Proptech / Smart Living / Mobile + IoT

STAK — Intelligent Living

The digital layer of Behring Co's "Full Stack Real Estate" platform: one app where residents of 452 smart apartments at Oakland's 1900 Broadway unlock doors, book amenities, resolve building issues, earn rewards — and schedule a Tesla from the on-site fleet in seconds.

452 smart apartments5 Oakland locationsOne resident super-app

FlutterNode.jsGraphQLPostgreSQL

One platform running 452 apartments, two coworking locations and a shared Tesla fleet — used by more than 1,000 residents and members every day.

The STAK operations console showing a table of residents with their units, lease dates, parking bays and access permissions. Resident names are blurred out. — **Operations console**Users, leases, units, parking and access. Resident names blurred.

The STAK resident app's LIVE tab on a phone: a promo carousel, then a grid of eight service tiles — Visitors, Tap Room, Packages, Feedback, Work, Play, Pay Rent and Maintenance — above a row of local offers, with LIVE, WORK, PLAY and LOCKS along the bottom. — **LIVE — resident home**Visitors, packages, rent and maintenance reached from one screen.

The WORK tab, filtered by room size, listing bookable workspaces at 1950 Franklin — a podcast studio and two lounges — each with opening hours, capacity, floor, an hourly rate and a Book Now button. — **WORK — workspace booking**Studios and conference rooms filtered by size, priced by the hour.

The PLAY tab, filtered to BBQ Grill, listing two grills at 1900 Broadway with opening hours, capacity, floor and an hourly rate. The other filters read Fitness, Exterior and Golf. — **PLAY — amenity booking**Grills, gym and golf reserved through the same flow as a room.

The LOCKS tab showing one large door card reading B2-02 Elevator Lobby M with a LOCKED badge, above a grid of eight pinned doors — stair vestibules, lounges and terraces across several floors. — **LOCKS — door access**Pinned doors on the phone. This is the call that opens a lock.

The Tap Room screen, reached from the LIVE tab, with Menu and History tabs and a Top Rated sort. Four beers are listed, each with its brewery, star rating, style, ABV and a price per ounce, above a Pour Now button. — **Tap Room — self-pour**Residents pour their own. The tap bills the card already on file.

The challenge

Resident services, coworking operations, payments, reservations and door access ran as a fragmented set of separate systems across five properties.

What we built

A Flutter resident app, a React operations platform, and one API behind both — carrying payments, reservations, visitors, parking and access control.

How it works

The platform reaches into the building itself. A backend call doesn't end in a screen updating, it ends in a door opening, a bay assigned, or a Tesla booked.

Client: FlutterReact
Services: Node.jsGraphQL
Platform: PostgreSQLAWS

The result

One app runs door access, payments, amenity bookings and the Tesla fleet across 5 Oakland properties and 452 apartments — every day, for more than 1,000 people.

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