VOL. VI · No. 44

THE BONSKY TIMES

Muhammad Ilham Rafiannandha

The Quiet Half Of The Internet

Billing engines, double-entry ledgers, and the routers that decide whether you buffer tonight.

MUHAMMAD ILHAM RAFIANNANDHASENIOR FULL STACK ENGINEER · JAKARTA

27 MODULES · 8 DATABASES · ONE DEPLOYABLE WORKS ON MY MACHINE KNOWN BUGS: NaN — see Corrections, p.1 PLUS: A CAT NAMED CIMOL 15 SITES LIVE
Rp 0 OPEN THE PAPER
VOL. VI · No. 44 JAKARTA FREE · ALWAYS WAS
JAKARTA EDITION

THE BONSKY TIMES

All the code that's fit to ship

PROFILE · PAGE ONE

The Man Who Puts Money In Integers

Six years building systems where being wrong is expensive.

BY THE DESK OF ILHAM RAFIANNANDHA

Muhammad Ilham Rafiannandha
THE SUBJECT, photographed mid-gesture.

Muhammad Ilham Rafiannandha — known to everyone who has ever worked with him as Bonsky — builds the unglamorous half of the internet.

It is not work that photographs well.

He is, at time of printing, Senior Full Stack Engineer at an Indonesian fibre ISP.

His degree is in English Literature.

SECTION ACONTENTS2

Fifteen things that are running right now, and the pages they are on.

  1. SECTIONS
  2. 1Who He Is
  3. 3The Arsenal
  4. 4War Stories
  5. 6Shipped & Live
  6. 7Chronology
  7. 8Write To Us
  8. No navigation bar. This is a newspaper.
SBLNET — the subscriber platform, live

THE LEAD4

Twenty-Seven Modules, Eight Databases, One Deployable

An ISP's entire subscriber lifecycle.

TOURISM5

Built For A Queue, Not For A Demo

TRAVEL5

Logistics, Wearing A Religious Hat

ALSO INSIDE

OPERATIONS4

The Booth Freezes At Midnight

EDUCATION & LABOUR5

Teaching Japanese, Then Finding The Job

GOVERNMENT5

A Portal With No Plugins To Audit
SECTION BTECHNOLOGY3

What he reaches for, arranged by the part of the stack that is currently on fire.

BACKEND

Java 17+ · Spring Boot · Spring Modulith · Spring Security · Laravel · NestJS · Node.js · Go / Fiber · PHP

FRONTEND

Next.js · React · Vue 3 + Pinia · TypeScript · JavaScript · Tailwind · SvelteKit

MOBILE

React Native · Flutter · Dart · Kotlin Multiplatform · Android

DATA

PostgreSQL · MySQL · Redis · TimescaleDB · Firebase · Multi-datasource ACID

INFRA

Docker · Jenkins · Nginx · GitHub Actions · Git · Grafana · Linux / VPS

NETWORK

MikroTik RouterOS · FreeRADIUS / AAA · PPPoE · RADIUS Accounting · CoA Disconnect · OLT & NOC

PAYMENTS

Duitku · BRI Fixed VA · Midtrans · QRIS · Double-Entry GL · Reconciliation

SYSTEMS

C++ · Rust · Python · WebSocket · Express

SECTION CWAR STORIES4

Most of this work lives in private client repositories.

LEAD FEATURE

Twenty-Seven Modules, Eight Databases, One Deployable

An ISP's entire subscriber lifecycle.

—

A modular monolith on Spring Modulith.

Read the full case study PT Surya Bestari Lestari · SBLNET · sblnet.id

“Floats and money are a horror film.”

OPERATIONS

The Booth Freezes At Midnight

Itoya Self Photo Studio.

—

Customers book a booth online.

Itoya · itoya.my.id

FINANCE

Proving Every Rupiah Moved

One job, and this is it.

Two-stage reconciliation.

PT Cashlez Worldwide Indonesia

HUMAN RESOURCES

So People Stop Clocking In For Each Other

CoffeeLabs.

—

Attendance with GPS geofencing.

PT Cyber Lab Indonesia · HRIS · back office

EDUCATION & LABOUR

Teaching Japanese, Then Finding The Job

ArkaLearn and Spectro.

