Senior Software Engineer & Team Lead
Marios Mantratzis
Building backend-heavy, cloud-native software systems. Specializing in distributed architectures, secure API platforms, and high-availability microservices at scale.
About.
Senior Software Engineer and Team Lead with 8+ years of experience building backend-heavy, cloud-native software systems across enterprise and multi-service environments.
Core expertise in Java, Spring Boot, distributed systems, event-driven architectures, secure API platforms, and microservices, with strong hands-on experience in Azure, Kubernetes, Docker, and full-stack delivery with Angular and React when end-to-end ownership is needed.
Proven track record in leading engineering efforts across backend, cloud, and full-stack initiatives—contributing to system design, API security, DevOps practices, performance optimization, mentoring, and code reviews. Delivered and supported large-scale systems involving 10+ production projects.
Core Expertise.
Technology experience matrix spanning backend, cloud infrastructure, distributed systems, and full-stack delivery.
Backend Engineering
Distributed Systems
Cloud & Infrastructure
Databases
Security & Identity
Frontend
Selected Impact.
Experience.
Senior Software Engineer & Team Lead
European Dynamics
- Lead backend and cloud engineering across large-scale enterprise systems in multi-service, cloud-native environments
- Design and deliver Azure-based cloud-native solutions using App Services, Functions, Cosmos DB, Event Hubs, Service Bus, APIM, and Bicep
- Design and implement event-driven workflows across distributed services and asynchronous architectures
- Drive architecture, API security, performance optimization, DevOps practices, mentoring, and code reviews
- Contribute to security and compliance activities including InfoSec controls, risk assessments, and architecture reviews
Senior Software Engineer
European Dynamics
- Contributed to migration of legacy monolithic systems to Spring Boot microservices
- Led frontend modernization from AngularJS to Angular
- Introduced centralized logging and monitoring using the ELK stack
- Delivered backend and frontend improvements across enterprise software projects
Software Engineer
European Dynamics
- Developed backend and frontend features across enterprise software projects
- Resolved a major Angular performance bottleneck affecting production users
- Supported production deployments, CI/CD processes, and issue resolution
Military Service — Special Forces
Hellenic Army · Amphibious Commando
- Completed mandatory service in the Hellenic Army Special Forces
- Developed discipline, resilience, teamwork, and the ability to perform under pressure
Certifications.
Azure Data Fundamentals
Microsoft · 2026
Azure Administrator Associate
Microsoft · 2025
Azure Developer Associate
Microsoft · 2025
Azure Fundamentals
Microsoft · 2024
Professional Development
SOLID Principles: Introducing Software Architecture & Design
Udemy · 2023
Cloud Developer Nanodegree
Udacity · 2023
Education
National and Kapodistrian University of Athens
Bachelor's Degree, Informatics and Telecommunications · 2016
Current Interests.
Beyond day-to-day engineering, areas of active exploration and development.
Applied AI & Computer Vision
Experimentation in image recognition, object detection, and image segmentation using Python and TensorFlow.
Android Product Development
Building mobile applications with a focus on real-world utility and modern Android development practices.
Data Platform Exploration
Exploring lakehouse architectures, media-data platforms, and modern data engineering workflows.