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# Full-Stack Developer React.js, Node.js & FlutterNexvoria Technologies is hiring a Full-Stack Developer with mobile application development experience to work on KINVIYOTM. The role requires hands-on experience with React.js, TypeScript, Node.js, REST APIs and PostgreSQL, along with Flutter/Dart experience for Android and iOS. You will take ownership of features across web, backend, database and mobile applications from requirement to production.Full-timeGurugram, Haryana Work from Office24 Years1 position As per experience and technical competencyApply NowBack to All RolesAbout the RoleNEXVORIA TECHNOLOGIES PRIVATE LIMITED is looking for a hands-on Full-Stack Developer with Mobile Application Development experience to join our Product Engineering team in Gurugram.The selected candidate will primarily work on KINVIYOTM, our Family Awareness & Continuity Platform, across its Web Application, Backend APIs, Database and Android/iOS Mobile Application.This is an end-to-end product development role rather than a frontend-only, backend-only or mobile-only position.We are looking for a developer who can understand an existing production codebase, analyse business requirements, design technical solutions, develop features across multiple application layers, integrate APIs, troubleshoot issues independently and take ownership from development through testing and deployment.The candidate should have strong hands-on experience in full-stack web development using React.js, TypeScript and Node.js, along with practical mobile application development experience using Flutter and Dart.TECHNOLOGY ENVIRONMENTWEB FRONTEND React.js / React 19 TypeScript JavaScript TanStack Router / Query Tailwind CSS shadcn/ui HTML5 / CSS3 Responsive Web DevelopmentBACKEND Node.js Express.js REST APIs Authentication & Authorisation API Validation Error Handling Application LoggingDATABASE PostgreSQL SQL Relational Database Design Joins, Indexes, Constraints and Query OptimisationMOBILE APPLICATION Flutter Dart Android & iOS REST API Integration Firebase Push Notifications Local & Secure Storage State Management Mobile Application Debugging Play Store / App Store DeploymentDEVELOPMENT & INFRASTRUCTURE Git / GitHub Linux Azure / Cloud Environment Development, Staging and Production Environments Deployment & Production TroubleshootingThe ideal candidate should be capable of understanding how the web application, mobile application, backend APIs and database interact as one product ecosystem.You should be comfortable receiving a business requirement, understanding its impact across the existing system, designing the solution, implementing it, testing it and preparing it for production.We value strong engineering fundamentals, ownership, problem-solving ability, clean code and accountability over simply completing assigned tickets.What You'll Do* Develop, maintain and enhance the KINVIYOTM web and mobile applications.* Work across frontend, backend, database and mobile application layers.* Build responsive and reusable web interfaces using React.js and TypeScript.* Develop and maintain backend APIs using Node.js and Express.js.* Design, maintain and optimise PostgreSQL databases.* Develop and maintain Flutter applications for Android and iOS.* Build responsive, reusable and scalable Flutter UI components.* Integrate Web and Mobile applications with REST APIs.* Implement authentication, authorisation and role-based access controls.* Integrate Firebase services including push notifications, Crashlytics and Analytics where required.* Implement secure local storage and application data handling.* Work with Flutter state management solutions such as Riverpod, Provider, BLoC or equivalent.* Develop features involving dashboards, family data, documents, notifications, subscriptions and other product modules.* Handle file and document upload/retrieval workflows securely.* Integrate email, notification, payment/subscription and third-party services.* Understand and safely modify an existing production codebase.* Debug frontend, backend, API, database and mobile application issues independently.* Diagnose and resolve application crashes and production issues.* Perform root-cause analysis rather than applying temporary fixes.* Optimise web and mobile application performance, responsiveness and reliability.* Write clean, modular, reusable, maintainable and testable code.* Implement proper validation, exception handling and application logging.* Use Git/GitHub and follow appropriate branching, pull request and code review practices.* Work across Development, Staging and Production environments.* Participate in web and mobile application deployment and release processes.* Assist with Google Play Store and Apple App Store releases and updates.* Translate business requirements into technically sound implementations.* Estimate development
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In your interview, expect this: 'Walk me through the last time you had to debug something that took you more than an hour. What was it, what did you try first, and what would you do differently?' Hiring managers ask this to see if you think systematically or just try random fixes. Have a real example ready with specifics.