Hi, my name is Kirellos

Skills

• Core Java: Java SE 7/8/11/17, Multithreading, Collections, Streams, Lambda
• Frameworks: Spring Boot, Spring Cloud, Spring Security, Hibernate, JPA, Camunda
• Microservices: REST APIs, Event-Driven Architecture, RabbitMQ
• Cloud & DevOps: Oracle Cloud, Azure, Docker, Jenkins, CI/CD
• Databases: MySQL, Oracle DB, MongoDB
• Frontend: Angular, Flutter
• Testing: JUnit, Mockito
• Tools: Git, Maven, Gradle, SonarQube, Jira
• Deep Learning: TensorFlow and Keras

Experience

Senior Java Developer

Smart Cube, Dubai | Jun 2019 – Present

• Engineered a complete payment gateway (AjmanPay) microservice application using Spring Boot and Hibernate.
• Reduced payment processing latency by 30% through optimized queries and asynchronous processing.
• Integrated 7+ payment methods (ApplePay, E-Wallet, Direct Debit, Credit/Debit Card, POS, M-POS).
• Developed an AI module with TensorFlow & Keras, improving form completion rates by 40%.
• Built workflow engine with Camunda for Sharjah Health Authority.
• Implemented PCI DSS security compliance measures.
• Streamlined Reserva Flutter Application to improve client booking experience.

Senior Java Developer

AOT, Cairo | Jan 2018 – May 2019

• Developed microservices-based project management tool using Spring Boot.
• Improved performance by 30% via Java code optimization.
• Applied Agile practices, achieving 20% faster delivery and 40% fewer defects.

Java Developer

Ejada, Cairo | May 2015 – Dec 2017

• Built money remittance web application with Spring + JSF, integrated with middleware services.
• Released Riyadh Capital full stack app with AngularJS (Mutual Fund module).
• Revamped Ecorp project for Riyad Bank using Spring MVC.
• Increased scalability to support 50% more concurrent users.

Java Developer

Sphere Consulting, Cairo | Sep 2014 – Apr 2015

• Developed mobile expense management app using Titanium Appcelerator.
• Delivered workflows via ADF Mobile + REST services.
• Improved quality by reducing software defects by 30% using Agile practices.

Education

Bachelor of Science, Computer Science | 2010

Certifications

• Oracle Cloud Infrastructure 2023 Certified DevOps Professional
• Oracle Cloud Infrastructure 2023 Certified Foundations Associate
• Oracle Certified Professional, Java SE 7 Programmer (2014)
• Oracle