Senior PHP / Laravel engineer with 12+ years of building backends: REST and user-facing API design, PostgreSQL, queues, and the boring reliability work that keeps APIs predictable. On the frontend I work in Livewire and Vue.js.

Before the web I spent a decade in embedded and IoT, writing firmware in C for Atmel AVR and PIC. That is where I learned to keep data contracts strict and to treat edge cases as the normal case.

I use AI every day, in the products and in the editor, and I know where it breaks. So the model gets a strict schema and deterministic tools, and the tests, not the model, say when the work is done.

Available for remote contract work across the EU. Czech OSVC, B2B only, part-time welcome.

• captchaapi.eu - GDPR-compliant proof-of-work CAPTCHA, EU-hosted
• billify.cz - invoicing for Czech businesses; an LLM reads received PDF invoices into the monthly VAT return, with the exchange rate from a tool and a human confirming every row
• laravel-blog.cz - writing about Laravel and AI-assisted development

• exile2exile - a free Path of Exile 2 companion with a build planner, passive tree, loot filter generator and shareable builds. Laravel 13 on PHP 8.4 with React, Inertia and TypeScript, PostgreSQL and Redis, automated game-data releases and CI contract tests. Running at poe.rajtik.com
• captchaapi/laravel - official Laravel SDK for captchaapi.eu, with native Livewire support
• poe2-toolkit - eight MIT-licensed TypeScript packages on npm that exile2exile is built on: GGPK extraction for game data, a headless passive-tree geometry engine and a WebGL renderer
• weather-station - a balcony weather station that forecasts its own next six hours. My own ESP32 firmware in C++ (I2C / I2S sensors, rain heard in the microphone spectrum, KiCad schematics), a Laravel API and dashboard, and scikit-learn models trained on eight years of Czech Hydrometeorological Institute (ČHMÚ) records, scored live against persistence. Versioned wire protocol, idempotent ingest. Running at weather.rajtik.com
• pis-cesky - a Claude Code plugin that teaches AI to write Czech that does not read like a translation. Rules derived from human-written Czech instead of a phrase blacklist, and a proofreading agent that never sees the brief

Published on Packagist, WordPress.org and npm.

Backend - PHP, Laravel, REST API design, PostgreSQL, MySQL, Redis, queues
Frontend - Livewire, Vue.js, Inertia, React, TypeScript
Practice - Pest, PHPUnit, PHPStan, Docker, CI/CD, SCRUM
AI - LLM integration (Claude, laravel/ai, structured output, tool use), Claude Code, Python, scikit-learn
Also - embedded C (Atmel AVR, PIC, ESP32), IoT telemetry

rajtik.com - CV - LinkedIn - X

Pilsen, Czech Republic (CET). Reachable 10:00-19:00.

Open-source work is pinned below.