Service
SaaS Product Development Services
Hashorn builds SaaS products end-to-end. Multi-tenant data models, billing, observability, and security are first-class concerns from sprint one — not retrofits when you hit your first enterprise customer.
Why teams hire us
What we solve
The recurring patterns that bring product teams to Hashorn.
Single-tenant builds that need painful rewrites for enterprise contracts.
Billing systems shipped without idempotency or audit trail.
Authentication that doesn't support SSO or SCIM when the first enterprise asks.
Per-tenant data isolation enforced at the application layer (and bypassed by a junior engineer's untested query).
Observability that's missing the metrics you'll need at the first incident.
What you get
What we deliver
Concrete outcomes from every engagement, not slideware.
Multi-tenant data model with isolation enforced at the database layer.
Auth with SSO (SAML, OIDC) and SCIM-ready tenancy.
Stripe-based billing with idempotent webhooks and double-entry ledger primitives.
Per-tenant observability (Datadog, Sentry) and audit logs.
Admin console for ops with role-based access control.
How we deliver
Our process
Senior engineers run the work. AI handles the scaffolding. You see weekly progress.
01
Architecture
Tenancy model, billing rails, auth strategy, observability scope.
02
Foundation
Multi-tenant skeleton, billing, auth, audit log. First feature deployed.
03
Ship
Weekly demos. Each task carries Develop / QA / Security checklists.
04
Scale
SOC 2-aware practices, runbooks, on-call handover, optional retainer.
Stack
Tools and technologies
Engagement
How we work with you
Three models. Pick the one that fits your team, your stage, and your budget.
MVP project
Multi-tenant SaaS MVP, typically 8–12 weeks.
Dedicated pod
Ongoing SaaS engineering on monthly retainer.
SaaS rescue
Take over an existing SaaS codebase, stabilise, and extend.
Why Hashorn
What makes us different
Multi-tenant patterns shipped, not just diagrammed.
Billing and auth done by engineers who've handled the edge cases before.
Security and audit-trail thinking present in every sprint.
Async-first across US, UK, EU, and Middle Eastern overlap.
FAQ
Questions clients ask before we start.
Start your SaaS build.
Tell us what you're building, we'll tell you how we'd ship it.