Denjeo is a software studio in Minneapolis. We design and build websites, web and iOS apps, and internal tools for small businesses, nonprofits, and founders.

Run by Denis Jeong Plaster. Available for new projects. denjeo@gmail.com

Work

BeeHeard An app that helps couples communicate more calmly, with AI-guided message coaching and check-ins. Web and iOS. beeheard.io · App Store
FundKeeper Finance, donor, and grant management for nonprofits. A subscription product with Stripe billing. fundkeeper.org
Adoptee Social Groups, local events, and community for adoptees. adopteesocial.com
Talk the Town Learn a language by walking around a neighborhood and talking to the people in it. talkthetown.com
Camp UniStar Programs, season information, and registration for a volunteer-run camp. campunistar.org
AK Connection Site, event calendar, shop, and a photo-gallery service for a Korean adoptee community organization. akconnection.org · Photo galleries
Mya Sun Artist site: music, videos, and upcoming shows. myasun.com
Purple Highs Events, podcast, and media for a music community built around the purple sound. purple-highs-hub.vercel.app

Also online

Smaller things we built and keep running.

TaskForge AI-assisted task memory for engineers working in Azure DevOps.
Blitz Arcade Daily word and number arcade games.
React Practice Pad Short, repeatable React drills.
TrackLink A DJ's memory for which songs mix well together.
PointMove Learn K-pop choreography point by point.
Hallyu Hunt A GPS creature hunt through Korean culture.
Smart Meal Planner Plan the week and shop in one trip.
BeatForge Studio A browser drum machine with AI beat matching.
Homegrown Hub A directory of apps built by friends.
Crystal Dawn A real-time strategy game in the browser.
Mya Music Map Booking CRM for Twin Cities performers. Private beta.
TradeLab A workspace for trading strategies. Private beta.

Services

Websites: Marketing sites, nonprofit sites, artist sites. Designed and built, usually on Next.js and hosted on Vercel, with a CMS if you need to edit it yourself.
Web and iOS apps: Accounts, billing, dashboards, and the flows in between. App Store releases included.
Internal tools: Client portals, admin panels, and automations that replace the spreadsheet.
Retainers: A senior developer a few days a month for teams that have already shipped and want to keep moving.

How it works

Every project starts with a short call and a written scope with a fixed price. The work ships to a live URL every week, so you see it as it is built instead of at the end. You own the code, the domain, and the accounts.

About

Denjeo LLC is run by Denis Jeong Plaster, a developer in Minneapolis. Most of the work is Next.js, React, TypeScript, and Postgres, with Swift for iOS, hosted on Vercel. The studio is one person, so the person you talk to is the person who builds it.

Everything on this page is live. Click through.