Success Otto

• APEX Integration with Inetco MW for payout.

I designed and built an integration to handle large volumes of transactions to APEX, which is Geidea's new payout and settlement system. I used a microservice and event-driven architecture, applying design patterns like the outbox pattern to ensure that all transactions are properly accounted for.

Technologies Used.

Java 17, Spring Boot, Spring MVC, JPA, MongoDB, Spring Reactive programming (WebFlux), JUnit Testing, Docker, Kubernetes, Redis Stream, Redis Cache.

• BNPL (Buy now, pay later)

Designed and built a middleware system that efficiently handles, processes, and federates transactions to various payment platforms, including Visa Installment, Tabby, and Tamara. Leveraging the SAGA pattern for distributed transactions, I ensured robust orchestration and fault tolerance across multiple services. Additionally, I implemented the OUTBOX pattern to maintain data consistency and reliability throughout the transaction lifecycle. This comprehensive approach significantly enhanced the system's ability to manage complex transaction workflows and ensured seamless integration with external payment providers.

Technologies Used.

Java 8, Spring Boot, Spring MVC, JPA, PostgreSQL, JavaScript, Bootstrap 4, React js, and Redux, Spring Web Services (REST), Mockito Testing, HTML5, CSS3, TCP/IP, JSON. Docker, Kubernetes, Kafka.

• E-receipt.

Geidea e-receipt is made up of a POS app, which sends transaction data to a server that processes it. I designed a system to make it scale using the CQRS pattern and the OUTBOX pattern to mitigate the loss of events.

Technologies Used.

Java 8, Spring Boot, Spring MVC, JPA, PostgreSQL, JavaScript, Bootstrap 4, React js, and Redux, Spring Web Services (REST), Mockito Testing, HTML5, CSS3, TCP/IP, JSON. Docker, Kubernetes, Redis stream.

• GSDK

Geidea settlement system gets transaction data, does settlement and reconciliation against bank statement, and does payout to merchants. Designed a system that scales using event-driven architecture with hexagonal and domain-driven design.

Technologies Used.

Java 8, Spring Boot, Spring MVC, JPA, MongoDB, Mockito Testing, JSON. Docker, Kubernetes, Kafka.

• • NGenius Online
• NGenius is a payment gateway used to accept payment from Visa, MasterCard, and also alternative payment methods (APM).
• Technologies Used.
• Java 8, Spring Boot 2, Spring MVC, Hibernate 4, MongoDB, JavaScript, Bootstrap 4, React js, and Redux, Spring Web services (REST), Mockito Testing, HTML5, CSS3, XML, JSON. Docker, Kubernetes, Kafka, RabbitMQ, and Microsoft Azure.
• • Digital Onboarding
• I was part of the team that built a self-service system, so merchants will be onboarded early and see the progress of the onboarding stages.
• Technologies Used.
• Java 8, Spring Boot 2, Spring MVC, Hibernate 4, MongoDB, Bootstrap 4, React js, and Redux, Spring Web Services (REST), JUnit Testing, HTML5, CSS3, JSON. Docker, Kubernetes, RabbitMQ, and Microsoft Azure.
• Developed scalable and maintainable code, ensuring long-term stability of the software.

• • Permit
• Permit is a web-based solution developed from scratch, which mainly focuses on end-user customer experience. The project was developed for integration into the Dubai World system. Permits' goal is to make import and export of goods and services easy and friendly. It was developed using the latest technologies available in the market.
• • Technologies Used
• Java 8, Spring Boot 2, Spring MVC, Hibernate 4, MySQL DB, JSP, jQuery, Ajax, JavaScript, Bootstrap 4, Angular 6, Spring Web Services (REST), Mockito Testing, HTML5, CSS3, XML, JSON.

• Druveen is a web-based school management product that delivers an end-to-end solution to both teachers and parents, providing the full spectrum of functionality and giving greater visibility at a more detailed level for records or information concerning any student move. Interfaces with other systems, provides ease of data exchange with existing system. This product involves modules like smart card attendance, Inventory Management System, Finance management, Staff assignment, Admission, event management, privileges and role management, library management, homework, and curriculum management.
• Key responsibilities.
• Designing, development, and support of Java-based web applications in the airline domain.
• Involved in full Project Lifecycle – Requirement analysis, Estimation, Development, and Bug Fixing.
• Design and develop internal and external web-based applications using a development framework.
• Functional and appealing web and mobile-based applications based on usability.
• Write functional requirement documents and specifications.
• Develop and customize the software according to client requirements.
• Design and build new database structures, and develop MySQL database environment.
• Developing and implementing solutions based on user requests using J2EE technologies, including Spring MVC, JSPs, and Hibernate.
• Managing, coordinating, and deploying fortnightly code releases using Tomcat server.
• Mentoring support for junior members in the team.
• Project
• • Druveen
• Druveen is a web-based school management solution developed from scratch, which mainly focuses on end-user customer experience. The project was developed for various school and college clients. It was developed using the latest technologies available in the market.
• • Technologies Used
• Java 8, Spring Boot 1.5x, Spring MVC, Hibernate 4, MySQL DB, JSP, jQuery, Ajax, JavaScript, Bootstrap 4, Angular 4, Spring Web Services (REST), Mockito Testing, HTML5, CSS3, XML, JSON.
• • Tomcat Server
• • Qleaner
• Qleaner is a mobile-based laundry solution developed from scratch, which mainly focuses on the end-user customer experience. The project was developed for various laundries to use for their customers to connect and place orders with ease. It was developed using the latest technologies available in the market. Available on the App Store and Play Store.
• • Technologies Used
• ES6, React Native, Firebase Database, Redux Framework, and JavaScript.
• • Servers
• Skysilk and Revive Server.

• An aide to automate admission, academics, and administration of educational institutions.
• An Institution Management System, specially designed to automate the manual educational processes.
• It offers actionable insights to all stakeholders across student performance, staff management, leave management, and fee management for informed decision-making and proper functioning of the institution.