Ahmad Yardimli

Java (Backend, Android) and JS (React)

Backend Developer – Java, Spring Boot, AWS, Docker, MySQL
Backend developer specializing in creating robust, scalable, and secure applications using Java and Spring Boot. I have designed and implemented RESTful APIs, ensuring seamless communication between the client and server through a clean, layered architecture. My expertise covers the full spectrum of backend development, from data modeling with MySQL and JPA/Hibernate to advanced error handling and transaction management.

Key Backend Skills and Achievements:

• RESTful API Development: Built and maintained modular endpoints using Spring Boot, incorporating controllers, services, repositories, and DTO mappers to ensure clean separation of concerns and maintainability.
• Microservices Architecture: Designed and implemented distributed systems using microservices principles with Spring Boot, enabling modular, scalable, and resilient applications through independent, containerized services deployed on AWS EC2.
• Security Implementation: Integrated JWT-based authentication and password encryption to secure endpoints, safeguard user data, and manage access rights efficiently.
• Database Management: Designed and optimized data persistence with MySQL and JPA/Hibernate, ensuring efficient data handling and integrity through robust entity-to-DTO mapping.
• Containerization & Deployment: Utilized Docker for containerizing applications and deployed them on AWS EC2 instances, enabling scalable and resilient cloud solutions.
• Robust Error Handling & Validation: Developed comprehensive exception handling (custom exceptions for resource not found, validation, and conflict scenarios) and implemented data validation techniques to enhance application reliability.

Android Developer – Native Java, REST API Integration, UI/UX, State Management

I develop robust, scalable, and efficient mobile applications using native Java. I design and implement intuitive interfaces and ensure seamless integration with backend services throughout the Android development lifecycle.

Key Android Skills and Achievements:

• RESTful API Integration: Developed applications that reliably communicate with backend systems using asynchronous HTTP calls, ensuring dynamic data exchange and real‑time updates.
• User Interface & State Management: Created responsive and intuitive user interfaces with effective state management, resulting in a smooth and engaging user experience.
• Clean Architecture & Maintainability: Employed modular design principles to build scalable applications with a clear separation of concerns, making maintenance and feature enhancements straightforward.
• Robust Error Handling & Performance Optimization: Implemented comprehensive error handling and performance tuning strategies to ensure stability and fast responsiveness across diverse devices.
• Secure Data Handling: Integrated secure authentication and data persistence mechanisms to protect user information and deliver reliable mobile solutions.

Front-End Developer – ReactJS, JavaScript, HTML, CSS

I build responsive and interactive web applications using ReactJS. I work closely with designers and stakeholders to create visually appealing, user‑friendly websites that deliver an engaging user experience.

Key Front-End Skills and Achievements:

• Component-Based Architecture: Developed modular, reusable components to streamline development and maintenance.
• State & Data Management: Ensured dynamic, smooth interactions through effective state management.
• Responsive Design: Crafted layouts that adapt seamlessly to various devices.
• Performance Optimization: Implemented best practices to maximize rendering efficiency and user engagement.

Project Fulfilled:

SiWord (Game)

• Built the front-end of "SiWord" using React all by myself, making it look great and ensuring an enjoyable user experience for this fun word game that tests vocabulary and problem-solving skills.
• Developed Android and iOS applications separately using Android Studio and Xcode, applying WebView to enhance the user experience and functionality.

Access SiWord on: http://www.siword.com

App Store link: https://apps.apple.com/us/app/siword/id6444662158

Google Play link:

https://play.google.com/store/apps/details?id=com.siword.android

Project Ongoing:

Full-Stack Application for "Zeka Tehsil Merkezi" Education Center, Gabala, Azerbaijan

I am building a comprehensive full‑stack solution that integrates a robust backend with a responsive Android frontend.

Backend Contributions:

• Developed secure and scalable RESTful APIs using Java and Spring Boot with MySQL for data persistence.
• Integrated JWT‑based authentication, advanced error handling, and input validation.
• Containerized applications using Docker and deployed services on AWS EC2.
• Utilized GitLab for efficient version control and collaborative development.
  

Android Frontend Contributions:

• Engineered a native Android application in Java that communicates seamlessly with backend services via RESTful APIs.
• Implemented efficient state management and comprehensive error handling for a smooth, responsive user experience.
• Employed GitLab for effective version control during development and collaboration.
  

This integrated approach leverages my full‑stack expertise to deliver a secure, scalable, and maintainable solution tailored for the education center.

References

• Samir Gahramanov
  Former Software Engineer at Allelica Inc.
  Contact: +994 50 628 17 58 | samirgahraman@gmail.com
  Collaborated closely on various projects, contributing to enhanced functionality and overall performance.
• Rustam Atakishiyev
  CTO at DillBill
  Contact: +994 77 313 57 76 | rustam.atakisiev@gmail.com
  Worked together on key projects where my contributions significantly improved system performance and functionality.

Projects Contributed To:

• www.tibbia.org
• www.experiencesrome.com
• www.jsrome.com