Client Background
A venture-backed SaaS startup building workflow automation, contract approvals, and invoice auditing software for enterprise commercial clients across North America and Europe.
The Challenge
- Data Isolation Guarantees: Enterprise buyers refused to sign contracts unless the SaaS could guarantee strict tenant database isolation to prevent cross-account data leakage.
- Dynamic Metered Billing: Invoicing required tracking API executions and active team seats with automated pro-rated billing via Wise and PayPal.
- Multi-Region High Availability: Global enterprise customers demanded 99.95%+ uptime SLAs backed by automated disaster recovery failover.
The Engineering Solution
TheWebSolve architected an enterprise-ready cloud SaaS infrastructure:
- Schema-Isolated Multi-Tenancy: Implemented dynamic schema switching on PostgreSQL, giving every corporate customer an isolated database schema while sharing an efficient application compute pool.
- Automated Metering & Billing Engine: Connected webhook-driven event listeners to calculate monthly usage thresholds and generate itemized PDF invoices.
- Containerized Microservices on AWS ECS: Deployed autoscaling Docker container tasks behind Application Load Balancers with Redis caching for tenant session tokens.
Measurable Outcomes
- 450+ Corporate Tenants Onboarded: Zero data leak incidents across high-security enterprise clients.
- 65ms P99 API Latency: Highly optimized schema indexing and Redis caching kept queries blazingly fast.
- SOC2 Architectural Alignment: Delivered comprehensive documentation and architectural diagrams enabling the client to pass external third-party security audits.
“
Scaling a multi-tenant platform without tenant data leakage requires top-tier backend architecture. TheWebSolve built our core SaaS engine from day one to withstand enterprise security scrutiny.