develop web applications, web services (SOAP and REST), and Windows client applications.

- Experience developing and integrating APIs.

- Familiarity with Swagger, OpenAPI,



Postman, and Apigee.

- Experience with multithreaded applications, Dependency Injection (IoC) frameworks, and concurrency patterns.

- Experience with code refactoring and optimization.

- Strong knowledge of object-oriented programming, design patterns, and architectural patterns.

- Ability to develop scalable applications using software design best practices.

Technical Skills
- Experience across the Software Development Life Cycle (SDLC) and Application Lifecycle Management.

- Experience with unit, performance, and load testing.

- Ability to translate business requirements into technical solutions.

- Knowledge of CI/CD pipelines and DevOps practices.

- Understanding of UI/UX design principles.

- Knowledge of security concepts, including authentication, authorization, encryption, digital signatures, PKI, and SSL.

- Experience with OAuth, JWT, SAML, OIDC, and Mutual TLS.

- Experience with version control systems such as Git.

- Troubleshooting, incident resolution, and post-implementation support experience.

Key Responsibilities

- Review existing application code and architecture and implement improvements to ensure modularity and scalability.

- Develop enhancements to existing features and build new features based on approved requirements.

- Translate technical specifications into functional and tested applications.

- Develop detailed programming specifications and write,



maintain, and test code.

- Provide realistic development estimates to support project planning.

- Capture business requirements and update business rules accordingly.

- Follow structured development methodologies and software design best practices.

- Create custom reports using Microsoft technologies.

- Conduct application testing, integration, and deployment.

- Identify, analyze, and recommend solutions for production defects.

- Troubleshoot technical issues related to software implementation, conversion, and migration.

- Maintain clear technical documentation.

- Support the transition of developed applications to full time resources.

General Skills

- Strong programming, analytical, and problem-solving skills.

- Experience working throughout the complete SDLC.

- Knowledge of Agile methodologies.

- Experience with object-oriented analysis and design.

- Strong communication and interpersonal skills.

- Ability to collaborate with technical teams and business stakeholders.

- Ability to manage multiple projects and meet deadlines.

- Experience working in large and complex environments.

Additional / Desirable Skills

- Experience developing internet-ready applications.

- Knowledge of Rapid Application Development (RAD) methodologies.

- Understanding of Information Management principles and practices.

- Experience with middleware and gateways.

- Experience reviewing and modifying product installation scripts.

- Ability to provide post-implementation support.

- Experience conducting design walkthrough sessions.

- Knowledge of Accessibility for Ontarians with Disabilities Act (AODA) and related standards.

- Ability to prepare user and system documentation.

📌 Senior .NET / Mobile Application Developer (Toronto)
🏢 I8IS
📍 Toronto