Security
Security is not a feature added at the end of a project. It is a design constraint considered throughout architecture, development, deployment, and maintenance.
Security Philosophy
Our engineering security approach is based on four operational guidelines:
Application Security
We design software with strict authorization checks. Authentication tokens (JWT, OAuth) are validated at the system boundary, and user actions are checked against hierarchical Role-Based Access Control (RBAC) rules. All inputs are validated on the server side using strict schema contracts, and request limits are configured at the API gateway to prevent resource starvation.
Infrastructure Security
We run client platforms on **Cloudflare Pages and Workers**. All network traffic is encrypted using HTTPS and TLS 1.3. Environment secrets (API keys, database tokens) are managed securely using cloud secrets stores and are never committed to repositories. Code is isolated inside serverless worker runtimes, preventing cross-site scripts from accessing shared system resources.
Data Protection
We implement database-level data protections. Connection strings use TLS encryption in transit. Encryption at rest is handled by the underlying infrastructure (such as Cloudflare D1 or managed AWS RDS volumes). We configure daily database backups, verify recovery pipelines, and enforce strict data retention limits based on client requirements.
Multi-Tenant Security
We prevent cross-tenant data leakage by enforcing strict tenant isolation boundaries:
Physical Isolation
Splitting tenant data into completely independent database instances (e.g., SQLite files per salon in BarberBase), removing the possibility of cross-client data leaks.
Logical Isolation
Using shared tables with tenant ID filters. We write query validation drivers that automatically inject tenant ownership checks, blocking access to other customer rows.
API Security
We design APIs contract-first using **OpenAPI**. All incoming requests are validated against schema definitions on the server. We implement idempotency keys to prevent duplicate transactions, verify signature headers on incoming webhooks (e.g. Stripe webhooks), and enforce token rotation policies.
Development Security
We write clean code. Every repository change undergoes senior peer review before deployment. We pin dependency versions inside package locks, run automated vulnerability checks, and limit third-party libraries to the minimum required to reduce dependency vulnerabilities.
Privacy
We build systems with privacy by design. We enforce minimal data collection guidelines, storing only information required for operational workflows. The application codebases, database records, and hosting credentials belong entirely to the client, ensuring complete data ownership.
Known Limitations
We do not promise absolute safety. Systems are subject to deployment and operational boundaries:
Client Infrastructure Control
We write secure code, but final production safety depends on the client's cloud account settings, password rotation policies, and network firewall controls.
Eventual Data Recovery Limits
Recovering databases to a specific millisecond requires continuous write-ahead log (WAL) archiving, which increases storage costs and is only configured for high-concurrency systems.
Dependency deprecations
While we pin library versions to prevent build failures, third-party libraries require periodic security updates to address new vulnerabilities discovered over time.
No Certifications Included
We do not provide SOC2 or ISO certifications natively. We write code to meet these standards, but the client must complete the auditing process using their own business accounts.
Security Practice Matrix
| Area | Practice | Benefit | Limitation |
|---|---|---|---|
| Tenant Isolation | Isolated SQLite files per salon, row-level filters in shared databases. | Prevents cross-client data leakage. | Isolated databases complicate global database schema migrations. |
| Secret Management | Environment secrets stored in cloud key vaults, pinned dependency locks. | Prevents keys from leaking in public Git histories. | Requires manual configuration of staging and production pipeline variables. |
| API Validation | Server schema validation using OpenAPI specs, webhook header validation. | Blocks malformed payloads and prompt injections. | Slightly increases latency during parameter validation processing. |
| Network Encryption | HTTPS/TLS 1.3 enforced, Cloudflare WAF configuration. | Encrypts data in transit and blocks brute-force attacks. | Depends on domain name servers (DNS) configurations and certificate validity. |
Frequently Asked Questions
How do you secure APIs?
We design APIs contract-first using OpenAPI. We validate all inputs on the server, verify authorization headers (JWT/Bearer tokens) at the system boundary, and implement rate limits to prevent brute-force attacks.
Do you encrypt stored data?
Yes. Data is encrypted in transit using TLS 1.3. Encryption at rest is handled by the underlying infrastructure providers (such as Cloudflare D1 volumes or managed AWS RDS instances).
How are secrets managed?
Secrets (API keys, database credentials) are stored using secure environment variables inside Cloudflare Pages or AWS secrets managers. They are never committed to version control repositories.
How do you isolate tenants?
We isolate tenants physically by database (e.g. separate SQLite files per tenant in BarberBase), or logically using row-level filters that check tenant IDs at the database driver level.
Do you perform security reviews?
Yes. We perform internal code reviews and dependency audits for all pull requests. However, we do not provide external, third-party penetration testing reports; these must be contracted separately by the client.
How are backups handled?
We configure daily backups for database instances, set up cross-region replication, and document database recovery procedures in the project handbook.
Can you integrate client authentication?
Yes. We integrate standard authentication protocols (OAuth, SAML, Auth0, or custom token handlers) directly into SvelteKit backend layouts.
Do you support audit logging?
Yes. We configure structured JSON logging (Winston or Go loggers) that record request methods, tenant IDs, and execution outcomes, allowing you to trace system access patterns.
Who owns the application data?
The client owns 100% of the application codebases, database records, and hosting credentials. We do not store or access client systems post-handover.
How do you approach long-term maintenance?
We write standard-compliant, typed codebases, configure automated testing, and hand over a documented guide explaining how your developers can update dependencies and deployment configurations.
Every successful system starts with understanding the problem.
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