Menelaos Zetas is a Lead Front-End Engineer with over 9 years of experience building and evolving large-scale, mission-critical web applications, primarily in the banking and financial services sector. He specializes in Angular (v2–21), TypeScript, and RxJS, with a strong focus on scalable frontend architectures, performance optimization, and maintainable design systems.
At Alpha Bank, he serves as the technical owner of the frontend layer of the Core Banking System, where he has led multiple large-scale migrations to modern Angular versions and introduced Nx monorepo architecture to support modularity, reusability, and team scalability. His work includes designing shared frontend platforms, enforcing architectural standards, and ensuring seamless integration across numerous enterprise applications. He also leads a frontend engineering team, mentoring developers and acting as a key reference point for architecture and best practices across cross-functional teams.
Beyond production systems, Menelaos has contributed to high-impact initiatives such as digital signatures, customer notification systems, onboarding platforms, and low-code workflow solutions, all operating at enterprise scale under strict regulatory and performance requirements.
In parallel, he is a PhD candidate at the National and Kapodistrian University of Athens, focusing on technology-driven optimization in maritime logistics and port systems. His research intersects distributed intelligence, data-driven systems, and real-world optimization problems, and includes contributions to European research projects and peer-reviewed publications in areas such as federated learning and next-generation (6G) communication systems.
Menelaos combines hands-on engineering leadership with academic research, bringing a systems-thinking mindset to frontend development—bridging the gap between theory and large-scale industrial applications.
This session presents the real-world evolution of a large-scale Core Banking System (CBS) over nearly a decade — from fragmented fat clients to a modern, cloud-oriented and modular frontend ecosystem.
We begin with a complex landscape of isolated applications and heterogeneous technologies, leading to high operational cost, limited scalability, and slow delivery. The first transformation phase focused on unification, introducing a single web platform and a standardized Angular-based frontend, significantly improving maintainability, observability, and delivery speed.
As the system scaled, new challenges around performance and resilience led to containerization. We will explore the “lift & shift” approach applied to a large monolith, the move to private cloud, and key lessons in deployment, resource optimization, and operational stability.
The journey continues toward cloud-native architecture, where adopting modern technologies reduced memory usage by up to 78% and startup time by 85%, enabling more efficient and scalable systems.
On the frontend, we examine the evolution from an Angular monolith to a modular architecture using Nx monorepos and microfrontend-inspired patterns, enabling team scalability and independent development without excessive complexity.
The session focuses on real-world trade-offs, architectural decisions, and lessons learned in highly demanding enterprise environments.
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