Muhammad Umair

Muhammad Umair - |- SUMMARY A highly experienced mobile developer with over a decade of expertise in designing, developing, and deploying innovative applications across a variety of platforms. My technical proficiencies span iOS, Android, and cross-platform development using Flutter, as well as advanced tools and frameworks like Swift, SwiftUI, Combine, RxSwift, and MVVM. I have a strong focus on creating secure, high-performance, and user-friendly solutions, with specialization in sectors such as FinTech, Healthcare, Health & Fitness, FoodTech, and Social Networking Apps. Whether leading development teams or working as an independent contributor, I am passionate about crafting seamless user experiences while adhering to the highest standards of code quality and security. EXPERIENCE Senior iOS Developer Feb 2023 - Present W1TTY  Spearheaded a complete overhaul of the app architecture, transitioning from a monolithic to a modular structure. This shift improved codebase scalability, enhanced project organization, and facilitated independent module development, leading to a 25% reduction in overall development costs by optimizing the team's workflow.  Significantly improved development cycles by reducing build times from 7 minutes to just 15 seconds. This was achieved through meticulous refactoring, optimized dependency management, and implementing advanced caching mechanisms, boosting productivity and enabling faster iteration of features and fixes.  Utilized Firebase Crashlytics and Xcode Instruments to identify crash patterns and critical issues. Implemented rigorous errorhandling mechanisms and stability improvements, reducing app crashes by 50%, resulting in a more reliable and stable app experience.  Delivered key user-centric features such as enhanced financial dashboards, personalized recommendations, and real-time notifications, resulting in a 20% increase in user engagement. These enhancements also contributed to improved App Store ratings and user retention.  Acted as a mentor for junior developers, conducting in-depth code reviews, promoting best practices, and guiding the team in adopting design patterns like MVVM-C and MVI. Fostered a culture of continuous learning and collaboration within the team, driving overall code quality improvements.  Worked in Agile environments, leading sprint planning, retrospectives, and daily stand-ups. Collaborated closely with UX/UI designers, backend engineers, and product managers to ensure timely and successful feature rollouts aligned with business goals.  Established and maintained CI/CD pipelines using Jenkins and Fastlane, automating build, test, and deployment processes. This streamlined the app's release cycle, allowing for frequent updates and continuous integration of new features without manual intervention.  Ensured high code quality through Test-Driven Development (TDD) principles, creating automated test suites with XCTest and XCUITest. Implemented comprehensive unit, integration, and UI testing strategies to detect issues early, ensuring minimal bugs in production.  Led the app deployment process on the App Store, managing version releases, tracking user feedback, and optimizing metadata for better visibility. Monitored app performance and ratings, and responded to user feedback to drive continuous improvement.  Identified performance bottlenecks using Xcode Instruments, reducing memory leaks and optimizing app performance. Improved app launch time and responsiveness, contributing to a seamless user experience.  Integrated with RESTful APIs and GraphQL to sync financial data in real-time. Managed complex data flows using Combine and RxSwift, ensuring efficient data handling and responsiveness throughout the app. Tech Stacks: Swift, Objective-C, SwiftUI, UIKit, Combine, RxSwift, CoreData, CoreML, HealthKit, AVFoundation, MVVM, Modular Architecture, Clean Architecture, Xcode, Git, Jenkins, Fastlane, Firebase (Crashlytics, Analytics, Performance Monitoring), RESTful APIs, GraphQL, Alamofire, CoreData, Realm, XCUITest, XCTest, Test-Driven Development (TDD), Behavior-Driven Development (BDD), Agile Methodologies (Scrum), Continuous Integration/Continuous Deployment (CI/CD), FinTech, Healthcare, Security, Performance Optimization, Data Privacy (GDPR), User Engagement Principal Software Engineer Oct 2021 - Feb 2023 Digitify • Spearheaded the complete development lifecycle of key features for YAP-PK, successfully launching MVP 1.0 on schedule. Collaborated with Product Owners to gather and clarify requirements, translating them into actionable technical specifications. Utilized Agile methodologies to facilitate regular updates and feedback loops with stakeholders, ensuring the product met user needs and expectations. • Integrated biometric authentication (Face ID/Touch ID) and multi-factor authentication to safeguard sensitive financial data. • Championed initiatives to enhance code quality through rigorous code reviews and implementing coding standards. Utilized static code analysis tools to identify vulnerabilities and code smells, leading to the establishment of a cleaner, more efficient codebase. Resolved critical issues that affected performance and