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A same-day substitute still has to be vetted to be alone with kids. We built the platform that verifies first and books second.
OASIS: An On-Demand Substitute-Teacher Marketplace
Pre-school and childcare centers had no fast, vetted way to fill a teacher absence, and the tools that existed didn’t fit early-childhood staffing, where a same-day substitute still has to clear I-9, TB, and CPR/First Aid checks. We built OASIS from scratch: a two-sided marketplace where schools post and book substitutes, teachers carry verified compliance documents on their profiles, and Stripe Connect settles each booking with a commission. A staffing gap that used to mean phone calls now closes in the app.
The Impact
A founder building the staffing layer early-childhood centers were missing.
OASIS is an on-demand substitute-teacher marketplace for pre-school and childcare centers in the US. Its model is two-sided: schools and substitute teachers transact through the platform, and the business earns a commission on each booking. The client came to us through our sales team and chose us on the strength of similar marketplace builds we’d already shipped. They wanted a collaborative partner who understood the space, not just a shop that would take an order.
A same-day staffing need with no system to serve it.
When a teacher calls out at a childcare center, the seat still has to be filled, and it has to be filled by someone who is actually cleared to be alone with young children. There was no platform that did this for early-childhood staffing. General tools didn’t fit, because they treat a substitute like any gig worker and ignore the part that matters most here: the I-9, the TB test, the CPR and First Aid certification. Schools, substitute teachers, and the ops team in the middle were all working without a system built for the way this market actually clears a booking. The product simply didn’t exist yet, and the existing options weren’t close enough to build on.
Three roles, one transaction spine, compliance as the gate.
We structured the build around the three roles that move a booking from open to filled, the school posting the need, the substitute accepting it, and the admin/ops layer overseeing both. Each got its own workflow, and all three read from the same booking and payment state so nothing drifted between them.
Stripe Connect went in as the spine. In a commission marketplace, the money flow isn’t a feature you add later, it defines how a booking is structured, how payouts reach teachers, and how the platform takes its cut. Building around it from the start meant every booking carried its payment logic instead of being retrofitted with one.
We treated compliance as a gate, not a form. In early-childhood care, an unvetted substitute isn’t a UX problem, it’s a non-starter. So I-9, TB, and CPR/First Aid documentation lives on the teacher profile and stands between a teacher and a booking. We built the product US-first, defaulting to USA, Texas, and US states and cities, because the compliance model and the market are American from the ground up.
A two-sided marketplace across three roles, plus a coaching-center module.
A dedicated team, ~16 months, business analysis and design up front.
This was a dedicated-team engagement that kicked off on 05 May 2023 and ran through active development into at least September 2024. The team paired two business analysts with two UI/UX designers under a project manager, working directly with the client sponsor. That weight on analysis and design up front mattered for a Greenfield product in a regulated corner of EdTech, the rules of who can be booked, and what has to be verified first, had to be mapped before screens were drawn. The marketplace, the payment flow, and the compliance model were specified together, so the booking a school sees and the payout a teacher receives are two ends of the same defined transaction.
From no product to a working marketplace for a market that had none.
OASIS now exists as a working two-sided platform where there was no product before. A childcare center can find and book a vetted substitute, a teacher whose I-9, TB, and CPR/First Aid documents are on file can pick up the work, and Stripe Connect settles the booking and the platform’s commission in the same motion. Admin and ops oversee both sides and the compliance layer from one place, and the coaching-center module extends the platform beyond substitutes into live classes and graded assignments. The client has the infrastructure to grow across US states on a compliance model built for the market from day one.
Testimonials
"We came in with an idea and no platform. What mattered was that the team understood why the vetting couldn't be an afterthought, a substitute in a childcare room has to be cleared first, full stop. They built the booking and the compliance checks as one thing, and that's the part most people would have gotten wrong."
Greenfield Marketplaces Built on Trust
Launching a marketplace where trust and compliance are the product, not an afterthought? That's the kind of Greenfield build we structure from the transaction up.
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