Principal Software Engineer

Job Summary :

We are looking for an experienced Full Stack .NET Developer with strong hands-on expertise in .NET/.NET Core, React.js, and Playwright. The candidate will be responsible for designing, developing, testing, debugging, and maintaining scalable web applications and APIs.

Key Responsibilities :

.NET / Backend Development :

- Design, develop, and maintain enterprise applications using C# and .NET/.NET Core.

- Develop scalable and secure ASP.NET Core Web APIs and RESTful services.

- Implement business logic, validation, exception handling, logging, and authentication/authorization.

- Work with Entity Framework Core, LINQ, dependency injection, middleware, and asynchronous programming.

- Design reusable, maintainable, and testable backend components.

- Optimize application performance, scalability, and reliability.

- Troubleshoot production issues and perform root-cause analysis.

- Integrate applications with internal and external systems through REST APIs and other integration mechanisms.

- Apply clean coding practices and appropriate design patterns.

React Front-End Development :

- Develop responsive and user-friendly web applications using React.js.

- Build reusable React components and modular front-end architecture.

- Work with JavaScript/TypeScript, HTML5, CSS3, and modern React concepts.

- Implement state management, routing, form validation, API integration, and error handling.

- Integrate React applications with .NET REST APIs.

- Optimize front-end performance and application responsiveness.

- Ensure cross-browser compatibility and responsive behavior.

- Participate in UI development, code reviews, debugging, and performance improvements.

Playwright / Test Automation :

- Develop and maintain automated UI and end-to-end test frameworks using Playwright.

- Create reliable automated test cases covering critical application workflows.

- Automate functional, regression, integration, and smoke testing.

- Write Playwright tests using JavaScript/TypeScript.

- Implement reusable test utilities, fixtures, page objects, and test data.

- Execute tests across multiple browsers and environments.

- Analyze test failures, identify defects, and work with developers to resolve issues.

- Integrate Playwright automation into CI/CD pipelines.

- Maintain test scripts as application functionality evolves.

- Improve automation coverage and reduce manual regression-testing effort.

API & Integration :

- Design and consume RESTful APIs.

- Work with JSON, HTTP/HTTPS, authentication, authorization, and API error handling.

- Perform API testing and integration validation.

- Integrate front-end applications with backend services.

- Work with third-party APIs and enterprise integrations.

- Understand API versioning, security, performance, and scalability considerations.

Database Skills :

- Work with relational databases such as SQL Server.

- Write complex SQL queries, joins, stored procedures, functions, and views.

- Perform database design, data validation, and query optimization.

- Work with Entity Framework Core/ORM technologies.

- Troubleshoot database-related application issues and performance bottlenecks.

Software Engineering Practices :

- Follow SOLID principles, clean code, object-oriented programming, and design patterns.

- Participate in Agile/Scrum ceremonies including sprint planning, daily stand-ups, backlog refinement, demos, and retrospectives.

- Perform peer code reviews and maintain coding standards.

- Write unit, integration, and end-to-end tests.

- Participate in technical design and architecture discussions.

- Create technical documentation and maintain application documentation.

CI/CD & DevOps Exposure :

- Work with CI/CD pipelines for application build, testing, and deployment.

- Integrate Playwright automated testing into deployment pipelines.

- Work with tools such as Git, Azure DevOps/GitHub, Jenkins, or similar CI/CD platforms.

- Understand build management, version control, branching strategies, and release processes.

- Troubleshoot build and deployment failures.

- Exposure to Docker and cloud platforms such as Azure or AWS is an advantage.

Security :

- Implement secure coding practices across frontend and backend applications.

- Work with authentication and authorization mechanisms such as JWT, OAuth 2.0, and role-based access control.

- Understand common web application vulnerabilities such as OWASP Top 10.

- Ensure secure handling of user input, APIs, credentials, and sensitive information.

Required Technical Skills :

Backend :

- C#, .NET / .NET Core, ASP.NET Core, Web API / REST API, Entity Framework Core, LINQ, Dependency Injection, Async/Await, Object-Oriented Programming, Design Patterns.

Frontend :

- React.js, JavaScript / TypeScript, HTML5, CSS3, React Hooks, REST API Integration, Responsive Web Development.

Automation :

- Playwright, End-to-End Testing, UI Automation, Regression Testing, Cross-Browser Testing, Page Object Model, Test Fixtures, CI/CD Test Integration.

Database :

- SQL Server, SQL, Stored Procedures, Query Optimization, Entity Framework.

Tools :

- Git, Azure DevOps / GitHub, Postman, Visual Studio / VS Code, CI/CD tools.

Preferred Skills :

- Azure or AWS, Docker, Microservices architecture, TypeScript, Redis or caching technologies, Messaging technologies, Kubernetes, Automated API testing, Performance testing, Agile/Scrum methodology.

Soft Skills :

- Strong analytical and problem-solving skills.

- Excellent verbal and written communication.

- Strong collaboration and stakeholder-management skills.

- Ability to understand business requirements and convert them into technical solutions.

- Strong debugging and troubleshooting capability.

- Attention to detail, particularly in automated testing and defect identification.

- Ability to work independently as well as within a cross-functional team.

- Strong ownership and accountability for deliverables.

Ideal Candidate Profile :

The ideal candidate should have a balanced full-stack development and test-automation mindset, with strong expertise in : C#/.NET + ASP.NET Core + React + JavaScript/TypeScript + REST APIs + SQL + Playwright. The candidate should be capable of developing features end-to-end - from backend API and database development through React UI implementation and Playwright-based automated testing - while following modern software engineering and Agile practices.

Skills

Full Stack, .Net, .Net Core, React.js, C#, ASP, RESTful Webservices, LINQ, Entity Framework, Javascript, TypeScript