M. Alfa Ridzi, S.Mat

• Tax Analytics Dashboard: Developed robust Java (Play Framework) backend services and PHP Laravel/JavaScript frontend for PAD revenue visualization, integrating multiple complex local government tax APIs. Engineered backend-to-frontend data flow for critical reporting.
• Retribution Management Platform: Designed and built a waste truck tracking system with real-time GPS integration. Implemented complex retribution calculation logic. Showcased experience with location-based data and tracking logic.
• Document Generation System: Developed PDF export modules and integrated with legacy printing systems, demonstrating adaptability to existing infrastructure.
• IPO Corporate Website: Built a high-performance, responsive site using React/Next.js/Tailwind CSS, including investor relations and financial data visualization components.
• CI/CD Automation: Developed custom **Python scripts** to automate the build and deployment process for both backend (Java) and frontend (Laravel) applications, significantly streamlining the release pipeline and improving deployment reliability.

Sales Tracking (Field Management System)

• Engineered and built a robust **Android mobile application** used by 450+ field agents.
• Implemented real-time **geolocation tracking** (achieving 10m accuracy) and designed a resilient **offline-first architecture** using Room DB to handle challenging network conditions, syncing 10k+ daily transactions reliably.
• Integrated document capture with ML-based form recognition and implemented **input validation algorithms**, significantly reducing data entry errors by 72\%.
• Focused on **application performance, memory management, and data synchronization** for a smooth user experience.
• Collaborated closely with product and QA teams throughout the development lifecycle.
• Technologies: **Java/Kotlin (Android)**, Room DB, Geolocation API, **RESTful API Integration**.

Knowledge Management System (KMS)

• Engineered an enterprise knowledge base serving 1,200+ daily users with 98.7\% uptime, demonstrating ability to build large-scale, reliable systems.
• Developed neural search functionality and optimized MySQL indexing, reducing knowledge retrieval time by 65\%.
• Designed admin dashboard with granular permissions (RBAC), emphasizing security and access control design.
• Technologies: PHP, MySQL, Performance Optimization.

Learning Management System

• Led end-to-end development of a Laravel-based platform serving 5,000+ users, demonstrating project ownership and delivery.
• Implemented secure JWT authentication and SCORM-compliant course delivery.
• Developed automated grading system reducing manual evaluation time by 40\%.
• Technologies: PHP Laravel, JWT, MySQL.

Recruitment Platform

• Architected a PHP-native application processing 1,200+ monthly applications, showcasing system design.
• Designed candidate matching algorithm and integrated AI-powered resume parsing (Python NLTK), highlighting algorithm and AI integration skills.
• Technologies: PHP, Python (NLTK), MySQL.

Social Media Analytics

• Built a real-time sentiment analysis engine processing 50k+ posts/day, showcasing high-throughput data processing.
• Implemented Python-based NLP pipeline and created dashboards visualizing brand health metrics.
• Technologies: PHP, Python (NLP), Real-time processing.

Call Center Wallboard

• Developed a real-time monitoring system for 200+ agents.
• Reduced data latency using WebSockets, demonstrating expertise in real-time data streaming and performance optimization.
• Technologies: PHP, JavaScript, WebSockets, Twilio API.

• Successfully launched an educational **Android application** from scratch, scaling to 500+ active users and managing a team of 20+ tutors.
• Defined the application's **architecture** and technology stack (**Kotlin, Java, Firebase**), focusing on scalability and maintainability.
• Oversaw the development process, including **code reviews** and technical guidance for developers, ensuring adherence to coding standards and best practices.
• Implemented a complex math equation solver using Math.js within the application.
• Managed **app deployment** to Google Play Store and monitored performance post-launch.
• Featured on Google Play Store's "New Educational Apps" section (Dec 2021).
• Technologies: **Kotlin, Java (Android Development)**, Node.js, **Firebase (Backend, Authentication, Database)**, Math.js, **Google Play Store Deployment**.

• Developed a critical triage tool (mention if mobile/web) adopted by 50+ physicians across 15 hospitals, demonstrating ability to build high-impact applications rapidly under pressure.
• Implemented a WHO-recommended scoring algorithm with 95\% clinical accuracy, highlighting strong analytical and algorithm implementation skills.
• Designed the system with **security and data compliance** in mind (using HIPAA-compliant Firebase).
• Featured in Indonesian Medical Association newsletter (May 2020).
• Technologies: Java, Firebase (HIPAA-compliant, Database), Algorithm Implementation.

• Developed a complex STEM-focused editor as an independent initiative, gaining 5,000+ global users (65\% international), demonstrating ability to conceive, build, and deploy a sophisticated application end-to-end.
• Implemented LaTeX-to-SVG conversion for accurate equation rendering and integrated collaborative editing functionality using Operational Transformation via WebSockets, showcasing expertise in real-time systems and complex algorithms.
• Technologies: Java, JavaScript, WebSocket, Complex Algorithms, Independent Project Management.

• Initiated development of a food delivery and taxibike application.
• Implemented core functionalities using Kotlin.
• Currently on hold, demonstrating early-stage project experience in the logistics domain.
• Technologies: Kotlin.