Case study · Marketplace development

Spare Space, from idea to live marketplace in five weeks.

Spare Space is a US marketplace, founded by a US team, with plans to expand globally. They came to us with an idea: let people rent out the space they don’t use. We built the whole marketplace from scratch, launched the first version in four to five weeks, and still run its technology as fractional CTO and lead software engineer.

Client
Spare Space, US marketplace expanding globally
Role
Fractional CTO and lead software engineer
Since
January 2026
Spare Space marketplace app: map search, hosts and renters
01

From an idea to a working marketplace.

No designs, no code, no platform. Just the idea of a marketplace where anyone can list unused space, from a garage or a spare room to an empty building or a piece of land next to a house, and others can rent it.

  • Product and technical decisions made with the founders
  • The full marketplace designed and built from scratch
  • First version live in four to five weeks
02

Built for both sides of the marketplace.

  1. 01

    Hosts list their space, with photos, location and pricing

  2. 02

    Renters search by location and book ahead

  3. 03

    Messaging between hosts and renters, inside the platform

  4. 04

    Flexible pricing: by the day, the week or the month

  5. 05

    Automated emails at every step of a booking

03

Real payments from day one.

Marketplace payments through Stripe Connect: renters pay on the platform, the platform keeps its fee, and hosts get paid out. Accounts and payments secured from the first release.

04

Still running it after launch.

After launch, we stayed in charge of the technology: maintenance, new features and technical decisions, as fractional CTO and lead software engineer.

Jacob, Spare Space

My experience with abZ and Marian have only exceeded my expectations. From the start he completely saw my vision with building my very specific website. I knew it was a hard task but he created it with ease it seemed. I got constant updates, smart suggestions, and honest professional feedback. I couldn't be happier with his work he has delivered. I would suggest him to any of my piers needing his service, and I can't wait to keep working with him with more of my ideas that I am confident he will deliver upon. If you are looking for high quality web development you have found the spot.

More work

Other case studies

Start a project

Have a marketplace idea?

We can take it from idea to live product in weeks, with real payments, and stay to run it.

  1. 01Tell us about it.A few lines on the goal, the deadline and what exists today.
  2. 02A reply within 24 hours.Useful questions and a proposed next step, in writing.
  3. 03Scope and price agreed before work starts.Projects from $2,000. Ongoing fractional CTO work is billed monthly.
Response time
Within 24 hours, 7 days a week