Frontend Engineer working across product development, developer tools, real-time systems, web performance, and agentic AI.

I enjoy building technically challenging products that solve real problems for both users and developers.

📍 Spain · Open to Remote / Relocation
💼 LinkedIn: https://linkedin.com/in/denys-kuchma
📧 Email: den.kuchma10@gmail.com

I'm a Frontend Engineer with experience building production products, internal platforms, developer tooling, real-time systems, and AI-driven automation.

I primarily work with JavaScript, TypeScript, and Vue, with additional experience in React. I enjoy the parts of engineering where things get more complex: architecture, performance, integrations, real-time communication, automation, and developer experience.

My recent work has also moved deeper into developer tooling and agentic AI, including multi-agent systems, browser automation, test generation, MCP integrations, and testing infrastructure.

I like building things that are useful, reliable, and maintainable, whether they're used by end users or other developers.

• Owned frontend development for a production marketplace and internal CRM as the sole Frontend Engineer
• Built production real-time audio, video, and chat systems using WebRTC and WebSockets
• Improved Core Web Vitals, frontend performance, and build architecture across production applications
• Built partner integrations and embeddable SDK solutions
• Contribute to the next generation of CodeceptJS and developer tooling around testing and automation
• Built autonomous multi-agent AI systems for exploratory testing, browser automation, and test generation
• Developed AI agent infrastructure and MCP integrations connecting LLMs with developer and testing workflows

• Frontend & Product Engineering
• Developer Tools
• Agentic AI Systems
• Frontend Architecture
• Real-Time Systems
• Performance Engineering
• Automation Infrastructure
• Developer Experience

JavaScript (ES6+), TypeScript, Vue.js, React

LLM-powered agents, multi-agent workflows, MCP, tool calling, browser automation, test generation

Pinia, Redux Toolkit

HTML5, CSS3, SCSS, Tailwind CSS, Bootstrap, MUI

REST, GraphQL, WebSocket, WebRTC

CodeceptJS, Playwright, Cypress, Vitest, Jest, React Testing Library

Vite, Webpack, Node.js, Docker, Git, CI/CD

• Agentic AI and multi-agent automation
• Developer tools and testing infrastructure
• Browser automation and test generation
• Modern frontend architecture
• Real-time applications
• Product integrations and performance

💬 Feel free to connect or reach out to discuss frontend engineering, developer tools, agentic AI, testing, or product development.