Gunawan Santoso
Software Engineer in Jakarta, Indonesia
Digital products shaped by clean design and solid engineering — leveraging AI to move faster and build smarter.
Portfolio
A solo-run mobile studio.
39+ apps on iOS and Android — designed, coded, and shipped solo. Alongside years of engineering at Shopee, Gojek, and beyond.
Projects
Selected work
A collection of apps I've shipped solo to the App Store and Google Play, alongside web platforms built for real businesses.
Daily Diary: Journal & Memories
Journal for writing, memories, photos & mood — Year in Pixels, On This Day, streaks. 100% offline.
DayStack: Daily Planner & Todo
All-in-one productivity with todo list, Pomodoro timer, and timebox planner.
Money Manager: Expense Tracker
Intuitive finance tracking for better spending decisions.
Fasting Track: Fasting Timer
Intermittent fasting timer & tracker with 17+ plans, schedules, and stats.
Kraepelin Test
Enhance focus and mental agility with Kraepelin testing.
Breathe: Calm & Relax
Find calm through guided breathing and mindfulness exercises.
BrainIQ — IQ Test & Training
Test your IQ, train your brain & track your score across 7 cognitive categories.
Crossword Master: Word Puzzle
Daily crossword challenges with 4 difficulty levels, hints, themes & stats.
2048 Merge — Number Puzzle
Classic 2048 with multiple modes, daily challenges, 8 themes & smooth animations.
Luna: Period & Cycle Tracker
Understand your cycle through four seasons with daily logging and insights.
Time Track: Activity Timer
Simple stopwatch timer with labels, insights, and activity heatmap.
Chinese Calendar: Auspicious
Discover the richness of traditional Chinese calendar systems.
Micro Habit
Build lasting habits through small, consistent daily actions.
QR Scanner: Barcode Reader
Effortlessly scan and process QR codes and barcodes instantly.
Screen Time: App Usage Track
Monitor screen time, set goals, and build healthier digital habits.
Walletly: Money Manager
Track transactions, manage budgets, and monitor multiple wallets in one simple app.
Shopping List: Grocery Planner
Offline grocery lists, pantry tracker, budget — no account, no cloud.
Moneto: Money Manager & Budget
Private, on-device money manager with budgets, goals, debt, assets & net worth.
BMI Health: Body Weight Log
Calculate BMI, log weight & track wellness with 16 health calculators — private & offline.
LightKit — Flashlight & Tools
Bright LED flashlight with compass, magnifier, SOS beacon, level, and ruler.
Spinly — Spin Wheel Decision
Random spinner wheel, dice, coin, team maker & more decision tools for groups.
Countdown — Days Until Event
Beautiful countdown timers for birthdays, trips, holidays & every moment that matters.
Color Blind Test — Vision Exam
Ishihara, Snellen, contrast & astigmatism — the complete offline eye test in 2 minutes.
Meal Planner & Recipes: Larder
Weekly meal planner with 300+ recipes, auto grocery lists & hands-free cooking mode — offline.
File Manager & Cleaner: Tidy
Honest file cleaner with duplicate finder, storage analyzer, recycle bin & full file manager.
Memory Test & Brain Training
10 scientific memory tests — digit span, Corsi block, N-back, Simon & more.
Book Tracker & Reading List: Read
Track books, time sessions, save quotes — Year-in-Books grid, calendar & 15 achievements.
Water Reminder: Drink Tracker
One-tap water tracking with smart reminders, 7 drink types & animated water vessel.
Speed Test: Internet & WiFi
Test internet speed against Cloudflare's 300+ servers — 15 seconds, 30-day history.
Flashcards & Study: CardFlip
Spaced repetition flashcards with 4 study modes, streaks & achievements — fully offline.
Unit Converter & Calculator
Fast offline unit converter — 20 categories, 100+ units including BMI and cooking sizes.
Guitar Tuner & Metronome: Tunify
Chromatic tuner with one-cent accuracy + tap-tempo metronome, 30+ tunings.
Invoice Maker & Receipt: PDF
Create invoices, estimates & receipts in 2 minutes — 10 templates, 30+ currencies, offline.
Weather & Forecast: Breeze
Beautiful weather with animated illustrations, hourly forecast & 10+ home widgets.
Personality Test: MBTI TypeMe
MBTI, Big Five, Enneagram & Love Language tests in one beautiful offline app.
Love Calculator: Compatibility
Test love compatibility 6 ways — name, zodiac, birthday, fingerprint, photo & quiz.
PDF Reader & Tools: PDFKit
Read, edit, merge, compress, sign & convert PDFs — 100% on-device, no uploads.
TapTally
Tap, tally, track — multi-counter with goals, history & volume buttons.
Reaction Time Test & Brain: Reflex
8 scientific reaction tests — simple, choice, go/no-go, audio, memory & more.
Megcheese (PT. Megmilk Snow Brand Indonesia)
Corporate landing page with voucher redemption campaign and budget management portal.
Arahin (PT. Navi Arah Vanadium)
Import-export platform with 600+ SSG pages, SEO optimization, and content management.
Yours (Professional Permanent Makeup Studio)
Permanent makeup studio website with service portfolio and academy training programs.
GoFrost (Cooling Solutions Provider)
Industrial cooling solutions website with service portfolio and integrated contact system.
Willylesmana.com (Professional Photography)
Photography portfolio with custom CMS for content and order management.
Career
Experience
Recognition
Awards
Most Evolving
2024S-Quantum Engine
Value Star Award
2023Shopee Indonesia
2nd Place, Hackathon
2017Bina Nusantara Computer Club
Finalist, Hackathon
2016FIT Competition UKSW
2nd Place, Web Design
2015SMAK 5 Penabur
1st Place, Web Programming
2014SMAK 7 Penabur