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.
- Engineered and maintained mission-critical backend services in Golang and Java for uninterrupted BAU operations.
- Improved throughput and reduced latency through service enhancements in a high-traffic production environment.
- Monitored and resolved real-time issues within the NOIS framework to keep 24/7 service availability.
Upgraded TIBCO products to the latest versions. Created documentation for TIBCO Enterprise Administrator and guided the installation process.
- Created documentation to upgrade TIBCO Enterprise Administrator to the latest version.
- Guided the installation of TIBCO products, ensuring a successful upgrade for BPS.
Developed a bespoke enterprise application for BNI's Procurement division. Built REST APIs and database views using Oracle.
- Built REST APIs using TypeScript and database views using Oracle for BNI's Procurement division.
- Supported API integration work with the front-end team.
Handled incidents and developed cases for TIBCO BusinessWorks 5. Created documentation and log rotation procedures for archival purposes.
- Documented and reproduced issues raised by Smartfren in TIBCO BusinessWorks 5.
- Built shell scripts and log rotation processes for log archiving, and traced issues to root cause.
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.
- Managed and configured API Gateway to handle routing, authentication, and traffic management across microservices.
- 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.
- Monitored service performance and logs using Splunk, collaborating with cross-functional teams through code reviews and technical discussions.
Designed, developed, and maintained high-performance backend services for enterprise-scale clients.
- Architected and optimised secure REST APIs for seamless data exchange.
- Refined backend logic and database queries to improve application response times.
- Collaborated within cross-functional teams across all stages of the SDLC.
- Helped translate business requirements into technical specifications aligned with client objectives.
Implemented enterprise-grade integration flows using TIBCO BusinessWorks and EMS.
- Built and documented REST APIs using Spring Boot and Spring Rest Docs.
- Applied core security protocols and web services using Spring Security.
- Assisted with system administration tasks in TIBCO Administrator for deployment and monitoring.
Assisted in developing internal web applications using PHP and Zend Framework.
- Analysed and designed database schemas for new application features.
- Implemented version control best practices (Git) across the development team.
- Integrated third-party services and authentication systems to strengthen application security.
Get in Touch
Open to new projects, freelance work, or just a chat about backend engineering.