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HAFIZ KHAWAR

HUSSAIN

Chicago, Illinois, U.S.A

ad21aw@r.postjobfree.com / +1-681-***-****

SUMMARY

Versatile Full Stack and Mobile Application Developer with 5 years of experience in creating digital experiences. Proficient in both frontend and backend technologies. Additionally skilled in Android development, proficient in Java/Kotlin languages and the Android SDK. Successfully delivered innovative mobile applications adhering to best practices in UI/UX design, backend integration, and performance optimization. Adept at collaborating within agile teams, ensuring the seamless alignment between client objectives and technological solutions.

SKILLS

• Programming Languages

• Frontend Development

• Backend Development

• Database Management

• Version Control Systems

• Web Services and APIs

• Android/Spring Security

• Android SDK

• Testing and Debugging

• Mobile Application Development

• UI/UX Understanding

• Adaptability and Learning Agility

• Time Management

• Java/Kotlin Programming

• Documentation

• Project Management

TECHNICAL SKILLS

• Programming Languages: Java, Kotlin, C++, C#

• Frameworks: Spring, Express, Node, Flask, Android, NoSQL React Native

• Miscellaneous: Retrofit, LiveData, ViewModel, Moshi, GSON, SCRUM, SOLID Principles, LEAN code, OAuth, JWT, MVC, MVVM, Confluence, Jira, Trello, Click Up, SDLC, RESTful API, ORM, OOP, Microservices.

• Testing and Debugging: JUnit, Jest, PyTest, Selenium, Espresso, XCTest, Android Profiler, LeakCanary

• Version Control: Git, GitLab, Bitbucket

• DEs: IntelliJ IDEA, Eclipse, Android Studio, Xcode, Visual Studio Code ADT

• Database Query Languages: MySQL, GraphQL, SQLite, NoSQL, Room

• Cloud: AWS lambda, API Gateway, S3 Storage, EC2, Cognito, RDS, Athena, Firebase, FireCloud, FireStorage, FCM, Google Cloud Platform serverless computing, Docker, Kubernetes

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EXPERIENCE

FULL STACK DEVELOPER – Android Engineer / Islamic Food & Nutrition Council of America (IFANCA) - Des Plains, IL 07/2023 - Current

• Implemented Kotlin Coroutines for asynchronous programming, for improving the app's performance by handling long-running tasks, such as network calls and database operations, efficiently.

• Hands on experience in Kotlin Flow for data streams and ensuring smooth data synchronization across the app.

• Implementation of MVVM (Model-View-ViewModel) architecture.

• Worked on LiveData and Data Binding to create a reactive UI that automatically updates in response to data changes, minimizing the need for boilerplate code.

• Integrated Room for local data storage, providing an abstraction layer over SQLite.

• Employing complex SQL queries within Room to efficiently handle data related to Halal certificates and audit reports.

• Utilized Retrofit combined with OkHttp for network operations.

• Contributed in efficient JSON parsing using Moshi and Gson to convert between JSON data and Kotlin objects.

• Incorporated OAuth 2.0 for user authentication and authorization.

• Applied Android’s Keystore system for encrypting sensitive information, like user credentials and certificate data.

• Proficient in using Android Profiler for monitoring app performance, identifying and fixing memory leaks, and optimizing CPU and memory usage.

• Implementing caching strategies to reduce network calls and enhance the app's responsiveness.

• Very much proficient in use of JUnit and Espresso for unit and UI testing.

• Implemented (CI/CD) practices for regular, automated testing and deployment.

• Proficient use of Git for version control, facilitating team collaboration.

• Orchestrated the implementation of a halal certification authentication system, ensuring secure and reliable access for authenticated users, resulting in a 30% increase in user trust and a 20% decrease in unauthorized access instances.

• Boosted app performance by 40% through the implementation of lazy loading for components and utilization of memorization techniques, enhancing rendering efficiency and user experience.

• Engineered custom authentication logic employing JWT (JSON Web Tokens) to fortify user authentication and authorization, reducing unauthorized access attempts by 25%.

• Integrated deep linking and universal links, resulting in a 25% increase in user engagement by facilitating smoother navigation within the app.

FULL STACK DEVELOPER / Financial Industry Regulatory Authority (FINRA) - Rockville, MD 05/2022 - 07/2023

• Developed RESTful APIs and server-side logic using Spring Boot.

• Utilized AWS cloud services, including S3 for payload storage, and integrated AWS SDK to optimize cloud interactions.

• Implemented unit testing strategies to achieve 95% test coverage, tools like Mockito for dependency simulation.

• Worked on a responsive Angular-based frontend, employing microfrontend architecture for improved scalability and modular code structure.

• Used Angular testing frameworks, Jasmine and Karma, for thorough component and service-level testing.