—

A two-sided marketplace.

PT Arka Spektrum Solutindo · arkalearn.com

TOURISM

Built For A Queue, Not For A Demo

Taman Safari Bogor.

—

QR and barcode scanning.

GlobalTix Teknologi Indonesia · domestic.tamansafaribogor.com

GOVERNMENT

A Portal With No Plugins To Audit

DPUPR Musi Banyuasin.

—

The easy version is a theme.

INFRALOK · dpupr.mubakab.go.id

TRAVEL

Logistics, Wearing A Religious Hat

Elteyba Tours and SmartHajj.

—

Passports, visas, seat quotas.

Elteyba · elteybatours.com

SECTION DSHIPPED & LIVE6

Every address below was checked before this edition went to press.

SBL NETFiber ISP — subscriber platform, billing, provisioningsblnet.id BIG PROPERTYApartment and room booking platformbigproperty.online WHITE BOXDaily and transit apartment rentalpropertywhitebox.com ITOYASelf-photo studio booking + remote managementitoya.my.id DPUPR MUBAGovernment agency portal on a custom CMSdpupr.mubakab.go.id COFFEELABSCompany sitecoffeelabs.co.id COFFEELABS HRISAttendance, GPS geofence, face recognitionapp.coffeelabs.co.id COFFEELABS ADMINBack office consoleadmin.coffeelabs.co.id ELTEYBA TOURSUmrah & Hajj agency platformelteybatours.com ELTEYBA GOJamaah portalelteybago TAMAN SAFARIDomestic ticketing + back officedomestic.tamansafaribogor.com ARKALEARNJapanese-language EdTech feeding a job portalarkalearn.com GUDANG DUSB2B custom packaging cataloguegudangdusbandung.com TAIBA COCOCHATrilingual site (EN/ID/AR) + sales CRMtaibacoco.co.id AEROCAMDrone training centre — the 2021 build was hisaerocam.co.id HASANAIN CENTERCompany profile + registration systeminstagram

CLASSIFIED

WANTED

Someone brave enough to tell me a refactor is too large.

FOR SALE

One Windows virtual machine, unopened.

LOST

Four hours. Last seen near a rounding error.

SECTION ECHRONOLOGY7

Eleven employers and clients, in reverse order, as is traditional.

  1. DEC 2025 — PRESENTSenior Full Stack EngineerPT Surya Bestari Lestari · SBLNET
  2. MAR 2025 — DEC 2025Full Stack DeveloperPT Cashlez Worldwide Indonesia
  3. JUN 2023 — FEB 2025Full Stack Developer · Team LeadPT Cyber Lab Indonesia · CoffeeLabs
  4. JUL 2024 — AUG 2024Full Stack DeveloperProSpark Pte Ltd · Singapore
  5. NOV 2023 — JAN 2024Full Stack DeveloperTaman Safari Indonesia · Bogor
  6. SEP 2023 — DEC 2023Full Stack DeveloperPT Arka Spektrum Solutindo
  7. JUN 2023 — AUG 2023Mobile DeveloperNghbr INC · New York City
  8. NOV 2022 — MAY 2023Full Stack EngineerRemedi Indonesia
  9. APR 2021 — NOV 2022Full Stack DeveloperPT Elteyba Medina Fauzana
  10. FEB 2020 — APR 2021Full Stack Web DeveloperPT Taiba Cococha Indonesia
  11. MAR 2017 — SEP 2017Full Stack Web Developer · InternshipTVRI

ON THE RECORD

2022 · Speaker — HMIK Talk, Pertamina University

2022 · Main speaker — Permikomnas Jakarta

Two universities handed him a microphone in 2022.

EDUCATION

Universitas Darma Persada, Jakarta

Bachelor of English Literature — GPA 3.60 / 4.00 · 2018–2023

Not a computer science degree.

ADVERTISEMENT

THE CV, IN PDF

Everything in this edition, compressed into the one format recruiters keep asking for.

Download the CV
SECTION FWRITE TO US8

A system that has to balance to the cent, stay up at 3am, or ship to both stores.

Electronic maililhamrafi44@gmail.com Professional networkin/ilhamrafi44 Source, such as it is public@ilhamrafi44
Desk locationJakarta, Indonesia · UTC+7