Kostiantyn R.

I am a web developer with 10+ years of experience and a Master's degree in Software Engineering. I specialize in building custom web calculators, forms, and interactive web applications that help businesses generate leads, automate calculations, and improve user engagement. I have worked on a wide range of projects, from simple calculators to complex logic-based tools with API integrations, dynamic data processing, and CRM connections. What I can do for you: Build custom web calculators (finance, pricing, ROI, etc.) Create multi-step forms and quizzes with logic Integrate calculators with APIs, Google Sheets, or CRMs Embed solutions into any website Optimize performance and user experience Tech stack: JavaScript, jQuery PHP, MySQL HTML5, CSS3 AJAX WordPress, OpenCart Yii2 I focus on clean, reliable solutions and clear communication. Most of my projects are delivered as ready-to-use tools that can be easily integrated into your website.