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I'm Georgios Katsantonis, a Senior Full Stack AI Engineer with 8+ years of experience architecting scalable backend systems, REST APIs, and interactive UIs using Python (Django/Flask/FastAPI) and frontend frameworks like React and Angular. I enjoy turning data into practical, secure, and high-performance applications that power informed decisions and rapid iteration. Across startups and global R&D teams, I lead cross-functional squads, design cloud-native microservices on AWS, and build AI-powered platforms for fraud detection, automation, and engineering analytics. I’m passionate about mentoring, improving code quality, and delivering measurable impact in engineering automation and the AEC domain.…I'm Georgios Katsantonis, a Senior Full Stack AI Engineer with 8+ years of experience architecting scalable backend systems, REST APIs, and interactive UIs using Python (Django/Flask/FastAPI) and frontend frameworks like React and Angular. I enjoy turning data into practical, secure, and high-performance applications that power informed decisions and rapid iteration. Across startups and global R&D teams, I lead cross-functional squads, design cloud-native microservices on AWS, and build AI-powered platforms for fraud detection, automation, and engineering analytics. I’m passionate about mentoring, improving code quality, and delivering measurable impact in engineering automation and the AEC domain.

Georgios Katsantonis

Full Stack Developer, AI Engineer, AI Developer, +2

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I'm Georgios Katsantonis, a Senior Full Stack AI Engineer with 8+ years of experience architecting scalable backend systems, REST APIs, and interactive UIs using Python (Django/Flask/FastAPI) and frontend frameworks like React and Angular. I enjoy turning data into practical, secure, and high-performance applications that power informed decisions and rapid iteration. Across startups and global R&D teams, I lead cross-functional squads, design cloud-native microservices on AWS, and build AI-powered platforms for fraud detection, automation, and engineering analytics. I’m passionate about mentoring, improving code quality, and delivering measurable impact in engineering automation and the AEC domain.…I'm Georgios Katsantonis, a Senior Full Stack AI Engineer with 8+ years of experience architecting scalable backend systems, REST APIs, and interactive UIs using Python (Django/Flask/FastAPI) and frontend frameworks like React and Angular. I enjoy turning data into practical, secure, and high-performance applications that power informed decisions and rapid iteration. Across startups and global R&D teams, I lead cross-functional squads, design cloud-native microservices on AWS, and build AI-powered platforms for fraud detection, automation, and engineering analytics. I’m passionate about mentoring, improving code quality, and delivering measurable impact in engineering automation and the AEC domain.

Available to hire

I’m Georgios Katsantonis, a Senior Full Stack AI Engineer with 8+ years of experience architecting scalable backend systems, REST APIs, and interactive UIs using Python (Django/Flask/FastAPI) and frontend frameworks like React and Angular. I enjoy turning data into practical, secure, and high-performance applications that power informed decisions and rapid iteration.

Across startups and global R&D teams, I lead cross-functional squads, design cloud-native microservices on AWS, and build AI-powered platforms for fraud detection, automation, and engineering analytics. I’m passionate about mentoring, improving code quality, and delivering measurable impact in engineering automation and the AEC domain.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Greek, Modern

Fluent

Work Experience

Senior Full Stack Developer at Apreel

October 1, 2025 - October 1, 2025

Led a cross-functional engineering team to deliver enterprise-grade AI automation platforms, optimizing resources and increasing release velocity.

Full Stack / AI Engineer at TechFirst

June 1, 2024 - June 1, 2024

Built and maintained full-stack web application features, engineered a fraud detection platform, and integrated modular AI microservices.

Full Stack Developer at Aventurine SA

August 1, 2021 - August 1, 2021

Developed an internal e-commerce platform, optimized performance and implemented an automated customer support system.

Software Developer at Exandia Inc

August 1, 2020 - August 1, 2020

Developed a scalable event and media management platform, optimizing indexing and query pipelines for improved performance.

Senior Full Stack Developer at Apreel

July 1, 2024 - October 1, 2025

Led a 6-member cross-functional team delivering modular Django backend and React frontend features; modeled and automated key business processes with BPMN to reduce manual intervention by 25%. Architected cloud-native microservices on AWS with Docker and PostgreSQL, achieving 99.9% uptime and a 30% cost reduction. Implemented end-to-end CI/CD pipelines with GitHub Actions and Terraform, improving release velocity by 40% and ensuring environment parity. Mentored developers and established design/code-review standards to improve code quality and delivery predictability.

Full Stack AI Engineer at TechFirst

September 1, 2021 - June 1, 2024

Built and maintained full-stack features using React.js and FastAPI/Django; achieved seamless data synchronization and 30% faster load times. Connected AutoCAD/Revit plugins to cloud services via REST endpoints and built Angular dashboards with Chart.js and D3.js for real-time engineering data visualization backed by PostgreSQL and Redis. Engineered a fraud-detection platform with ETL pipelines (Airflow, PostgreSQL, Redis) and TensorFlow-based anomaly detection, reducing manual reviews by 45%. Integrated AI models into a Django + React platform for real-time fraud analysis, retraining, and decision-support workflows, improving model accuracy and responsiveness by 30%.

Full Stack Developer at Active.Ai

September 1, 2020 - August 1, 2021

Led development of an internal e-commerce and operations platform using Python and Angular; streamlined order management, inventory tracking, and reporting. Optimized backend queries and frontend performance, reducing order processing errors by 25% and page load times by 40%. Built a fully automated voice call center using Twilio Voice API and Python, handling 90% of inbound inquiries, reducing costs by 60% and eliminating customer wait times.

Software Developer at U-Reg

May 1, 2018 - August 1, 2020

Optimized Apache Lucene indexing and query pipelines to improve search relevance by 30% and reduce average latency by 25%. Developed secure RESTful APIs for Oracle DB integration with JWT/OAuth2-based authorization and RBAC. Built a full-stack monitoring and analytics dashboard using ReactJS and Flask to provide real-time visibility into traffic metrics, transaction trends, and system health KPIs.