Appfabs Incorporation
Website:
appfabs.ca
Job details:
Position Overview
We are seeking a Senior Full Stack Developer with strong hands-on experience in frontend development using React and TypeScript and backend development using .NET/C#. The ideal candidate should have practical experience developing and integrating REST APIs, building scalable frontend applications, implementing automated tests, and working with modern frontend and backend architectures.
The role requires strong problem-solving and debugging capabilities, effective collaboration with cross-functional teams, ownership of feature development and bug fixing, and the ability to work effectively in fast-paced development environments using modern engineering and AI-assisted development practices.
Key Responsibilities
• Design, develop, test, and maintain full-stack applications using React/TypeScript and .NET/C#.
• Develop responsive, reusable, and high-performance frontend features using React and TypeScript.
• Develop and integrate REST APIs and backend services using .NET/C#.
• Implement state management and application workflows using Redux / Redux Toolkit or equivalent patterns.
• Write and maintain automated unit and component tests using Jest and React Testing Library or equivalent testing libraries.
• Investigate and resolve functional, integration, and production issues across frontend and backend components.
• Collaborate with QA, product, DevOps, and other engineering teams throughout the development lifecycle.
• Participate in code reviews and follow Git-based development, CI/CD, coding standards, and secure development practices.
Must Have Skills
Backend Development (Critical)
• 3+ years of backend development experience in.NET / C# (ASP.NET Core 6+)
• Strong experience in developing REST APIs, streaming endpoints (SSE/WebSockets), and asynchronous programming
• Hands-on experience with HttpClient, dependency injection, middleware, and request/response pipelines
• Experience with service-oriented architecture and integration patterns including circuit breakers, retries, and timeouts
• Knowledge of cancellation tokens, task orchestration, and background processing
• Strong understanding of error handling, structured logging (ILogger), and diagnostics
Frontend Development
• 3+ years of frontend development experience using React and TypeScript
• Experience with state management libraries such as Redux / Redux Toolkit or equivalent
• Strong understanding of modern JavaScript/TypeScript tooling and testing including Webpack, Jest, React Testing Library, ESLint, npm, and yarn
Preferred Skills
• Experience with real-time data streaming technologies such as SSE, SignalR, and WebSockets
• Knowledge of Microsoft Azure services including App Service, API Management, Application Insights, and Service Bus
• Experience working with HttpClient factories, Polly resilience patterns, and application health checks
General Qualifications
• Familiarity with Git-based workflows, code reviews, and CI/CD pipelines
• Practical experience using AI coding assistants such as Claude / Co-Pilot in day-to-day development, including code generation, debugging, refactoring, test generation, and code analysis
• Strong debugging, analytical, and troubleshooting skills for distributed systems
• Ability to work collaboratively within cross-functional teams
• Good communication and problem-solving skills
Educational Qualification:
Bachelor’s or Master's degree in Computer Science, Information Technology, or a related field (or equivalent experience).
Preferred Technical Expertise
• Service-oriented and scalable application architecture
• Distributed systems and asynchronous communication
• API integrations and middleware handling
• Performance optimization and diagnostics
Technology Stack
.NET / C# • ASP.NET Core • React • TypeScript • Redux / Redux Toolkit • REST APIs • Git • CI/CD • Webpack • Jest • React Testing Library • ESLint • npm • yarn
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