Seyfi K.

Senior Fullstack Engineer with strong experience in building scalable backend systems and real-time applications.

I specialize in Node.js, TypeScript, and React, with a focus on system architecture, performance optimization, and clean, maintainable code. I have led multiple engineering teams and delivered large-scale solutions across IoT, AI, and data-driven platforms, including EU-funded projects.

My experience includes designing and developing end-to-end systems, from architecture to deployment. I have built real-time platforms using WebSockets and MQTT, developed microservices-based infrastructures, and integrated IoT devices with scalable backend systems.

I can help you with:

• Backend & API development (Node.js, TypeScript)

• Fullstack applications (React, MERN stack)

• System architecture & scalability

• Real-time systems (WebSockets, MQTT)

• IoT integrations and data pipelines

• Performance optimization and refactoring

I am used to working independently, taking full ownership of projects, and communicating directly with stakeholders.

Available for both short-term and long-term projects.

Let’s build something solid.