Secure APIs & Backend Systems

The most common backend security mistake isn't a complex exploit. It's a secret that belongs on the server: an API key, a webhook signing key, an SMTP password, sitting in a frontend bundle or a client-side request header where anyone can find it in the browser's network tab. We build the server layer between your frontend and your providers, so credentials stay where they belong.

This Is for You If…

• You need a public API: contact form, lead capture, support tickets, app backend, and you want it resistant to abuse, injection, and runaway traffic.
• You're wiring email, webhooks, or third-party APIs and need the signing keys and credentials server-side, with structured error handling you can actually debug in production.
• Your team wants Node.js and TypeScript services with predictable request validation, structured logging, and a deployment path that your ops team can own after launch.
• You have a product plan and need the server side designed and built to match it.

How We Approach the Work

We treat every public endpoint as a small product: explicit contracts, input validation, rate limiting or proof-of-work where it makes sense, and least-privilege access to data stores and outbound providers. Security is architectural, not bolted on after the fact.

For a concrete walkthrough, see our secure contact API case study: Fastify and TypeScript, ALTCHA proof-of-work spam resistance, PostgreSQL persistence, CORS, and SMTP delivery with credentials confined entirely to the server.

What We Typically Deliver

• REST-style HTTP APIs with typed validation, consistent error shapes, and documentation your mobile or web clients can rely on without surprises.
• Outbound integrations: transactional email, webhooks, and vendor APIs, with retries, idempotency where needed, and configuration documented for your ops handoff.
• Operational basics: environment-based config, health endpoints, structured logging, and runbooks so your team can own the service after launch.