Full stack web developer with about 10 years of experience building web apps, forms, and APIs with HTML, CSS, JavaScript, PHP, and Laravel.
Catur Septian
@caturseptian · Jakarta, ID
Core toolkit
@caturseptian · Jakarta, Indonesia
I'm a full stack web developer from Jakarta and have been building web apps since 2016. Most of my work is in HTML, CSS/Sass, and JavaScript on the front end and PHP, Laravel, and MySQL or SQL Server on the back end.
Right now I work on a reporting system for a government agency. I took it over from a previous vendor, with quite a few bugs and outdated libraries, and with my team I've been fixing it and moving business logic out of the database into Laravel code. Before that I worked at a startup in Yogyakarta, building online shops and a school marketplace with Xendit and Midtrans payments, and later managed the IT team there.
I use AI tools while coding, but I check and test the code myself before it goes live. I also try to be careful with personal data, for example by encrypting ID numbers. Lately I've been learning more about data engineering and AI: Python ETL, report automation, and small LLM apps.
Marketplace connecting households, waste collectors, and recyclers, with buy/sell flows, inspection and price adjustment, moderated chat, email verification, and KYC. Checkout via Xendit (virtual account, e-wallet, QRIS, card) or manual transfer with proof upload.
PDF tools that run in the browser: merge, split, rotate, reorder, watermark, page numbers, and e-signature. Processing runs in Web Workers, files are not uploaded to a server, and there is no tracking.
Open-source Laravel package on Packagist with official Indonesian region codes (Kepmendagri 2025: 38 provinces to 83,762 villages), plus optional postal codes, coordinates, boundaries, and islands. An interactive installer generates only the tables you pick, and an eject mode copies everything into the app so production has no dependency.
Open-source Go module on pkg.go.dev with the same Kepmendagri 2025 region data (38 provinces to 83,762 villages) embedded in the binary, plus postal codes, coordinates, islands, and code-change history. The core package uses only the standard library; sqlload installs the data into PostgreSQL, MySQL/MariaDB, or SQLite and verifies it.
Open-source Laravel package on Packagist for Eloquent slugs with Indonesian-aware rules (Kab. → kabupaten; drops PT, Tbk, and (Persero)). One codebase supports Laravel 6–13 and PHP 7.2–8.5, tested by a 16-job CI matrix. An eject command lets apps drop the dependency.
Open-source Laravel package on Packagist that shows which Pennant feature-flag variant wins: it tracks impressions and conversions per variant and reports conversion rate, lift, and statistical significance on a dashboard. Hits are written after the response is sent, with lean daily counters.
Free, read-only static JSON API of Indonesian regions with hierarchy, coordinates, boundaries, and postal data — no server, served straight from a CDN, with validation scripts and tests.
Indonesian-language customer-service chatbot that answers from a knowledge base using retrieval-augmented generation, with streamed answers and friendly error handling.
Self-hosted CLI that runs YAML scenarios in a real browser for UAT and functional tests: login with TOTP MFA, role/IDOR permission checks, passive security scans, and evidence capture, with HTML and JUnit reports for CI.
Local web app that extracts operational events from site CCTV footage. Every field carries a confidence score and evidence frame; no facial recognition, with documented data-protection (UU PDP) compliance.
Generates hundreds of personalized letters (.docx/.pdf) from a single Excel recap by filling an untouched Word template, with a web upload page, CLI, and pytest test suite.
Self-hosted finance app with a true double-entry ledger enforced in the database, multi-organization roles, audit log, EN/ID language toggle, and document import with OCR and rollback.
Cross-platform agent that watches CPU, memory, and disk on production servers and sends Telegram or SMTP email alerts with cooldown and anti-spam logic. Single static binary with CI releases.
Web-based flood simulation workbench for 1D/2D hydrodynamic modeling with GIS input, scenarios, a job queue, and GeoJSON/PDF result exports.
Two-factor authentication for Laravel 12 built from scratch with no external packages — a clean reference for secure login flows.
IT services company · assigned to a government energy regulator, Jakarta
Government energy regulator, Jakarta
Tech startup, Yogyakarta
Tech startup, Yogyakarta
Self-employed
STMIK Amikom Yogyakarta
Courses:
STMIK Amikom Yogyakarta
HTML Essentials
Cisco Networking Academy / Credly
Nov 28, 2025
Web Development Fundamentals
IBM SkillsBuild / Credly
Dec 2, 2025
Generative AI for Project Managers (3 badges)
Project Management Institute / Credly
Jun – Sep 2026
Membangun Sistem Machine Learning (MLOps)
Dicoding Indonesia
2026
LLM Guide for Developers: Basics to Practical Apps
Hacktiv8 / Udemy
May 11, 2026
Advanced Golang
Hacktiv8 / Udemy
Jun 7, 2026
Docker Essentials: A Developer Introduction
IBM / Credly
Nov 27, 2025
Getting Started with OpenTofu (LFEL1009)
The Linux Foundation / Credly
Nov 30, 2025
MongoDB Schema Design Patterns
MongoDB / Credly
Apr 18, 2026
Architecting on AWS – Associate (training)
Amazon Web Services
Jan 2024
Database Fundamentals (MTA)
Microsoft
Jun 30, 2016
Plus 8 completed Dicoding courses (machine learning, deep learning, data processing, Gen AI on Azure) and more on Credly and Dicoding.
Open to full-time remote web developer roles. I can adjust my hours to overlap with US or European time zones.
Like my open-source projects? You can support them here: