Unios

Overview

• TwinCurrent is building Unios, a multi-tenant SaaS platform for student unions and member organisations. The platform is in development, and IBP Union (CBS) is the intended first tenant. The platform was born multi-tenant: each organisation is a tenant with its own branded site, content, and members, and the architecture is ready to roll out across more student organisations, with the plan that TwinCurrent runs the underlying infrastructure as a done-for-you service.

• The centrepiece is an admin Site Builder: a page builder that lets each tenant's site be composed and published without touching code. TwinCurrent designs and builds the whole stack and will operate it, so organisations get an evolving product instead of a one-off project hand-off.

The Challenge

• Student unions need professional, distinct websites but rarely have in-house engineering to build or maintain them

• Running a separate codebase per organisation does not scale and multiplies maintenance

• Content and layout changes must be possible without a developer in the loop

• An inherited legacy system (IBP) carried thousands of records and a sprawling schema that needed migrating cleanly

• Each tenant's data must stay strictly isolated under role-based access

System Architecture

• A Rust/Axum API on Railway holds all business logic and enforces tenant isolation, with SQLx over PostgreSQL for type-safe queries and Cloudflare R2 for object storage. Several Next.js frontends on Vercel (the public marketing site, the admin console, and the tenant renderers) consume the same API, so one platform serves every organisation.

• Migrating off the legacy IBP system was a first-class design constraint, not an afterthought. We moved 3,000+ rows of IBP's existing data into the Unios production database and used the migration as a forcing function to consolidate the schema from 60 tables down to 24, asking of every table whether it would generalise to a second tenant before any data landed.

The Solution

• Admin Site Builder

  A page builder in the admin console lets each tenant compose and publish its public site (sections, content, and layout) without a developer in the loop.

• Role-based multi-tenancy

  Every organisation is an isolated tenant. Access is governed by roles so members, editors, and admins only ever see and change their own data.

• Multiple frontends, one platform

  Public site, admin console, and tenant renderers are separate Next.js apps that all call the same Rust API, one source of truth for many surfaces.

• Consolidated data model

  The inherited 60-table schema was reduced to 24 by generalising tables across tenants instead of mirroring a single source system.

• Legacy migration

  A migration script moved more than 3,000 rows of IBP's existing data into the Unios production database without losing history.

• Planned hosting by TwinCurrent

  Once the platform launches, TwinCurrent runs deployment, monitoring, and evolution so organisations consume it as a service, not a hand-off.

Integration Highlights

• Railway

  Hosts the Rust/Axum API and PostgreSQL with managed deploys.

• Vercel

  Serves the public, admin, and tenant Next.js frontends.

• Cloudflare R2

  Object storage for tenant media and assets, no egress fees.

Tech Stack

• React + Vite

  Admin and tenant frontends (marketing site in Astro)

• Rust / Axum

  API and multi-tenancy business logic

• PostgreSQL / SQLx

  Type-safe primary data layer

• Railway + Vercel + R2

  Hosting, deploys, and object storage

Outcomes

• In development, with IBP Union as the intended first tenant

• Born multi-tenant and architecturally ready to roll out across more student organisations

• The admin Site Builder lets non-technical staff compose and publish tenant sites

• Schema consolidated from 60 to 24 tables, cutting maintenance surface

• 3,000+ rows of IBP's existing data migrated into the Unios production database

• Planned to be hosted and run by TwinCurrent, so the product keeps evolving

Need a platform like this?

Unios is our own multi-tenant platform and it is in development. If your organisation needs something similar, let's talk.

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