Flint

What it is

flint.mn is a dating and social platform run by Chelguun Solutions LLC. Instead of endless random swiping, it reads profile details, interests and conversation signals and shows why a match may be worth starting. The web app is live and the React Native app is coming soon to the App Store and Google Play. I was the lead engineer, on both the backend and the front end.

How it is built

• Monorepo. A Turborepo monorepo shared by the web app, the mobile app and the API.
• Web. React with TanStack Start.
• Mobile. React Native with Expo.
• Backend. NestJS with GraphQL, MongoDB and Redis.

What the app does

• Swipe. One profile at a time: photos, basics such as gender, location (which can be hidden), body type and what kind of relationship they want, answers to profile prompts, a voice answer and a compatibility percentage. Pass, super like or smash.
• AI matching. Profiles, interests and intent give the matching more context than a single swipe, and it ranks suggestions by compatibility, shared energy and how likely a conversation is to start.
• Likes and top picks. Who liked you, unlocked with a subscription.
• Chat. Messages and matches in one place, with photo sharing and search.
• Subscriptions and boosts. Free users get 5 swipes and 1 super like a day. Paid plans (3 days, 14 days or a month) unlock unlimited swipes and super likes, seeing who liked you and filters such as interests, height and religion. Boost points can be bought separately.
• Safety. Reporting profiles, a report list and community guidelines.

About the images

Member photos are blurred and names are replaced to protect the people on the platform.