Trading Tools
DCA & Risk Calculator
Calculators that help traders size positions and plan entries without spreadsheets.
Next.js 15TypeScriptTailwindi18n
trading-tools.sindev.my.idAvailable for freelance projects
I build digital products that work — for your business.
Singgih Budi Purnadi · Frontend & Mobile Developer based in Jakarta.
5+
Years Experience
20+
Projects Delivered
3
Industry Domains
01 — About
About Singgih Budi Purnadi — Frontend & Mobile Developer Jakarta
I don't just build investment apps — I use them daily. 5+ years developing financial and infrastructure applications while managing real portfolios in stocks, crypto, and futures.
When existing tools didn't meet my needs, I built my own. Currently Frontend & Mobile Developer at Bursa Investasi Digital, designing interfaces for retail traders — while trading myself.
Experience
Bursa Investasi DigitalFrontend & Mobile Developer
Aug 2024 — PresentTraders FamilyFrontend Developer
Aug 2024 — May 2025Jasa MargaFrontend Developer
Aug 2023 — Jul 2024Litedex DigitalFrontend Developer
Jul 2021 — Jul 202302 — What I Do
Services built around your problem, not my stack.
Web Application
Dashboards, admin panels, and custom web apps that hold up under real use.
Next.jsReactTypeScript
Mobile App
Cross-platform mobile development — one codebase, native feel on both stores.
FlutterReact Native
Frontend Development
Landing pages, company profiles, and pixel-faithful UI implementation.
Next.jsTailwind CSS
Consultation
Tech-stack advice, code review, and PM support for teams finding their footing.
ArchitectureCode ReviewPM Support
03 — My Process
Four steps. No surprises.
STEP 01
Discovery
Understand your goals, users, and requirements before a line of code.
STEP 02
Design
Wireframes and a UI proposal you can react to early and cheaply.
STEP 03
Build
Development with regular updates — you always know where things stand.
STEP 04
Launch
Deploy, test, and a clean handover so the product is truly yours.
04 — Selected Work
Things I've shipped.
Real products with real users — across trading, infrastructure, and commerce.
Portfolio Tracker
Asset Management
Track holdings across stocks, crypto, and futures in one consolidated view.
Next.js 15TypeScriptPostgreSQLDrizzle ORM
demo-portfolio-tracker.sindev.my.idInventory for UMKM
Stokin.online Internal / NDA
Inventory for UMKM
A lightweight inventory system for small businesses — real product, real users.
Next.jsTypeScriptFull Stack
SFCE Dashboard
Data Dashboard
Charts and metrics surfaced clearly for fast, confident decisions.
Next.jsTypeScriptChart.js
sfce-dashboard.vercel.app
JIMMS · Jasa Marga Internal / NDA
Toll Maintenance GIS
A GIS-based system for tracking and scheduling toll-road maintenance on the map.
Next.jsLeafletGIS
Litedex Protocol Internal / NDA
DEX Platform
A decentralized exchange with staking and farming, built on Web3 rails.
React.jsWeb3Smart Contract
05 — By The Numbers
20+
Projects Delivered
5+
Years Experience
3
Industry Domains
Client testimonials coming soon — currently collecting them post-launch.
06 — FAQ
Good questions, answered.
07 — Let's Talk
Have a project in mind?
Let's talk.
Tell me what you're building. I'll tell you honestly how I can help — and how long it'll take.