reliability, contributing significantly to a robust software solution. Maintained a high level of code documentation to ensure maintainability and knowledge transfer within the team. • Acted as a point of contact for high-priority issues, leveraging deep technical expertise to troubleshoot complex problems. Facilitated collaborative problem-solving sessions with development teams, achieving a 90% resolution rate for critical blockers. Developed a systematic approach to issue tracking and resolution that minimized downtime and improved team morale. • Designed and implemented a modular architecture using private CocoaPods, promoting the separation of functionalities into distinct modules. This strategic change improved the maintainability of the codebase and allowed for more straightforward integration of new features. By enabling code reuse across various components, the team was able to accelerate development timelines and reduce redundancy. • Led efforts to fortify application security by integrating advanced encryption protocols and enhancing data protection measures. Conducted security audits to identify vulnerabilities and implemented best practices, leading to a 50% reduction in security incidents. Collaborated with compliance teams to ensure that the application met industry standards and regulatory requirements. • Provided mentorship to junior developers, fostering a culture of continuous learning and improvement. Conducted workshops on best practices, design patterns, and modern development tools, resulting in a more skilled and confident team. Encouraged knowledge sharing through regular lunch-and-learn sessions, enhancing team cohesion and productivity. • Collaborated closely with UX/UI designers, Quality Assurance (QA) teams, and DevOps engineers to ensure a smooth integration of features and effective testing processes. Actively participated in Agile ceremonies such as sprint planning, daily stand-ups, and retrospectives to ensure project alignment with business objectives and continuous improvement of team practices. • Established and maintained CI/CD pipelines to streamline the build and deployment processes, improving the efficiency of releases. Utilized tools such as Jenkins and Fastlane to automate testing, build, and deployment tasks, ensuring highquality releases with minimal manual intervention. Tech Stacks: Swift, Objective-C, Kotlin, SwiftUI, UIKit, Combine, RxSwift, Alamofire, Modular Architecture, MVVM, Clean Architecture, Xcode, Git, Jenkins, Firebase, CocoaPods, Fastlane, XCTest, Crashlytics, Advanced Encryption, Biometric Authentication (Face ID/Touch ID), GDPR Compliance, Test-Driven Development (TDD), Agile Methodologies (Scrum), CI/CD Principal Software Engineer Feb 2018 - Oct 2021 The ENTERTAINER • Led the transition from a monolithic architecture to a custom modular architecture, significantly enhancing the scalability and maintainability of core applications. This strategic shift allowed for more efficient development cycles and easier integration of new features across various platforms. • Single-handedly designed and implemented critical features, including a comprehensive delivery module and a sophisticated hotel reservation system, seamlessly integrating them into both core and white-label applications. This involved extensive collaboration with cross-functional teams to ensure alignment with business objectives and customer requirements. • Played a pivotal role in fortifying app security, implementing encryption protocols, and ensuring data security measures in line with GDPR standards. • Championed efforts to bolster application security by implementing advanced encryption techniques to protect sensitive user data. Conducted regular security assessments and audits, ensuring compliance with industry standards and reducing the risk of data breaches. • Successfully developed the Pockiit app in under two weeks, demonstrating exceptional time management and prioritization skills. This achievement showcased the ability to deliver high-quality software under tight deadlines while maintaining a focus on user needs and functionality. • Collaborated with UX/UI designers to enhance the application’s user interface and experience through innovative ideas and engaging animations. These enhancements significantly improved user engagement metrics, resulting in increased customer satisfaction and retention. • Worked closely with Product Managers, Designers, and Quality Assurance teams to gather requirements and ensure the successful delivery of features. Actively participated in sprint planning, daily stand-ups, and retrospectives to foster a collaborative team environment. • Provided mentorship to junior developers, offering guidance on best practices, coding standards, and the latest industry trends. Facilitated knowledge-sharing sessions to elevate the technical capabilities of the team, promoting a culture of continuous learning. • Analyzed application performance metrics and implemented optimization strategies to enhance loading times and responsiveness. Utilized profiling tools to identify bottlenecks and reduce app crashes, improving overall application stability. Tech Stacks: Swift, Objective-C, Kotlin, UIKit, SwiftUI, Alamofire, Modular