Gul Hassan

Backend Developer

Xfinitive Technology • Full-time

Jun 2025 - Present • 11 mos

Worked as a Python Backend and AI Developer, focusing on building scalable APIs and intelligent chatbot systems. Key Responsibilities & Achievements: Developed high-performance backend APIs using FastAPI and Flask. Built and deployed RESTful services for web and mobile applications. Designed and managed NoSQL databases using MongoDB. Integrated and customized Large Language Models (LLMs) for AI-powered chatbot solutions. Developed custom AI chatbots for business automation and conversational systems. Containerized applications using Docker for scalable and consistent deployment. Optimized backend performance and improved API response times. Structured projects using clean architecture principles for maintainability and scalability. Through this role, I gained hands-on experience in modern backend systems, AI integration, and production-level deployment environments.

Android Developer

Innovagic Technologies • Full-time

May 2024 - May 2025 • 1 yr

Worked as an Android Developer focused on building scalable, maintainable, and high-performance mobile applications. Key Responsibilities & Achievements: Developed and maintained Android mobile applications using Java and Kotlin. Implemented clean and structured backend logic for app functionality. Designed responsive and user-friendly interfaces using XML layouts. Managed local and cloud databases using SQL, Firebase, and Room Database. Applied MVVM architectural pattern to ensure clean code separation and efficient project scalability. Optimized app performance and improved code maintainability. Fixed bugs and enhanced existing features in production-level applications. Through this role, I strengthened my expertise in modern Android development practices, structured architecture, and real-world application deployment.

Android Developer

IIT • Part-time

Apr 2022 - May 2024 • 2 yrs 1 mo

Worked as a Software Engineer specializing in Android application development and database management. Key Responsibilities & Achievements: Developed and deployed 8+ Android applications using Java and Android SDK. Designed and implemented AI-based chatbot applications for institutional use. Built functional applications including School LMS, Restaurant Menu App, To-Do List App, and Digital Tasbeeh Counter. Integrated Firebase (Authentication, Realtime Database, Firestore) for secure and scalable backend solutions. Managed SQL databases for structured data storage and optimized query performance. Improved application performance, UI responsiveness, and overall user experience. Collaborated with development teams to deliver projects within deadlines. Maintained clean architecture and structured code for long-term scalability. During my tenure, I gained strong expertise in Android development lifecycle, database integration, API handling, and production-level application deployment.