• Utilized JUnit for backend testing, alongside Mockito for mocking Spring Boot API dependencies, ensuring high-quality API responses and reliability.

• Played a pivotal part in PI planning for new feature development and request management.

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• Designed and deployed a Sentry API for efficient error tracking and an OAuth service for secure API authentication, integrating these into a Jenkins-powered CI/CD pipeline for automated testing and deployment.

• Utilized JWT (JSON Web Tokens), resulting in a 30% increase in security measures for user authentication and authorization.

• Improved app performance by implementing lazy loading of components, resulting in a 25% reduction in initial load times, and utilizing memorization techniques, enhancing rendering efficiency by 20%.

• Employed AsyncStorage and SQLite for local storage, resulting in a 40% faster data retrieval process and providing seamless offline functionality for user preferences and app data. ANDROID DEVELOPER / Willis Towers Watson - Chicago, IL 02/2021 - 02/2022

• Spearheaded the development of an Android application for an IoT-based trouble ticketing management system in collaboration with cross-functional teams, achieving a 15% improvement in operational efficiency across Willis Towers Watson sites.

• Integrated the application with real-time IoT devices for data collection and automated ticket generation.

• Utilized AWS S3 for secure and scalable data storage.

• Designed the backend using Spring Boot for efficient data processing and workflow management.

• Developed an Android application in Kotlin, focusing on performance and user experience.

• Implemented Retrofit for effective network communication and API interactions.

• Led the development of the ticket status module, enhancing real-time tracking and updates.

• Used advanced Android development techniques, including LiveData, and Room.

• Utilized RESTful APIs for backend data retrieval, ensuring a 30% faster data transmission and seamless communication between the Android app and IoT infrastructure.

• Ensured data security by implementing encryption and authentication measures, resulting in a 40% reduction in potential security vulnerabilities and safeguarding sensitive information exchanged between the app and IoT sensors.

• Collaborated with UX/UI designers to create an intuitive interface, enhancing the user experience by 25% and improving the application's usability for streamlined hazard management. ANDROID DEVELOPER / WebsCare - Islamabad, Pakistan 07/2017 - 12/2019

• Implemented Android Data Binding, reducing boilerplate code by 40% and enhancing code readability by 30% through establishing a strong connection between UI components and data sources.

• Utilized Retrofit and OkHttp libraries to efficiently handle network requests, achieving a 20% increase in API response time and ensuring seamless communication with backend APIs by managing various HTTP methods and responses.

• Integrated Firebase Analytics and Crashlytics, resulting in a 25% decrease in app crash rates and providing valuable insights into user behavior, aiding in proactive issue identification and resolution. EDUCATION AND TRAINING

Masters Information Systems 03/2022

DePaul University - Chicago Illinois

Bachelors Computer Science 07/2018

COMSATS University Islamabad

CERTIFICATIONS

Android Developer Associate Issue Date: 07/2023

Google Certified Valid Till: 07/2025

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Foundations of Project Management Issue Date: 13/12/2023 Google Certified

RESEARCH PUBLICATIONS

1 – Article Title: Prediction of Blood Lactate Levels in Children after Cardiac Surgery using Machine Learning Algorithms.

Conference: IEEE 2023 Third International Conference on Artificial Intelligence and Smart Energy

(ICAIS)

Cited By: 14

2 – Article Title: The intelligent heart rate monitoring model for survivability prediction of cardiac arrest patients using deep cardiac learning model. Conference: 2023 Third International Conference on Smart Data Intelligence (ICSMDI – 2023) Cited By: 13

3- Article Title: Role of AI in Cardiovascular Health Care; a Brief Overview Vol. 2 No. 4 (2023): Journal of World Science

Cited By: 11

4- Article Title: Equity and Artificial Intelligence in Surgical Care: A Comprehensive Review of Current Challenges and Promising Solutions

Vol. 2 No. 2 (2023): BULLET: Jurnal Multidisiplin Ilmu Cited By: 14

5- Article Title: Evaluating the Potential of Artificial Intelligence in Orthopedic Surgery for Value- based Healthcare.

2023 - Vol 2 No. 1(2023) International Journal of Multidisciplinary Sciences and Arts Cited By: 11

6- AI'S Healing Touch: Examining Machine Learning's Transformative Effects On Healthcare Journal of World Science

Cited By: 4

7- Article Title: Revolutionizing Pharmaceutical Research: Harnessing Machine Learning for a Paradigm Shift in Drug Discovery

International Journal of Multidisciplinary Sciences and Arts Cited By: 4

8-Harnessing Predictive Power: Exploring the Crucial Role of Machine Learning in Early Disease Detection.

Journal of World Science

Cited By: 4

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