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AWS Case Study
PropTech SaaS
Application Security
Multi-Tenant ISV
BizCerebro.ai:
Security Embedded
Into the Pipeline
A growth-stage PropTech SaaS provider enforces per-tenant edge isolation, eliminates plaintext credentials, and gates every release with automated security scanning โ without slowing product delivery.
0
Plaintext Secrets in Source
0
Manual Certificate Renewals
100%
Pipeline Security Gated
BizCerebro.ai โ App Security Dashboard
Tenant Isolation
Edge
โ Per-tenant WAF
Plaintext Secrets
Zero
โ Secrets Manager
Pipeline Gate
Active
โ Block on findings
Cert Lifecycle
Automated
โ ACM auto-renew
WAF
Per-Tenant Rate Limits
โ Enforced
JWT
Edge Validation
โ Lambda@Edge
IaC
Scan Gate Active
โ Bitbucket CI
01
AWS Application Security Delivery
Embedding Security into a Multi-Tenant SaaS Delivery Pipeline for a PropTech ISV
About BizCerebro.ai
BizCerebro.ai is an India-based PropTech SaaS provider delivering multi-tenant real estate analytics to developers and enterprise customers. As a growth-stage ISV, the business must satisfy enterprise security due diligence without slowing product delivery โ a balance that required security to be embedded in the platform and the pipeline simultaneously.
The Challenge
Three compounding risks threatening a growth-stage multi-tenant SaaS platform
Shared-Platform Risk
On a multi-tenant platform, one tenant’s abusive traffic or one leaked credential could degrade or expose every other customer โ with no isolation mechanism in place to contain the blast radius.
Credentials in Code
Application credentials had accumulated in source and configuration over time, with nothing in the development workflow preventing new secrets from being committed to the repository.
No Release Gate
Nothing in the delivery path prevented an insecure change from reaching production. TLS certificates were managed manually, making certificate expiry an unmitigated outage risk for enterprise customers.
Solutions Provided
Security embedded at the edge, in the runtime, and across every release โ without slowing delivery
Per-Tenant Edge Protection
Authored an AWS WAF rule set with rate-based rules scoped per API class, so a single tenant’s burst or scraping is throttled in isolation without affecting other tenants โ alongside tuned OWASP managed rule groups.
Edge Authorization & Hardening
Deployed AWS Lambda@Edge to validate JWTs before requests reach the origin, inject the tenant identifier used for isolation, and apply hardened response headers including HSTS and Content-Security-Policy.
Automated Transport Security
Implemented AWS Certificate Manager with an auto-renewing certificate associated to Amazon CloudFront โ removing all manual certificate handling and eliminating expiry as an outage risk.
Credential Lifecycle
Migrated all application and database credentials to AWS Secrets Manager with IAM-scoped runtime retrieval and rotation โ eliminating static secrets from source and configuration entirely.
Pipeline Security Gates
Built secret scanning, dependency scanning, and infrastructure-as-code scanning into the Bitbucket pipeline with severity thresholds that block promotion. Amazon Inspector scans compute and container images, with findings aggregating into AWS Security Hub.
Result Outcome
Tenant isolation enforced, secrets eliminated, and insecure changes blocked before production
Tenant Isolation
Abusive traffic from any single tenant is now contained at the edge before it reaches shared application capacity โ protecting every other customer on the platform.
No Plaintext Secrets
All credentials are retrieved at runtime from Secrets Manager, and the pipeline blocks reintroduction of secrets into source โ closing both the existing and future credential risk.
Insecure Changes Blocked
Security findings above threshold prevent promotion, so vulnerabilities are intercepted before production rather than detected after โ shifting security left without friction.
Eliminated Certificate Risk
Certificate renewal is fully automated through AWS Certificate Manager, removing an entire class of outage from the platform’s operational risk profile.
Per-Tenant
Rate Limiting Enforced
Edge WAF rules scoped per API class โ tenant bursts isolated from shared capacity
Zero
Plaintext Credentials
All secrets migrated to Secrets Manager with IAM-scoped runtime retrieval
3
Pipeline Scan Gates
Secret, dependency, and IaC scanning blocking promotion on threshold findings
Zero
Manual Cert Renewals
AWS Certificate Manager auto-renews โ expiry outage risk permanently eliminated
Success Metrics
Measurable security improvements across the platform and pipeline
Per-Tenant Rate Limiting
None
โ
All API Classes
Rate-based WAF rules enforce tenant isolation at the edge across every API endpoint class
Application Credentials
In Source
โ
Secrets Manager
All app and DB credentials migrated to runtime retrieval with IAM-scoped access and rotation
Pipeline Security Gates
Zero
โ
3 Active
Secret, dependency, and IaC scanning gates block promotion on severity threshold findings
Certificate Lifecycle
Manual
โ
Fully Automated
AWS Certificate Manager automates renewal โ zero manual handling, zero expiry outage risk
Before
One tenant’s abusive traffic could degrade shared application capacity for every other customer on the platform
Application credentials had accumulated in source and configuration with nothing preventing new secret commits
Nothing in the release path prevented an insecure change from reaching production environments
TLS certificates were managed manually โ leaving certificate expiry as an unmitigated outage risk
Browser-side protections were unset, and JWT authorization occurred only at the application origin
After
Per-tenant rate-based WAF rules contain abusive traffic at the edge before it reaches shared application capacity
Application credentials are retrieved at runtime from AWS Secrets Manager with IAM-scoped access and rotation
Pipeline security gates block promotion on secret, dependency, or infrastructure-as-code scan findings
AWS Certificate Manager renews certificates automatically โ manual handling and expiry risk eliminated entirely
Lambda@Edge validates JWTs and applies hardened response headers (HSTS, CSP) before requests reach the origin
“
The engagement delivered application security that scales with the platform โ tenant isolation enforced at the edge and security controls embedded in the release path, so insecure change cannot reach production and no single tenant’s behaviour can compromise another.
Technology Stack
AWS Services & Tools Deployed
AWS WAF
Per-Tenant Rate Limiting
Lambda@Edge
JWT Validation & Headers
Amazon CloudFront
Protected Ingress
AWS Certificate Manager
Auto-Renewing TLS
AWS Secrets Manager
Credential Lifecycle
Amazon Inspector
Compute & Container Scan
AWS Security Hub
Finding Aggregation
Bitbucket Pipelines
Security-Gated CI/CD
AWS IAM
Runtime Secret Access
Secret Scanning
Pipeline Gate
Dependency Scanning
Pipeline Gate
IaC Scanning
Pipeline Gate
Accepting New Enterprise Clients
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