Architecture, MVVM, VIPER, Xcode, Git, Jenkins, CocoaPods, Fastlane, Firebase, Crashlytics, Figma, Adobe XD, AES Encryption, OAuth2, GDPR Compliance, Agile (Scrum), Test-Driven Development (TDD), Continuous Integration/Continuous Deployment (CI/CD) Technical Lead June 2017 - Feb 2018 SolutionDots Systems • Restructured the iOS development team by revising the team’s workflow, introducing best coding practices, and mentoring junior developers, leading to a 20% increase in project delivery speed and better collaboration across the team. • Defined clear project milestones and established agile processes, improving project tracking and reducing delays by 25%. This enhanced transparency and accountability within the team, ensuring that project deadlines were consistently met. • Led the end-to-end development of a fully functional e-commerce application, delivering the project within one month. The app included a wide range of features such as product listings, real-time inventory updates, a secure payment gateway, and customer support. This rapid development cycle demonstrated strong problem-solving abilities and adherence to tight schedules. • Spearheaded the implementation of new functionalities in the HRM module of the company’s ERP product, such as payroll processing, leave management, and employee self-service features. These enhancements optimized the HR workflows for clients, significantly improving their operational efficiency. • Collaborated extensively with cross-functional teams, including UI/UX designers, backend engineers, and QA teams, to align development efforts with business goals. This collaboration helped in delivering a cohesive product that met both technical and user experience standards. • Conducted regular code reviews, ensuring high code quality, adherence to coding standards, and optimization for performance and scalability. Introduced automated testing frameworks that reduced manual testing efforts and improved overall code reliability. • Implemented Agile methodologies, including Scrum and Kanban, to streamline development cycles and foster a collaborative work environment. Facilitated daily stand-ups, sprint planning, and retrospective meetings, driving continuous improvement and faster product iterations. • Handled high-priority bug fixes and resolved critical performance issues in live applications. Reduced app downtime and crashes by identifying bottlenecks and optimizing the codebase, resulting in higher user satisfaction and app reliability. • Provided technical leadership and mentorship to the team, fostering a culture of learning and continuous improvement. Ensured that all team members were up-to-date with the latest iOS development trends and tools, boosting overall team performance. • Utilized modern tools and platforms like Xcode, Jenkins, and Git to streamline the development pipeline, automate testing and deployment processes, and ensure smooth continuous integration and delivery (CI/CD). Tech Stacks: Swift, Objective-C, Kotlin, Java, JavaScript, HTML/CSS, Python, SQL, C#, XML, SwiftUI, UIKit, Flutter, CoreData, Combine, RxSwift, CocoaPods, Alamofire, MVVM, MVC, TDD, OOP, Functional Programming, Modular Architecture Senior Software Engineer April 2015 - June 2017 Technosoft Solutions • Managed HIPAA compliance for multiple healthcare-related applications, ensuring that all user data and sensitive information were secure and fully adhered to regulatory requirements. Conducted regular audits and security reviews to maintain compliance and safeguard patient information. • Integrated FHIR (Fast Healthcare Interoperability Resources) protocol into healthcare apps, facilitating seamless data exchange between healthcare systems. This integration enabled healthcare providers to offer more efficient and reliable digital solutions for patient management. • Led the integration of Apple HealthKit, enhancing the health and fitness tracking capabilities of the apps. This feature allowed users to sync their health data from various wearable devices and iOS applications, creating a more comprehensive health profile. • Pioneered Swift development for new projects, adopting Swift as the primary language for iOS applications. This transition led to more efficient coding practices, reduced development time, and easier maintenance for future projects. • Developed and integrated communication features using WebRTC APIs, enabling high-quality video and audio communication within applications. This resulted in enhanced user interaction for apps in domains such as healthcare, telemedicine, and fitness. • Collaborated with cross-functional teams, including backend developers, UI/UX designers, and product managers, to ensure that projects were delivered according to specifications and timelines. Helped define technical requirements and contributed to project planning. • Worked on implementing secure video conferencing and messaging features within healthcare apps, ensuring both functionality and HIPAA compliance for sensitive communication between patients and doctors. • Provided mentorship and training to junior developers, improving overall team performance. Conducted code reviews and introduced