api
Authorization scopes let customers limit what an API key can do. The design space is wider than it looks: too few scopes leave customers exposed to credential theft, too many scopes overwhelm customers and produce inconsistent application. Most APIs that get scopes right start small and iterate
api-design
CORS is the browser policy that controls which origins can call your API from JavaScript. Get it wrong in the permissive direction and you create CSRF vulnerabilities; get it wrong in the restrictive direction and customers cannot integrate from browsers at all.
postgres
SECURITY DEFINER functions let a function run with the privileges of its owner rather than its caller. This is deliberate privilege escalation, useful for tightly-controlled operations and dangerous when written carelessly. The mechanics are simple; the failure modes are not.
api
Webhook signature verification is the boundary that determines whether your integration is a security feature or a security hole. Most webhook receivers we see have subtle verification bugs that pass casual review but fail under adversarial conditions.
api-design
Customer impersonation is the highest-trust feature in your admin tool: it lets support staff see exactly what a customer sees. It is also the easiest backdoor to build accidentally, and a small set of patterns separates the safe implementations from the dangerous ones.
postgres
The file that decides who can connect, from where, and how they prove who they are. Most production incidents involving Postgres auth come from misreading the order of evaluation.
api-design
Most webhook docs describe the signing mechanism. Far fewer describe how to rotate the signing secret without breaking every customer integration. The patterns that work are simple but underused.
engineering
Most teams use a single Postgres superuser for everything and discover the cost when they need to audit access, rotate credentials, or grant a contractor read-only access. A small amount of role design pays for itself the first time.
security
Disk-level encryption protects data at rest from physical theft. TLS protects it in transit. Neither protects sensitive fields from the queries you accidentally write or from compromised application code. Field-level encryption fills the gap, with patterns and costs that matter.
engineering
Webhook signature verification protects integrations from forgery, replay, and accidental misrouting. Almost every API gets the basic case right and the rotation story wrong, which is why secret rotation is the security improvement most teams quietly never make. The patterns that work in production.
engineering
The connection string is one of those tiny configuration values that compounds into a major operational headache when treated casually. The patterns that hold up are the ones that take the credential lifecycle seriously from the start.
engineering
Service mesh marketing tells you that mTLS-everywhere is the modern security baseline. The honest answer for most teams is that simpler patterns achieve nearly the same security with a fraction of the operational overhead, and the mesh becomes correct only at a scale most teams do not reach.