Senior Backend Developer • Security Enthusiast • IoT Hobbyist

Welcome to my GitHub!
I'm a Senior Backend Developer from Lithuania with a strong focus on building secure, scalable and maintainable backend systems. I specialize in TypeScript, Node.js, NestJS, and modern API architecture.

I enjoy solving complex problems, improving system reliability, and designing clean backend modules with strong boundaries and clear contracts. Recently, I’ve been expanding into application security and electronics/IoT, combining software with real‑world hardware.

• Backend Architecture (TypeScript, Node.js, NestJS)
  Modular design, clean boundaries, secure APIs, integration with external services.
• Security & Observability
  OWASP practices, encryption, authentication flows, logging, monitoring.
• Database Design & Performance
  MongoDB, PostgreSQL, indexing, query optimization.
• IoT & Electronics (new path)
  Arduino, sensors, prototyping, secure device-to-cloud communication.

• Migraine Tracker App
  Full-stack project with secure NestJS monolith + React dashboard.
  OAuth login, encrypted data, weather/solar integrations, multi-module backend.

• IoT Temperature Sensor Prototype
  Arduino Uno + sensor → secure API ingestion → dashboard visualization.

• Application Security (OWASP, threat modeling, audits)
• Electronics & IoT (Arduino, ESP32, sensors)
• Python for data processing and automation

• TypeScript/NestJS backend projects
• Security-focused applications
• IoT prototypes and device-to-cloud integrations

JavaScript, TypeScript, Node.js, NestJS, backend architecture, API design, databases, security basics, IoT prototyping.

• Email: float45@gmail.com
• LinkedIn: https://www.linkedin.com/in/wirtaw/
• Blog: https://wirtaw.github.io/blog

• I enjoy weightlifting and crossfit
• I love combining software with real-world hardware
• Always exploring new ways to grow as an engineer