Jerome Hainaut

Independent developer. I design, build and ship mobile and web products end to end, mostly on Solana: investing, trading and fitness. Oplop is the name I publish my apps under.

Products I built

Moonstone

Invest in US stocks, ETFs, gold and treasuries from your own Solana wallet in a few taps, with an assistant that explains what moves them. Android app for the Solana Seeker, plus a web app.

• Kotlin
• Jetpack Compose
• TypeScript API
• Postgres
• Solana

Website Privacy policy Terms of use

FitForge

A fitness coach that brings your activity, sleep and meals into one picture: AI meal logging from a photo, Health Connect and Apple Health sync, and an AI coach to talk it through.

• Flutter
• TypeScript
• Vercel
• AI
• Solana payments

Website Privacy policy Support

DegenEZDiscontinued

A trading terminal for Solana perpetuals with AI trading agents: you set an agent's rules, it posted signals on the chart, and you could track every bot's performance and chat with it about its decisions. Backed by a multi-bot backtesting engine.

• Next.js
• TypeScript
• Python
• Backtesting
• Solana

Website

BullFlipDiscontinued

An on-chain coin-flip game on Solana: players flipped against a shared house pot, with provably fair randomness and payouts settled by the program itself.

• Rust
• Anchor
• Switchboard
• Solana

Website

Also worked on

Step Finance

The portfolio dashboard for Solana: track every token, DeFi position and NFT across wallets. Front-end work on the Step web dashboard.

• Next.js
• TypeScript
• Turborepo
• shadcn/ui

Website