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

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.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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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.

Education

BSc in Computer Science at Aristotle University of Thessaloniki
January 1, 2014 - January 1, 2018
BSc in Computer Science at National University of Singapore (NUS)
January 1, 2014 - January 1, 2018

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Media & Entertainment, Professional Services