Vladyslav Radchenko

I offer 5 years of hands-on experience designing, developing, shipping, and maintaining large-scale products
where availability, performance and security are paramount. I have established myself as a versatile web
developer & problem solver who enthusiastically takes on new problems across the full-stack.
Specializations: PHP, SQL, JavaScript,, React, Woocommerce & Wordpress, CSS & HTML , Docker

createIT, Warsaw, Poland Dec 2022 – March 2022
Full Stack Web Developer
Improving security in numerous mid and large-scale projects has been a key focus of my work. Through my
efforts, I have been able to enhance the security posture of these projects and help mitigate potential risks and
vulnerabilities.
● One of my responsibilities is to prevent products from CORS, XSS, and brute force attacks. This
involves implementing appropriate security measures to protect against cross-origin resource sharing,
cross-site scripting, and brute force attacks. By taking proactive measures, I can help ensure that our
products are secure and protected from potential threats.
● Mentoring junior developers
● Optimized database performance through the use of optimization techniques and queries
● SEO optimization

Tech stack: Sage, PHP (OOP) AJAX, WP-cli, SQL Woocommerce , ,Docker , Jenkins , MVC , Bedrock , Composer ,
Laravel-mix , Javascript , jQuery , React.js , SQL , HTML , SASS, Query Monitor, Google Analytics, Google Search
Console

Develtio, Warsaw, Poland Aug 2021 – Dec 2022
Web Development Engineer
Building a large-scale ecommerce products
● I have experience working with Big Data and successfully launched it with our API and Google Maps.
Through this project, we were able to significantly reduce the load time for client information and
locations from 2 hours to just 3 seconds.
● Solved many security issues across the full-stack while being the security champion on the team.
● Worked with big client’s databases , created custom APIs
● Conducted code reviews to ensure that all projects met the
highest standards of quality and security
Tech stack: Sage, Wordpress & Woocommerce PHP (OOP) , SQL , AJAX ,Docker , Jenkins , MVC , Bedrock ,
Composer , Laravel-mix , Javascript (OOP) , jQuery , React.js , SQL , Tailwind , HTML , SASS

Leonardo, Katowice, Poland Jun 2020 – Aug 2021
Full Stack Web Developer
Building a mid-scale web apps & ecommerce products
● I have experience mentoring trainees and junior developers and conducting code reviews. I
understand the importance of these tasks in the software development process and have honed my
skills in providing guidance, support, and constructive feedback to help others develop their skills and
produce high-quality code.
● Contributed to the design of a big data application capable of answering analytical queries with
latency below 10 seconds on terabytes of constantly updating data.
Tech stack: PHP (OOP) , SQL , Bedrock , Composer , Webpack , Javascript , jQuery , Vue.js , SQL , Vagrant , HTML
, SASS , Google Search Console , Google Analytics
SpinDigital, Katowice, Poland June 2019 – Jan 2020 2021
Full Stack Web Developer
Launched 5 large scale projects and 7 successful plugins
● Developed and maintained ecommerce websites
● Created custom add-ons and themes for websites, using Advanced Custom Fields (ACF) to enhance
functionality and user experience
● Improved website performance and speed through the use of optimization techniques, resulting in
increased traffic and sales
Tech stack: Git Bash, SQL, PHP, MVC , ACF, Composer, Javascript, jQuery, Woocommerce , Wordpress ,
Bedrock, HTM, SASS
Passion Connection LTD, London , United Kingdom June 2017 – Feb 2020
Junior Full Stack Developer & Jr.SEO Specialist
● Conducted keyword research to optimize websites
● Analyzed website traffic and search rankings
● Implemented on-page and off-page optimization strategies
● I specialize in supporting large-scale PrestaShop projects by fixing security and performance issues
● Maintaining SMM campaigns.
Tools and Technologies: Prestashop , Woocommerce , PHP , Javascript ,. HTML & CSS , aHrefs , Google Analytics,
Semrush, Adobe Photoshop , Adobe Illustrator, Facebook & Google Ads

Bachelor's degree of Computer Science & Networking | WSB University in Dabrowa Gornicza (3.5 years)