👋 Hi, I'm Viktor Majewski

🚀 Senior Full-Stack Developer | 10+ Years Experience 💻 Building scalable, high-performance web applications used by thousands worldwide

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🧠 About Me

I’m a results-driven Full-Stack Developer with over a decade of experience designing and delivering scalable, production-ready applications. I specialize in modern JavaScript ecosystems, building robust backend services, and crafting high-performance frontend experiences.

I’ve worked on enterprise-scale platforms serving 120K+ monthly users and APIs handling millions of daily requests, focusing on performance, maintainability, and clean architecture.

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⚙️ Tech Stack

🚀 Languages

• JavaScript (ES6+), TypeScript

🎨 Frontend

• React.js, Next.js, Vue.js, HTML5, CSS3, Modern UI Systems

🔧 Backend

• Node.js, Express.js, REST APIs, GraphQL

🏗️ Architecture & Patterns

• Microservices Architecture
• Clean Architecture
• Domain-Driven Design (DDD)
• Event-Driven Systems
• CQRS
• SOLID Principles

🗄️ Databases

• PostgreSQL, MongoDB, MySQL / MariaDB, Redis

☁️ Cloud & DevOps

• AWS, Azure
• Docker, Kubernetes
• CI/CD (GitHub Actions, GitLab CI)

🔐 Security

• JWT Authentication
• OAuth2
• OWASP Best Practices

🧪 Testing

• Jest, Cypress, Integration & API Testing

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💼 Professional Highlights

• 🏗️ Architected scalable full-stack systems supporting 120K+ active users
• ⚡ Improved application performance by 40% through frontend optimization
• 🔄 Built APIs processing 2M+ requests/day with optimized latency
• 🧩 Reduced frontend code duplication by 45% via modular architecture
• 🚀 Automated CI/CD pipelines, reducing deployment time by 75%
• 🔍 Enhanced observability, reducing debugging time by 50%
• 🔐 Implemented secure authentication systems using JWT & OAuth

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📌 What I Focus On

• Building scalable and maintainable full-stack architectures
• Optimizing performance across frontend and backend
• Designing clean, reusable, and testable codebases
• Modernizing legacy systems into modern tech stacks
• Delivering real-world, production-ready applications

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🔍 Projects

• https://department-ms.vercel.app/
• https://wanderlust-1-ieit.onrender.com/
• https://pixora-nry.vercel.app/
• https://rent-a-ride-two.vercel.app/
• https://sensai-bysamee.vercel.app/

📫 Connect With Me

• 📧 viktor19980785@gmail.com
• 💼 LinkedIn: www.linkedin.com/in/viktor-majewski

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⚡ Fun Fact

I enjoy turning complex problems into simple, scalable solutions—and continuously improving systems to perform faster, better, and smarter.

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⭐️ Feel free to explore my repositories and see my work in action!