Available for work

Full-Stack Engineer

I'm Dian Handiyansah, a Full-Stack Engineer with 5+ years of experience building scalable web and mobile applications with React, Angular, TypeScript, and Node.js. I create reusable UI architectures and ship complete features—from drag-and-drop report tools to AI applications powered by LLMs and RAG.

Currently learning C/C++ and exploring game-engine architecture, low-level programming, and performance-oriented systems.

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Dian Handiyansah

Experience

Full Stack Developer

PT Komuri Indonesia (GeekGarden) — Assigned to AIDO

Dec 2025 — Sep 2026

Sleman, Yogyakarta

  • Fixed a shipping-cost vulnerability by moving price validation to the backend, preventing client-side manipulation.
  • Developed a multi-drop delivery feature that enabled multiple orders to be grouped and assigned to a single driver.
  • Maintained and monitored integrations with third-party delivery providers, covering shipping quotations, order creation, driver assignment, shipment tracking, webhook processing, and delivery status synchronization.
  • Integrated healthcare systems with BPJS and SATUSEHAT APIs, including patient visits, referrals, medical procedures, allergies, and clinical data synchronization.
  • Implemented request signing, data mapping, validation, error handling, and logging for external healthcare API integrations.
  • Revamped key user flows using a new design system and developed internal tools to support operational teams.

Frontend Developer

PT. Riam Anugerah Semesta

Jul 2023 — Nov 2025

South Jakarta, Jakarta

  • Developed maintainable, performant Angular and React applications with TypeScript.
  • Built reusable UI components and a drag-and-drop report designer for dynamic report creation.
  • Implemented end-to-end testing and CI/CD pipelines to improve reliability and deployment.

Full Stack Developer

PT. Karsa Omni Teknologi Adicipta

Jan 2020 — Jun 2023

South Jakarta, Jakarta

  • Built web and mobile applications using React, TypeScript, and React Native.
  • Delivered a white-label e-commerce platform for faster client onboarding and customization.
  • Integrated real-time consultation chat with Sendbird to improve user engagement.

Full Stack Developer

Freelance

Jan 2022 — Present

Remote

  • Built an AI-powered medical anamnesis system using LLMs and ElevenLabs voice.
  • Implemented Celery background processing for responsive APIs and concurrent workloads.
  • Developed a LlamaIndex RAG pipeline for more accurate, document-grounded AI responses.

Skills

Languages

  • JavaScript
  • TypeScript
  • Python
  • Java
  • PHP

Frontend

  • React.js
  • Angular
  • Tailwind CSS

Backend

  • Node.js
  • NestJS
  • Flask
  • Laravel

Mobile & Data

  • React Native
  • Flutter
  • MySQL
  • PostgreSQL

Core: API & system design · performance optimization · cross-team collaboration

Education

Dumbways.id

Fullstack Developer Bootcamp

Oct 2019 — Nov 2019 · South Tangerang

Vocational High School

Electrical Engineering

Jul 2016 — Jun 2019 · Cianjur