best coding practices, focusing on clean, scalable, and maintainable codebases. • Designed and implemented data storage solutions, utilizing CoreData and Firebase for local and cloud storage. These solutions supported real-time data synchronization and retrieval, improving app responsiveness and user experience. • Enhanced app performance through rigorous testing, optimization, and refactoring of existing codebases. Improved app stability, reduced crashes, and ensured smooth operation across different iOS versions. Tech Stacks: Swift, Objective-C, Kotlin, Java, JavaScript, HTML/CSS, Python, SQL, C#, XML, SwiftUI, CoreData, Combine, CocoaPods, Alamofire, MVVM, MVC, TDD, OOP, Apple HealthKit, FHIR API, WebRTC, RESTful APIs iOS Developer March 2013 - April 2015 Fourspan Technologies • Designed and developed advanced iOS applications from the ground up, working closely with cross-functional teams, including designers, product managers, and backend developers. Ensured seamless integration between frontend and backend services, contributing to smooth and timely project delivery. • Collaborated with the UI/UX team to create intuitive and visually appealing interfaces, focusing on user experience and performance optimization. Applied best practices in design to ensure high-quality and responsive iOS apps across a variety of screen sizes and iOS versions. • Conducted thorough unit testing to ensure the robustness of the codebase, focusing on edge cases, performance, and usability. This rigorous testing process reduced app crashes and enhanced the overall stability and reliability of the applications. • Implemented new technologies and frameworks to maximize app performance and user satisfaction, ensuring apps were always up to date with the latest industry standards. Integrated new iOS features like Touch ID, Push Notifications, and Location Services to improve app functionalities. • Utilized Objective-C and Swift to build applications with a focus on maintainability and scalability. Transitioned older codebases from Objective-C to Swift, enhancing development efficiency and future-proofing applications. • Managed app releases to the App Store, ensuring apps met all submission requirements and were fully optimized for the latest iOS releases. Regularly updated apps to support new iOS versions, resolving compatibility issues. • Worked with third-party APIs and SDKs to integrate additional services into applications, including social media sharing, payment gateways, and analytics tools. • Collaborated with project managers to gather and analyze requirements, defining technical specifications and timelines for iOS development projects. • Troubleshot and debugged issues in live environments, providing timely solutions to ensure uninterrupted app performance. Implemented crash reporting tools to monitor app health post-release and reduce critical bugs. • Assisted in improving existing codebases, refactoring code to enhance performance and maintainability. Applied design patterns such as MVC and Singleton to ensure clean, modular, and reusable code. Tech Stacks: Objective C, Java, HTML, CSS, Python, SQL, MVC, Functional Programming EDUCATION Bachelor of Science: Computer Science COMSATS Institute of Information and Technology - SKILLS • Languages: Swift, Objective-C, Kotlin, JavaScript, TypeScript • Frameworks: UIKit, SwiftUI, Flutter, Combine, RxSwift, Alamofire, CoreML, HealthKit • Paradigms: Object-Oriented Programming (OOP), Functional Programming, Model-View-ViewModel (MVVM), Modular Architecture, Test-Driven Development (TDD), Reactive Programming, Event-Driven Programming, Design Patterns (Singleton, Factory, Observer, Strategy, Dependency Injection) • Platforms: iOS, Android, WatchOS, tvOS , macOS, CrossPlatform Development, Web Development, Server-Side Development, IoT Platforms • Tools: Xcode, Android Studio, Visual Studio Code, IntelliJ IDEA, Git (GitHub, GitLab, Bitbucket), Jenkins, Fastlane, Firebase, Postman, JIRA, Confluence, Docker, Kubernetes, Slack, Notion (for documentation and project management), Figma, IBM Watson, Jira, Confluence, Slack • Libraries/APIs: CocoaPods, Carthage, Realm, Core Data, UserNotifications, CloudKit, Stripe API, Google Maps API, Facebook SDK, Twitter API, OpenCV, Firebase Authentication, Firebase Cloud Messaging (FCM), Socket.IO (for real-time communication), GraphQL (Apollo Client) • Storage: Firebase Realtime Database, SQLite, Core Data, UserDefaults, Cloud Storage (AWS S3, Azure Blob Storage), NoSQL Databases (MongoDB, Couchbase, DynamoDB), GraphQL (for data queries), Redis (for caching), ElasticSearch (for searching and indexing) • Other: Agile Methodologies (Scrum, Kanban), Continuous Integration/Continuous Deployment (CI/CD), Security Protocols (AES Encryption, OAuth2, SSL/TLS), Performance Profiling Tools (Instruments, Xcode Profiler), UI/UX Design (Figma, Adobe XD, Sketch, InVision), App Store Deployment and Management, Localization and Internationalization, Accessibility Best Practices, API Design and Development (RESTful APIs), Documentation Best Practices (Markdown, Doxygen), Dependency Management (using Swift Package Manager), Unit Testing and UI Testing Frameworks (XCTest, Quick/Nimble)