AboutMe

A story of growth and discovery

Sayidina Ahmadal Qososyi

Full-stack Web Developer atKawan Sehat Indonesia

Hello, you can call me Cozy. I'm a software engineer working within the React ecosystem. I care deeply about building software with intention, treating code as a craft, not just a tool. Through writing, I try to help others rebuild their understanding of fundamentals and see them through clearer mental models.

I was born in 2000 in East Lombok, Indonesia. I began learning programming in my second year of high school. At first, it was about HTML and CSS, learning how things are structured, how small details matter. That foundation slowly shaped how I think about building software: patiently, deliberately, and with respect for the process.

Writing became part of my learning practice. I use it to slow down, reflect, and refine my understanding. What started as personal notes eventually turned into articles shared here. If these writings help you think more clearly, or build with more care, then they've done their job.

I am also a full-stack engineer, here are my current favorite tech stack:

What I'm up to now

  • I'm a full-stack developer at Kawan Sehat Indonesia, working remotely from Lombok, Indonesia.
  • Right now, I'm building an extension called TraceShot—a tool that helps turn application flows into clear, readable documentation. At the moment, it supports apps built with React, Next.js, and React Native.
  • I also share my personal engineering notes on this blog. Feel free to explore them here.

Changelog from my journey

A quiet log of growth—where each step reflects learning, refinement, and intention.

Full-stack Developer

Kawan Sehat LogoPT Kawan Sehat Indonesia - Jakarta · Remote

Web Developer

LKP ITEC - Mataram, West Nusa Tenggara · Remote
  • Developed the Instalasi Farmasi project with Vue JS and Express JS, managing 17,149 medications and 50,873 medical devices while implementing periodic synchronization with the Satu Sehat system to ensure accurate and up-to-date data.
  • Maintained the Billing Monitoring system using Alpine JS and Express JS, optimizing billing workflows and managing an average of 428 invoices daily
  • Designed and developed a scalable room booking application using Next JS, aiming to streamline reservation management with features like real-time availability and user-friendly scheduling.
e-rentada
instalasi farmasi
billing monitor

Machine Learning Engineer

Squadrones AI - Mataram, West Nusa Tenggara · Hybrid

    Software Engineer

    Sonicboom Solutions - Kuala Lumpur, Malaysia · Remote

    I work as a software engginer intern focused on building web applications using the ASP.NET Framework, below is what I've done:

    • Develop real-time chat web applications using SignalR on ASP.NET Framework
    • Build symmetric and asymmetric encrypted web applications using multiple algorithms (DES, 3DES, Hash and Salt, MD5)

    Front-end Web Developer

    Yada Ekidanta - Bandung, West Java, Indonesia · Remote

    working as a frontend web developer, here's what I've done:

    • Designed and implemented responsive desktop and mobile views for the Bajaga e-commerce platform using Laravel and Vue JS, ensuring an optimal user experience across devices.
    • Contributed to the development of the Team Sync project, a team management and project collaboration SaaS application, by creating interactive and responsive UI components using Next JS to enhance user experience and streamline workflows.
    • Developed an Android application for blood sugar monitoring, utilizing Java for the front-end and Laravel for the back-end to ensure seamless functionality and user interaction.