Rafal W.

Hello, My name is Rafal, and I’m a senior back-end developer from Poland with over 15 years of experience in PHP and business application development. I design scalable, testable systems — including custom CRMs, integrations, and high-performance reporting tools. Recent work includes: - Custom CRM using raw OOP PHP with Symfony components: price matrices, scheduling, permissions, invoices, Stripe/Twilio integrations - Laravel-based CRM for the US financial industry with large-scale reporting (millions of records daily), acquired by NMI I’m open to long-term collaborations, available in your time zone, and comfortable working in international teams. I’ve successfully collaborated with clients from the US, Germany, and Australia for over a decade. Technical skills: - PHP (Expert): Raw OOP PHP, design patterns, scalable architectures - Frameworks (Expert): Symfony, Laravel, CodeIgniter - Testing (Expert): Unit tests, integration tests, TDD/BDD, debugger - Databases: MySQL (Expert), PostgreSQL (Intermediate) - DevOps: Docker (Expert) - Front-end (Expert): JavaScript, jQuery, CSS - Java (Intermediate), Spring (Intermediate) - Python (Intermediate): AI modeling with TensorFlow, Scikit-learn, NumPy, Keras - 3rd Party Integrations: Twilio (SMS), Mailgun and Mandrill (Email), Stripe (Payments) Education: Master of Arts in Marketing – Silesian University of Technology, Poland IT Engineering – Silesian University of Technology, Poland Best regards, Rafal