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An automated WhatsApp channel delivering daily AI news and updates — content sourced, summarized, and published end-to-end with Hermes and WAHA.
Software engineer & AI engineer, building products that ship.
I'm Steven Siahaan — a Jakarta-based engineer with a decade of experience shipping Flutter, Android, and iOS products. Today I split my time between mobile, AI engineering, and product work for teams that want to ship the right thing well.
Stack
Flutter Dart Kotlin Swift Firebase Python LLM Apps BLoC
01 · About
A short introduction.
I build mobile software that people use at work, every day. Point-of-sale terminals across hundreds of franchises. School platforms used by students, parents, and teachers. HRIS apps that quietly handle attendance and leave for thousands of employees.
The throughline of ten years has been the same: shipping cross-platform products that don't break — and lately, doing it alongside AI tooling that makes teams faster.
I'm currently an AI Engineer & Senior Software Engineer at PT. Berlian Sistem Informasi, where I deliver AI-driven solutions for the Mitsubishi Group — including a ChatGPT-class conversational platform and computer-vision mobile apps.
02 · Selected work
Products I've helped ship.
02
An online psychology assessment platform for intelligence, personality, and mental-health tests — from the Intelligence Structure Test to depression, anxiety, and stress screening — guided by professional psychologists.
03
Internal generative AI platform for Mitsubishi Group: conversational chat, RAG-powered regulation search, image generation, automated meeting minutes, and document translation.
07
Andal Linkage →
Mobile HRIS for location-based attendance, leave, permits and medical claims.
08
Baboo →
A creative platform for reading, writing, and selling original stories & comics.
03 · Capabilities
What I can help with.
a.
Flutter, end-to-end
Greenfield architecture (BLoC, Riverpod), hardware integrations — Bluetooth printers, customer displays, cash drawers — and production retail deployments.
b.
Native Android & iOS
Kotlin and Swift when the platform demands it — payment integrations, MVP/MVVM refactors, offline-first patterns.
c.
AI engineering
Conversational platforms in the spirit of ChatGPT, retrieval over private corpora, MOM automation, and multilingual document translation.
d.
Product management
Scoping, roadmapping, and standing between engineers and stakeholders so the right thing ships — not just the loudest one.
e.
Rapid prototyping
Fast, opinionated PoCs that prove the idea before the budget. R&D-grade software the team can demo on Monday.
f.
Cross-platform delivery
Single codebases across Android, iOS, and Windows — for franchise networks where downtime is measured in revenue lost.
04 · Experience
Where I've worked.
AI Engineer & Senior Software Engineer
PT. Berlian Sistem Informasi
Delivered AI-driven solutions for the Mitsubishi Group — a ChatGPT-class conversational platform with MOM automation, company-specific knowledge delivery, and multilingual translation. Built a CV mobile app that detects bird-droppings on vehicles for paint-damage prevention. Shipped multiple R&D PoCs.
Flutter Developer
Runchise
Built a cross-platform Point-of-Sale app for Android, iOS, and Windows — used by hundreds of franchises. Integrated Bluetooth printers, iMin customer displays, and cash drawers. Delivered the Runchise Back-Office app to support operations.
Mobile Developer
Telkomsel · Skul.id
Owned features for Attendance, Permits, Ebook, Scheduling, and Score across three roles — Student, Parent, and Teacher. BLoC architecture on Flutter, Firebase for the moving parts.
Mobile Developer
PT. Andal Software Sejahtera
Refactored the entire HRIS app onto clean architectural patterns while preserving legacy code paths. Built Andal Connect from scratch in Flutter for cross-platform delivery.
Android Developer
PT. Baboo Teknologi Indonesia
Built an Android app for generating and reading user-written stories, with Midtrans payments integrated for the marketplace. MVP architecture, Firebase backend.
Android Developer
Kargo.co.id
Designed and delivered a Tracking Management System for logistics operators, plus a customer-facing companion app for booking deliveries.
05 · CV
Grab the CV.
A current copy of my CV — ten years of mobile, AI, and product work distilled into two pages. Hosted on Google Drive; click to open or download.
Download CV →