My standard: modern PHP 8 code with strict typing, clear structure, input validation and tests, so the software stays maintainable for years and survives platform updates.
What is included
- WHMCS modules: addons, server provisioning, registrar integrations, payment gateways, hooks and template customisations
- Plesk extensions and automation via the Plesk API
- Custom web applications and customer portals with PHP 8, Composer packages or Laravel
- REST APIs with authentication, signatures, rate limiting and audit logging
- Integration of payment providers (PayPal, Stripe, cryptocurrencies) and external services
- Security review of existing PHP applications: injection, CSRF, authorisation checks, secrets handling
- Modernising old code bases to current PHP versions without losing functionality
- WordPress and shop extensions when an off-the-shelf plugin does not fit
Typical assignments
- A hosting provider needs a WHMCS module that provisions servers automatically through a vendor API, including cancellation and billing.
- A customer portal gets a passkey login based on WebAuthn, with security review and documentation.
- An agency has a ten-year-old PHP 5 project lifted to PHP 8.3 and secured.
- A company needs a signed REST interface between website and ticket system.
Process
Request
Describe your needs briefly via the form, WhatsApp or the live chat.
Assessment
Within one business day you receive an assessment with effort, price and a proposed date.
Implementation
I do the work personally, remotely via secured access or on site, and keep you updated throughout.
Handover and invoice
Documented handover, then an invoice from KernelHost GmbH with convenient payment via kernelhost.com.
Questions about this service
Do you also develop WHMCS modules for other hosting providers?
Yes. Provisioning, registrar, payment and addon modules are among my most frequent assignments, including security review and update resilience.
How do you ensure security?
Input is validated strictly, database access is parameterised, secrets live outside the web root, and interfaces use signatures and rate limiting. On request I deliver a security report with the code.
Do you maintain modules after WHMCS or Plesk updates?
Yes. I build modules to survive updates and re-check them after major version jumps on request.
Remote for companies across Austria, combined with on-site appointments in Vienna on request.