Dmytro M.

React.js Developer | AI Integration | NestJS Node.js Next.js | React

🚀 Engineering Scalable Web Ecosystems from Concept to Production. I am a Senior Full Stack Engineer and Technical Lead with deep expertise in building complex, high-load systems. My approach focuses on creating flexible architectures that allow businesses to scale rapidly without accumulating technical debt. I manage the full development lifecycle: from designing robust databases and complex backend solutions in Node.js (NestJS) and Python (FastAPI) to crafting high-performance user interfaces with Next.js and React. 💡 Full Stack Expertise & Strategic Solutions: - Backend Architecture: Designing complex APIs and microservices using Node.js (NestJS) and Python (FastAPI) for AI workloads. I specialize in asynchronous data processing, message queues (RabbitMQ/Redis), and heavy query optimization. At Stepler — Sweden's #1 fitness app, 10M+ users — delivered high-load backend architecture with MongoDB optimization reviewed and validated by the core MongoDB team. - Modern Frontend (Next.js/React): Building fast, SEO-optimized web applications using SSR (Server-Side Rendering) and SSG. High focus on Web Vitals and seamless UX. - Browser Extensions (Plasmo): Unique expertise in developing sophisticated Chrome Extensions (Manifest V3) that function as standalone products or integrated ecosystem tools. - Database & Logic Design: Advanced knowledge of PostgreSQL, MongoDB, and Redis. I design data architectures capable of handling millions of records while maintaining peak performance. 💼 Featured Full Stack Impact: Enterprise SaaS Platforms: Developed modular ERP/CRM systems with custom business logic and complex role-based access control (RBAC). AI-Powered Tools: Integrated Large Language Models (OpenAI/Claude) into web interfaces, browser extensions, and Python AI microservices to automate user workflows. Real-time Dashboards: Created secure platforms for real-time data analytics using WebSockets and GraphQL for instantaneous updates. ⚙️ Technical Stack: Languages: TypeScript/JavaScript, Python. Backend: Node.js (NestJS, Express), Python (FastAPI · AI microservices). Frontend: React, Next.js, Redux Toolkit, Zustand, Tailwind CSS. Browser Extensions: Plasmo Framework, Chrome API (Manifest V3). Databases: PostgreSQL, Redis, MongoDB, Supabase. APIs: GraphQL (Apollo), REST, WebSockets.