Software Engineer at Sinovasi Idea Karya

Contributed to the architectural design of an online ticketing system by producing system flow diagrams, designing database structures, and supporting technical planning decisions. Participated in technology evaluation and prototype testing with stakeholders, assessing trade-offs across backend stacks (Node.js, PHP), databases (MySQL, MongoDB, RethinkDB), and caching solutions (Redis). Proposed scaling approaches and performance strategies to support thousands of users and peak holiday traffic conditions. Optimized system performance through query tuning and caching implementation, reducing overload risk under high-traffic scenarios. Supported a primarily monolithic architecture with selective semi-microservice services deployed on a single-server infrastructure.

Software Engineer at Multi Karya Solusi

Designed offline-capable ticketing web application for ships operating in remote environments, ensuring continuous operation under limited connectivity. Implemented synchronization mechanisms between local and central servers to maintain data consistency across unreliable networks. Enhanced and extended an existing database schema, improving system structure and supporting new operational requirements. Built backend APIs using PHP (Laravel) and integrated frontend components with React.js to support maintenance scheduling, repair tracking, and cost monitoring modules. Developed analytical reporting features and optimized database queries for spare-parts usage and maintenance cost tracking. Maintained production systems by troubleshooting issues, fixing bugs, and ensuring application stability.

Software Engineer at Epsilon Prisma Sinergi

Optimized GIS-based mobile and web applications for offline operation in low-connectivity environments by implementing local storage with a local server setup and API-based synchronization to the central server. Developed a web questionnaire platform supporting large-scale census collection (~1,000 respondents with multi-record datasets) using schema-based validation to ensure data consistency and integrity. Built a role-based submission and review system for foreign academic certification equivalency with structured multi-stage approval workflows for public and internal users.