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Hi, I'm Hassan Ul Haq, a Flutter developer and software engineer based in Karachi, Pakistan. I design and build cross-platform mobile apps for iOS and Android with a focus on clean architecture, scalable solutions, and delightful user experiences. With 2+ years of experience, I work across frontend and backend stacks, integrate REST APIs and Firebase, and collaborate with teams to deliver robust software. I enjoy turning complex requirements into maintainable code and continuously improving performance.…Hi, I'm Hassan Ul Haq, a Flutter developer and software engineer based in Karachi, Pakistan. I design and build cross-platform mobile apps for iOS and Android with a focus on clean architecture, scalable solutions, and delightful user experiences. With 2+ years of experience, I work across frontend and backend stacks, integrate REST APIs and Firebase, and collaborate with teams to deliver robust software. I enjoy turning complex requirements into maintainable code and continuously improving performance.

Hassan Ul Haq

Programmer, App Developer, Full Stack Developer, +4

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Hi, I'm Hassan Ul Haq, a Flutter developer and software engineer based in Karachi, Pakistan. I design and build cross-platform mobile apps for iOS and Android with a focus on clean architecture, scalable solutions, and delightful user experiences. With 2+ years of experience, I work across frontend and backend stacks, integrate REST APIs and Firebase, and collaborate with teams to deliver robust software. I enjoy turning complex requirements into maintainable code and continuously improving performance.…Hi, I'm Hassan Ul Haq, a Flutter developer and software engineer based in Karachi, Pakistan. I design and build cross-platform mobile apps for iOS and Android with a focus on clean architecture, scalable solutions, and delightful user experiences. With 2+ years of experience, I work across frontend and backend stacks, integrate REST APIs and Firebase, and collaborate with teams to deliver robust software. I enjoy turning complex requirements into maintainable code and continuously improving performance.

Available to hire

Hi, I’m Hassan Ul Haq, a Flutter developer and software engineer based in Karachi, Pakistan. I design and build cross-platform mobile apps for iOS and Android with a focus on clean architecture, scalable solutions, and delightful user experiences.

With 2+ years of experience, I work across frontend and backend stacks, integrate REST APIs and Firebase, and collaborate with teams to deliver robust software. I enjoy turning complex requirements into maintainable code and continuously improving performance.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Urdu

Fluent

English

Advanced

Work Experience

Software Engineer at Decibel HRMS

August 1, 2024 - Present

Built responsive applications with custom widgets and applied state management techniques including BLoC, GetX, and Provider. Integrated REST APIs and implemented local storage solutions using SharedPreferences, SQLite, and Hive. Developed and maintained backend systems using C#, ASP.NET MVC, and multiple SQL databases such as MySQL and SQL Server. Improved application performance through code refactoring and the effective use of third-party packages. Collaborated on projects with teams using Git, GitHub, Bitbucket, and Jira, applying MVC and MVVM architectures.

Software Engineer (Flutter) at Rholab Interactive

August 1, 2024 - August 27, 2025

Built and published real-world apps featuring responsive UIs and utilized state management approaches like BLoC, GetX, and Provider. Implemented local storage and integrated APIs along with Firebase services. Followed clean architecture principles such as MVC and Clean. Managed source control with Git and handled Play Store deployments.

Flutter Trainer at Aptech

April 1, 2024 - August 27, 2025

Guided students through Flutter app development using Dart with emphasis on Agile practices, state management, and code reusability for both iOS and Android platforms. Explained integration of APIs and Firebase services including Firestore and Authentication. Taught Git and GitHub usage for version control and collaborative development.

Junior Flutter Developer at Blocship

March 1, 2023 - August 27, 2025

Designed and developed pixel-perfect UIs with Flutter implementing state management using BLoC and clean architecture. Integrated RESTful APIs, Firebase services, and local storage via SharedPreferences with efficient JSON parsing.

Software Engineer at Decibel HRMS

August 1, 2024 - Present

Built responsive applications with custom widgets and applied state management (BLoC, GetX, Provider). Integrated REST APIs and implemented local storage (SharedPreferences, SQLite, Hive). Developed and maintained backend with C#, ASP.NET MVC, and SQL databases (MySQL, SQL Server). Improved performance through code refactoring and third-party packages. Collaborated using Git/GitHub/Bitbucket, Jira, and applied MVC & MVVM architectures.

Software Engineer (Flutter) at Rholab Interactive

August 1, 2024 - October 16, 2025

Built and published real-world apps with responsive UIs, state management (BLoC, GetX, Provider), Local Storage and API/Firebase integration. Implemented clean architectures (MVC, Clean). Collaborated using Git and deployed applications to the Play Store.

Flutter Trainer at Aptech

April 1, 2024 - October 16, 2025

Guided Flutter app development with Dart, emphasizing Agile practices, state management, and code reusability for iOS & Android. Integrated APIs and Firebase services (Firestore, Authentication) for seamless app functionality. Instructed on Git/GitHub for version control and collaborative development.

Junior Flutter Developer at Blocship

March 1, 2023 - October 16, 2025

Designed and developed pixel-perfect UIs with Flutter, implementing state management (BLoC) and clean architecture. Integrated RESTful APIs, Firebase services, and local storage (SharedPreferences) with efficient JSON parsing.