AJF

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AJF

About
Projects
Services
Expertise
Blog
Contact
man wearing Henley top portrait

Full Stack Developer: Shipping Reliable Web Platforms & REST APIs.

Combining React frontend architecture with secure REST API backend systems. I engineer data-driven web platforms and manage containerized DevOps (Docker/Nginx) for zero-friction user experiences.

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Experience

My experience is defined by shipping reliable React/TypeScript frontends, bulletproof API validations, and containerized DevOps pipelines that eliminate environment drift and operational bottlenecks. ​

PT.Shield On Service Tbk - WEB DEVELOPER

June 2024 - September 2025

I owned the end-to-end delivery and stability of enterprise web platforms (React/TypeScript, PHP, Node.js). My work ranged from architecting a vehicle booking system adopted by 14 branches, to maintaining and scaling legacy applications with new features like SSO integration and UI/UX overhauls. I partnered directly with the Marketing team to engineer SEO pages driven by robust REST APIs. To ensure predictable operations, I locked down the deployment lifecycle using Docker.

PT.SOS - WEB DEVELOPER

June 2024 - September 2025

I owned the end-to-end delivery and stability of enterprise web platforms (React/TypeScript, PHP, Node.js). My work ranged from architecting a vehicle booking system adopted by 14 branches, to maintaining and scaling legacy applications with new features like SSO integration and UI/UX overhauls. I partnered directly with the Marketing team to engineer SEO pages driven by robust REST APIs. To ensure predictable operations, I locked down the deployment lifecycle using Docker.

Freelance - Android Developer

January 2024 - July 2024

Technical improvement of an existing Flutter application, overhauling its UI/UX implementation to deliver a more fluid and reliable user experience. I stabilized the client–server architecture by refactoring REST API integrations with robust error handling.

Freelance - Android Developer

January 2024 - July 2024

Technical improvement of an existing Flutter application, overhauling its UI/UX implementation to deliver a more fluid and reliable user experience. I stabilized the client–server architecture by refactoring REST API integrations with robust error handling.

Teknohorizon - Full Stack Developer

March 2023 - May 2024

I shipped production web applications with React + TypeScript, building reusable components and consistent UI patterns that kept internal/product workflows fast to evolve. On the backend, I delivered Python REST APIs with strong validation and predictable contracts to support both web and mobile clients without brittle integrations. I also contributed Android features in Kotlin + Jetpack Compose.

Teknohorizon - Full Stack Developer

March 2023 - May 2024

I shipped production web applications with React + TypeScript, building reusable components and consistent UI patterns that kept internal/product workflows fast to evolve. On the backend, I delivered Python REST APIs with strong validation and predictable contracts to support both web and mobile clients without brittle integrations. I also contributed Android features in Kotlin + Jetpack Compose.

Frontend Developer & UI/UX Designer

January 2018 - November 2022

I managed the end-to-end lifecycle of multiple frontend applications and small mobile games—handling everything from UI/UX design and clear visual hierarchy to stable REST API integrations for analytics, ads, and authentication. I focused heavily on building reliable client-side data flows and consistent release workflows (testing, versioning, store submissions) to ensure smooth user experiences. By continuously iterating on usability and retention based on direct user feedback, one of my self-published projects scaled to reach over Rp 100M in peak monthly revenue through optimized ads and IAP.

Frontend Developer & UI/UX Designer

January 2018 - November 2022

I managed the end-to-end lifecycle of multiple frontend applications and small mobile games—handling everything from UI/UX design and clear visual hierarchy to stable REST API integrations for analytics, ads, and authentication. I focused heavily on building reliable client-side data flows and consistent release workflows (testing, versioning, store submissions) to ensure smooth user experiences. By continuously iterating on usability and retention based on direct user feedback, one of my self-published projects scaled to reach over Rp 100M in peak monthly revenue through optimized ads and IAP.

PT. PLN Pekanbaru - IT Support

May 2017 - July 2017

Provided troubleshooting for hardware/software and basic network connectivity issues and assisted with workstation setup

PT. PLN Pekanbaru - IT Support

May 2017 - July 2017

Provided troubleshooting for hardware/software and basic network connectivity issues and assisted with workstation setup

Engineering Foundation & Expertise

I don’t claim to know every language. I focus on a specific stack to build predictable frontends, resilient REST APIs, and stable deployments that actually survive in production.

Frontend Architecture

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Backend & REST APIs

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DevOps & Deployment

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Mobile & Product Lifecycle

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