Open to Opportunities

Architecting
The Future

Hi, I'm Thomas Kantartzis. A CTO & Full-Stack Engineer who turns complex legacy systems into sleek, scalable cloud architectures.

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About Me

I don't just write code; I build businesses. My career has been defined by a dual focus: high-level strategy and deep-dive engineering.

Whether it's migrating a 20-year-old database without downtime or negotiating client contracts, I bring a "can-do" attitude to every problem. I believe technology should serve the business, not the other way around.

Languages

Greek (Native), English (C2 Fluent)

Education

Economics Background

Experience

The journey so far.

2024 - 2025

CTO & Lead Full Stack Engineer

@ Kiakos Packaging

Orchestrating a complete digital transformation for a legacy manufacturing firm.

  • Unified ERP, E-commerce, and internal tools into a single reactive ecosystem.
  • Zero-downtime migration of 20+ years of legacy data to modern cloud infrastructure.
  • Implemented rigorous CI/CD pipelines, reducing deployment times by 80%.
2020 - 2025

Full Stack Engineer & MD

@ Aptranet

Driving technical strategy and business growth for a high-performance SaaS.

  • Bridged the gap between technical execution and business strategy/finance.
  • Architected high-availability systems handling massive concurrent connections.
  • Optimized web performance and security protocols, cutting costs significantly.

Technical Arsenal

Tools I use to build the future.

Languages

Golang NodeJS React TypeScript BASH

Cloud Infra

AWS Google Cloud Kubernetes Docker Serverless

Data

MySQL Redis MongoDB Firestore GraphQL

SecOps

OWASP Firewalls VPCs TCP/UDP

DevOps Master

Prometheus, Grafana, Nginx

Network Expert

CDNs, WebSockets, DNS

Ready to Scale?

I'm currently available for select projects and leadership roles. If you have a complex system that needs a steady hand, let's talk.