Full-StackEngineer
Hey! I'm Zulfikar Ulya Zen — people call me Zen. A full-stack developer based in Bantul, Yogyakarta, Indonesia, focused on building modern, scalable web experiences.
From idea to launch. Clean, scalable digital products built to move fast, stay simple, and perform in real-world use.
Services
- 01
Frontend Development
- UI Development
- Responsive Layouts
- Web Performance
Pixel-accurate, accessible interfaces built with React, Next.js, and modern CSS. Fast by default, responsive across every screen.
- 02
Backend Development
- API Design
- Databases
- Authentication
Reliable server-side systems with Node.js, NestJS, and Laravel. Clean APIs, sane data models, and secure foundations.
- 03
Full-Stack Applications
- End-to-End Build
- CMS
- Realtime Data
Complete products from database to deployment — content-managed sites, dashboards, and realtime monitoring platforms.
- 04
Product Consulting
- Technical Direction
- Web Strategy
- Code Review
Pragmatic guidance on architecture, stack choices, and delivery — helping teams ship faster with fewer regrets.
- 05
AI & LLM Engineering
- LLM Integration
- AI Coding Agents
- Local LLM Setup
- Agent Harnesses
Bringing AI into real workflows — integrating LLM-powered features, running AI coding agents (Claude Code, Codex, OpenCode), and building agent harnesses on fully local model setups, including Hermes-based agents.
Selected Work
Experience
- 01
10/2024 — Present
Current
Collaborating across multiple teams to develop and enhance web applications — implementing responsive, accessible UI from UI/UX designs and integrating backend APIs for seamless data flow.
- Setup Dashboard for Privy's clients
- Privy's Core Service
- Load testing & optimization of services
- 02
12/2022 — 10/2024
Joined multiple teams to develop various web applications — implementing designs given by UI/UX designers and integrating APIs from backend engineers.
- Landing Page Privy.ID
- Monitoring Dashboard for Privy's clients
- Setup Dashboard for Privy's clients
- Liveness Detection Web App
- Dynamic Form
- Profile Configuration
- 03
03/2024 — 12/2024
Teaching a fullstack web development bootcamp class, guiding students from fundamentals through production-ready projects.
- Fullstack Web Development class — Vue 3 and Laravel
- 04
06/2022 — 12/2024
Fullstack Engineer
Widya Robotics- Vue.js 3
- Bootstrap CSS
- Nest.js
- PostgreSQL
Developed various complete web applications from the front-end side to the back-end side.
- Fullstack Gas Detector
- Backend MyNitro
- 05
10/2021 — 05/2022
Front-End Engineer
Widya Robotics- Nuxt.js 2
- Electron.js
- Vuetify
- Vue.js 2
Joined several teams to develop various web applications — implementing designs given by UI/UX designers and integrating APIs from backend engineers.
- UAV LiDAR 3D Processor
- Smartwarehouse App
- 06
01/2020 — Current
Current
Freelance Web Developer
Self-EmployedDelivering web applications based on client needs — from marketing landing pages to full-stack platforms and CMS-driven sites.