Software and infrastructure
for production.
I build and operate systems that need to stay reliable, observable, and secure. Cbox brings that work into products, open source tools, and consulting.
Products
Cbox ID, Telemetry, Billing, Cortex, Status and Assistant. Run them yourself where they are open source, or let us host them.
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Open source tools for PHP, Laravel, and Statamic. Queue autoscaling, telemetry, system metrics, and health checks for applications in production.
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From business and product problems to architecture, infrastructure, and production. Work directly with me on system design, reliability, and security.
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Sylvester Damgaard
Founder of Cbox and Principal Software Engineer at Geocodio. Years as a CTO, founder, and architect, building and operating systems since 2000. My work connects business and product decisions with architecture and production.
Read the full story →Products
Run them yourself where the code is open source, or let us host them. Every product has a managed option.
Open Source Packages
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A zero-runtime-dependency DNS toolkit for PHP. Speaks the wire protocol over raw sockets to read answers straight from a zone authoritative nameservers, plus domain verification, DNSSEC validation and intoDNS-style diagnostics.
Prometheus exporter for PHP-FPM. Collects metrics from FPM pools, opcache, and Laravel queues via FastCGI. Multi-site support.
PID 1 process manager for Docker containers. Handles signal forwarding, zombie reaping, PHP-FPM auto-tuning, health checks, and Prometheus metrics.
A gateway-agnostic billing engine for Laravel: catalog, subscriptions, real-time usage metering with hard limits, a double-entry ledger, wallets and credits, invoicing and pricing. The framework peer to laravel-id.
The DNS toolkit for Laravel: authoritative lookups, domain-ownership verification, DNSSEC validation and intoDNS-style diagnostics, exposed through a facade, Artisan commands and validation rules.
A Laravel-native auth and identity framework you bind into your own app. Central login, enterprise SSO (SAML/OIDC), SCIM directory sync, RBAC, billing-fed entitlements and a tamper-evident audit trail, all interface-driven and deny-by-default.
From the Blog
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pm.max_children Is a Guess
Every PHP-FPM config starts with a number someone guessed. Fine for one app, but on a box running fifty pools that share the same RAM, it's how you starve some sites and pay for idle workers on others. So I built a tool that measures what workers actually cost and sizes the ceilings from that.
How Hard Can US Sales Tax Be
I was building a billing engine, so I had to handle tax. The EU was hard but knowable. Then I looked at the US and said the sentence that sits right at the peak of the Dunning-Kruger curve. What came out the other side was not tax logic, it was an ETL pipeline against forty government websites.
One Identity Layer Instead of Five
Every product needs login, organizations, roles, SSO and an audit trail. I had built that more than once, a little differently each time. Identity is the last thing you want five diverging copies of, so it became laravel-id: a contract-driven auth and identity framework for Laravel.
Let's build something
that lasts.
Need an architecture review, help with a production problem, or a second opinion on how your system should work? I am happy to talk.
Get in touch