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Global Solutions Inc

Zero-downtime migration to a multi-tenant SaaS platform

Single-tenant deployments per customer consolidated into one multi-tenant Next.js and MongoDB platform with SSO, RBAC and audit logs — passing the first enterprise security review.

Next.jsMongoDBNode.jsRedisKubernetesAWSDistributed Queue
Industry
B2B SaaS
Region
United States
Duration
6 months
Team
9 engineers
Services
Custom SaaS EngineeringWeb Development

Impact

Release rollout time

1 h99%

Before: 120 h

Infra cost per tenant

42%58%

Before: 100%

Uptime

100.0%0.5%

Before: 99.5%

Live project preview

https://example.com
Open

The challenge

Each customer ran on a separately deployed copy of the product. Releases took a week to roll out across 140 environments, infrastructure costs grew linearly with every new logo, and enterprise prospects stalled on security questionnaires.

Our solution

Tenancy by design

A tenant context is resolved at the edge and enforced in the data layer, so no query can run without a tenant scope. Enterprise tenants can be promoted to dedicated databases without code changes.

  • SAML/OIDC single sign-on with SCIM provisioning.
  • Granular role-based access with an exportable audit log.
  • Tenant-by-tenant migration with dual writes and automated reconciliation.

Results

  • 140 environments consolidated onto one platform with no planned downtime.
  • Release rollout time cut from five days to under one hour.
  • Infrastructure cost per tenant reduced by 58%.

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