Personal information hidden

Kryvobok Roman Valeriiovych

Full Stack Developer (OpenCart, Laravel, Vue.js, Nuxt.js, Node.js, TS, JS, SQL), remote

I only communicate via LinkedIn!

E-mail: [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)
Desired salary: $1,500 or $15/hour
Key Skills
• Back-end: PHP (7.2-8+), Node.js, Laravel, OpenCart 3+, Doctrine ORM
• AI integration into projects: OpenAI, Claude, DeepSeek, Gemini, and others
• Working with AI agents
• Creating Telegram bots
• Front-end if needed: JavaScript (ES5/ES6), TypeScript, Vue.js 3+ (Composition API), Nuxt.js 3+, HTML5, CSS3 (Bootstrap 3+, Tailwind CSS 3+)
• CMS & e-commerce
• Databases: MySQL / MariaDB / PostgreSQL — database design, indexing, query optimization
• API & integrations: RESTful API, Google/Facebook API, ChatGPT API and other services, OAuth2
• DevOps & infrastructure: Docker, Apache, Nginx, Linux (Debian/Ubuntu), terminal, Git, GitHub Actions, CI/CD
• Tools: Postman, X-Debug, XHProf, Gulp, Vite
• Principles: OOP, SOLID, MVC, DRY, KISS, Mobile-First, clean code
Experience (5+ years)
Full Stack Developer & Tech Support
2021 - present
• I analyze code written by other developers, find critical bugs and vulnerabilities, and implement stable fixes;
• I refactor back-end code, move business logic into services, add caching, and reduce system load;
• I optimize SQL queries and indexes, which improves application performance and API response speed;
• I have deployed and supported projects in Docker environments and configured CI/CD (GitHub Actions -> staging/production);
• I have configured Apache and Nginx, v-hosts, SSL, gzip compression, and SPA routing;
• I have worked with CLI and Bash scripts to automate routine tasks (backups, migrations, logs);
• I have integrated third-party services: Google, Facebook Pixel, ChatGPT API, and other services; I have also configured secure authorization through OAuth2;
• I have developed internal APIs for integration with CRM systems and payment gateways, and prepared technical documentation;
• I have optimized front-end performance: resource minification, lazy loading, and image optimization.
Languages
• Ukrainian — native
• English — intermediate (reading technical documentation, communication in chats)
• Russian — fluent

I am ready to join an ambitious team where I can work on complex technical tasks and continue developing in system architecture and optimization.