A deep dive into the technologies and frameworks I use to build robust, scalable, and high-performance enterprise applications. My focus is on the Java ecosystem and the SAP Commerce (Hybris) platform.
The foundation of my engineering expertise, focusing on robust, object-oriented systems and high-throughput backend services.
More than 8 years of hands-on experience building mission-critical backend systems in Java 8 through Java 21+. Proficient in modern features such as Virtual Threads (Project Loom), Streams API, and modular architecture. Led the development of enterprise-scale platforms serving high-traffic e-commerce websites including motorkux.id, auto2000.co.id, and seva.id. Focused on writing clean, maintainable code following SOLID principles and design patterns.
Lead LevelExtensive use of the Spring ecosystem for both microservices and monolithic enterprise architectures. Deep understanding of Spring Security, Spring Data (JPA/Hibernate), and Dependency Injection for scalable application design. Currently leading the migration of SAP Commerce platforms into Spring Boot–based microservices, designing service boundaries, RBAC models, and reusable platform capabilities.
AdvancedSpecialized expertise in the SAP Customer Experience (CX) suite and large-scale commerce platform implementation.
Deep expertise in SAP Commerce Cloud architecture, including core platform customization, data modeling, OCC API development, Backoffice extensions, and CMS management. Led multiple enterprise implementations and platform upgrades (versions 6.6 through 2205) for Astra Group digital properties. Experienced with promotion engine customization, CMS lazy loading strategies, and full-page caching architecture using EHCache.
Lead LevelHands-on experience with SAP Customer Data Platform for unified customer profiling, segmentation, and identity resolution. Familiar with SAP Engagement Cloud (formerly SAP Emarsys) for omnichannel marketing automation, campaign orchestration, and personalized customer engagement across multiple business domains.
IntermediateDeveloping familiarity with ABAP development for core business logic extensions within the SAP S/4HANA ecosystem. Currently supporting SAP S/4HANA integration initiatives and expanding ERP integration expertise to bridge commerce and back-office operations.
BeginnerDesigning distributed systems that are scalable, resilient, and deeply integrated within enterprise landscapes.
Specializing in complex enterprise system integrations using RESTful APIs and SOAP web services. Designed and implemented integrations between SAP Commerce and third-party services, including payment gateways (credit card, virtual account), shipping providers, and parent company platforms. Focus on data integrity, secure communication, retry mechanisms, and reliable message exchange.
AdvancedFocus on architectural scalability and performance engineering for high-traffic platforms. Designed full-page caching architecture reducing page load from ~2s to sub-second. Implemented CMS lazy loading and image resizer proxy reducing payload size up to 80%. Achieved 3× traffic spike resilience using Redis, EHCache, and CDN strategies.
AdvancedImplementing event-driven architectures for real-time data synchronization between distributed enterprise systems. Experienced in designing producers, consumers, topic partitioning, and message schema management for high availability and guaranteed delivery.
IntermediateExperienced with Azure Function Apps for implementing serverless logic to augment core enterprise platform capabilities. Set up CI/CD pipelines using Azure DevOps and Jenkins to automate build, test, and deployment processes across multiple environments.
IntermediateDesigned a dynamic rules engine (Rules-as-a-Service) using Drools, enabling client-defined conditions and actions without code deployment. Built a reusable rules platform that decouples business logic from application services, including a payload validator on the fly. Delivered as a core platform capability for the SAP Commerce modernization initiative.
Intermediate