Sleman, Yogyakarta, Indonesia
Available for freelance projectsNicholas Dwinata
Software Engineer · Web3, Android & Full-Stack Developer. Informatics student at Universitas Kristen Duta Wacana, building across Web3, native Android, and full-stack web.
Services
What I can build for you
I take on freelance projects for businesses in Indonesia and abroad — from a first landing page to custom systems that run your daily operations.
Landing Page & Company Profile Website
A fast, modern website that makes your business look professional and easy to contact.
What you get
- Responsive design (mobile-first)
- SEO & social-media preview setup
- WhatsApp contact integration
- Deployment + custom domain
Timeline: 1–2 weeks
Business Web App — POS, Inventory & Invoicing
Custom systems that replace spreadsheets: point-of-sale, stock management, and invoicing.
What you get
- Custom dashboard & reports
- Stock / SKU management
- Receipt & thermal-printer support
- Staff accounts & roles
Timeline: 3–6 weeks
Delivered: System POS · Colombo Electronic — Stock Keeping Engine
Android App Development
Native Android apps with notifications, offline support, and on-device ML when you need it.
What you get
- Kotlin + Jetpack Compose
- Reminders & notifications
- On-device ML (TensorFlow Lite)
- Play-ready build
Timeline: 4–8 weeks
Delivered: MedTime — Panti Wredha Mulya · AppTunaWicara
Web3 / dApp Development
Smart contracts and dApp frontends — from hackathon-winning prototypes to production.
What you get
- Solidity smart contracts (Foundry)
- Wallet integration (wagmi/viem)
- EVM chains: Mantle, Arbitrum, Monad
- Token-gated & payment flows (x402)
Timeline: Scoped per project
Delivered: OwnaFarm · Legatum · Golda Finance
No public price list — every project is scoped individually, and a quote is free.
Systems I built run in production every day: a POS for one of Yogyakarta's busiest retail outlets, and a stock & invoicing engine for Colombo Electronic.
About
Informatics student at Duta Wacana Christian University (UKDW) with a track record of shipping high-impact products across Web3, native Android, full-stack web, and Go backend services deployed with Docker. Award-winning hackathon builder (1st Place Mantle Hackathon, APAC Arbitrum Finalist, Monad Blitz Jogja 4th Place) and recipient of national PKM grant funding. Also an experienced community leader who has coordinated large-scale international and regional tech conferences.
Achievements
Awards & grants
1st Place, Mantle Global Hackathon 2025 (GameFi & SocialFi Track)
OwnaFarm
Frontend Web3 Developer. OwnaFarm turns real agricultural invoices into seeds you can plant, water, and harvest — real yield backed by real-world assets on Mantle. Built a dual-interface frontend (farmer & investor portals) wired to smart contracts.
www.ownafarm.xyzFinalist, APAC Arbitrum Hackathon
Legatum
Web3 Full-Stack Developer. Architected and deployed smart contracts on Arbitrum for automated, trustless digital-asset distribution, plus a fully functional dApp UI.
legatum-nicdwn.vercel.app4th Place, Monad Blitz Jogja
Golda Finance
Team project on Monad Mainnet: an anti-inflation savings app that auto-routes USDC into yield-generating vaults (gold/BTC) via LiFi swaps, with a Gemini AI advisor and x402 micropayments.
golda-finance-monad.vercel.appNational Grant Recipient, PKM-PM (Kemdikbudristek)
MedTime — Panti Wredha Mulya
Project Leader. Secured competitive national research-grant funding and led end-to-end development of MedTime, an automatic medication-reminder Android app for Yayasan Wredha Mulya Yogyakarta.
Selected work
Projects
1 / 9
Colombo Electronic — Stock Keeping Engine
LiveInventory & invoicing dashboard for an electronics retailer
Next.js · TypeScript · Tailwind CSS · Firebase
Visit live site ↗
OwnaFarm
Live1st Place, Mantle Global Hackathon 2025 — GameFi meets real-world assets
Next.js · Solidity · wagmi/viem · Mantle Network
Visit live site ↗
Legatum
LiveFinalist, APAC Arbitrum Hackathon — trustless asset distribution
Next.js · Solidity · Arbitrum
Visit live site ↗
Golda Finance
Live4th Place, Monad Blitz Jogja — anti-inflation savings on Monad
Next.js · Solidity · Foundry · Privy +3
Visit live site ↗
InitiaAgent
LiveINITIATE Season 1 Hackathon (Initia × DoraHacks) — non-custodial AI trading agent marketplace
Next.js · Solidity · Foundry · Express.js +3
Visit live site ↗
Beyond code
Leadership & community
Alongside engineering, I've led student organizations and helped run large-scale tech conferences — from campus-wide student bodies to an international speech-technology conference and a Google developer community event.
Leader — BPM FTI (Student Representative Body, Faculty of Information Technology)
Oversee all divisions, chair cross-org meetings (HMTI, HMSI, BEM FTI), and channel student aspirations to faculty leadership.
Leader — HMTI (Informatics Student Association)
Managed all divisions, improved organizational efficiency, and supported university/faculty-run activities.
Vice Head — Google DevFest Yogyakarta
Co-led the coordination team for a large-scale developer conference — logistics, volunteer workflows, venue management, and on-site incident handling.
Team UKDW Coordinator — O-COCOSDA 2025 (International Conference of Oriental COCOSDA)
Coordinated cross-division communication for a 3-day international conference on speech technology and AI hosted at UKDW.
Contact
Open to internships, freelance work, and hackathon teams.
Based in Sleman, Yogyakarta, Indonesia. The fastest way to reach me is WhatsApp.