Yahya Wijaya.
Dedicated to clean, maintainable code — crafted with patience and precision. Building enterprise systems that endure.
Systems Architect & Problem Solver
Backend developer who ships things that stay up — from a logging library published on Maven Central to production notification services running for millions of Telkomsel subscribers.
Currently a Java Developer at PT XLSMART Telecom Sejahtera Tbk (via IDstar), building backend microservices, RESTful APIs, and event-driven integrations with Solace PubSub+. Previously a Junior Consultant at PT PHINCON, working alongside Telkomsel, BNI, and BCA.
Where most of the work happens — REST APIs, Spring Security, the bulk of client delivery.
Reached for when a service needs to be small, fast, and boring in the good way.
Learned on the job maintaining BusinessWorks flows and EMS queues for banking clients.
Comfortable enough to read a slow query plan and know where to look first.
A personal open-source Java library published to Maven Central. Provides a standardised, reusable logging utility for Spring Boot applications.
View on Maven Central →A community-based odour reporting mobile application. Users can pin, rate, and browse smell reports on an interactive map.
smellradar.yahyawijaya.com →Development of API services to support business operations and Notification Systems. Designed and enhanced backend services for seamless, uninterrupted operation.
Upgraded TIBCO products to the latest versions. Created documentation for TIBCO Enterprise Administrator and guided the installation process.
Developed a bespoke enterprise application for BNI's Procurement division. Built REST APIs and database views using Oracle.
Handled incidents and developed cases for TIBCO BusinessWorks 5. Created documentation and log rotation procedures for archival purposes.
- Developed and maintained backend microservices using Java and Spring Boot to support enterprise-scale telecom systems.
- Integrated and optimised RESTful APIs to enable seamless communication between internal and external platforms.
- Worked with Solace PubSub+ for event-driven messaging across distributed services.
- Contributed to a cloud migration initiative, moving microservices from AWS to Tencent Cloud with minimal downtime.
- Designed, developed, and maintained high-performance backend services for enterprise-scale clients.
- Architected and optimised secure REST APIs for seamless data exchange.
Implemented enterprise-grade integration flows using TIBCO BusinessWorks and EMS.
Assisted in developing internal web applications using PHP and Zend Framework.
Get in Touch
Open to new projects, freelance work, or just a chat about backend engineering.