I'm obsessed with learning and experimentation — exploring backend systems, SAP, cloud, and modern web stacks to craft reliable, future-proof experiences.
End-to-end solutions: from ABAP and backend development to UI/UX and deployment.
Designing and enhancing Z-programs, BAPIs/FMs, OData services, and troubleshooting issues in SAP ECC.
Robust REST API development with layered architecture, Redis caching, CI/CD automation, and secure payment gateway integration (Xendit).
Building responsive and efficient Android apps with Kotlin and modern architecture patterns, focusing on performance and UI/UX best practices.
Efficient SQL-based data processing for reports, analytics, and operational insights.
Multi-environment builds, monitoring, and secure release pipelines.
Booking synchronization, webhooks, HMAC authentication, and digital signature implementation.
A snapshot of my journey from early internships to current roles in SAP, backend, and mobile development.
Developed an Android application with biometric authentication, and implemented notification features integrated with the cloud computing team's API.
Developed APIs for mobile front-end needs, created UI/UX designs for new app flows, implemented an overlay-based notification system, and contributed to a Flutter/Dart mobile application project.
Building and maintaining Vue.js–Node.js applications integrated with SAP OData services. Developing SAPUI5 apps with real-time backend communication, creating custom ABAP programs and User Exits, managing SAP Transport Requests, optimizing multi-environment Docker setups, and implementing Xendit payment workflows.
Selected work across SAP, backend services.
As one of two developers, I led the backend and SAP ECC integration (OData, enhancements, table design) for an end-to-end padel booking system with Node.js APIs, Xendit, and AYO Indonesia API. Go-live: 1 Jan 2025.
Developed as part of a 2-developer team, I led the backend and SAP ECC integration for the GRO operational workflow-covering real-time check-in, equipment handling, racket status tracking, customer validation, and SAP-integrated transaction processing. All GRO bookings are fully synchronized and integrated with AYO Indonesia’s platform. Go-live: 1 Jan 2025.
A business simulation dashboard that visualizes key operational data across multiple departments—Procurement, Production, Sales, Human Capital, and Warehouse. Includes charts, metrics, and real-time indicators to help users monitor costs, capacity, employee performance, and material movements in a single unified view.
Android app with biometric login and cloud API integration for managing tickets and notifications.
Mobile system that can interrupt any active application when a disaster occurs, automatically closing other apps and displaying real-time BMKG hazard alerts to ensure immediate user awareness.
Android-based boarding house rental marketplace research app featuring MVVM architecture, dependency injection (Koin), offline-first data persistence (Room), real-time availability updates (Firebase), and location-based recommendation modeling.
A collection of the tools, technologies, and platforms I use to build modern, scalable solutions.
For business inquiries, collaborations, or project discussions — feel free to reach out.
or email me directly at alexkristianmalau@gmail.com