Vitaliy Koshin

• Project description: migrated site to new framework , implement payment system to project (stripe, multicards, paypal, lpb, payop, paysafe, paysafecard, segpay), implemented of search engine, implemented of queue, created websocket chat, created video private chat, created a server to handle push notifications and etc.
  Used technologies:ZF1(zend framework 1), mysql, solr, websocket(ratchet), Memcached, rabbitmq, Smarty, ffmpeg, ajax, javascript, jquery and etc.
  Role in project:PHP developer and front-end developer

• Building a WebSocket-powered chat application to enable real-time, bidirectional communication between users
• Building databases and table structures for web applications.
• Conducted data modeling, performance and integration testing.

Engineered a web scraping solution leveraging RapidAPI's infrastructure. The service incorporates diverse techniques, such as HTTP GET requests, cURL with tailored headers, and headless browser with proxy IP configuration, to efficiently extract web content from a wide range of websites.

• Built databases and table structures for web applications.
• Tested and deployed scalable and highly available software products.

• Engineered a full-stack coupon code website utilizing Golang's robust ecosystem. The backend leverages PostgreSQL for reliable data storage and Redis for high-performance caching. The frontend employs server-side rendering techniques to optimize SEO and initial page load times.
• Enhanced user experience by designing and implementing responsive web applications using HTML, CSS, and JavaScript.
• Collaborated with cross-functional teams to develop software products within tight deadlines.
• Optimized website performance with efficient coding practices and regular performance audits.
• Contributed to the successful launch of new products through diligent testing, debugging, and documentation efforts.
• Demonstrated adaptability by quickly learning new technologies as required for specific project needs.
• Developed clean, readable code following best practices in order to maintain a scalable, easily maintainable application architecture.

• Contributed to a dating platform as a Golang developer for a year. Implemented a real-time video streaming solution utilizing the Flashphoner API and developed a robust push notification server to deliver timely updates to users, enhancing the overall user experience.
• Worked closely with clients to gather requirements and translate them into technical specifications for implementation.
• Continuously updated skills through training courses, workshops, and self-study—staying current on industry trends and emerging technologies.
• Built databases and table structures for web applications.
• Corrected, modified and upgraded software to improve performance.

• Over the course of 2012, I engaged in multiple web development projects, showcasing my proficiency in PHP and diverse technologies
• I contributed to the development of Drupal modules for domain sales utilising the EPP protocol
• Additionally, I played a role in finalising a website with Drupal 6, participated in building a site for LIFE, and developed a parser for Ukrainian bank sites for UBR, utilising PHP and Zend Framework

• In December 2012, I contributed as a Front-end Developer to the finalization of a website with Drupal 7
• Moving into January 2013, I focused on theming and optimising for IE7-IE9 in a project at vicotec, playing the role of a Front-end Developer
• During the same month, I engaged in the finalization of another project at kryhitka, where I took on the responsibilities of both a Back-end and Front-end Developer, utilising Drupal 6 and Ubercart 2
• In February 2013, I continued my dual role as a Back-end and Front-end Developer in the finalisation of a website at autoshield, utilising Drupal 7 and Ubercart 3 technologies