Global Software Architecture Summit

Registration & Coffee

Opening Ceremony

Modularity: the key characteristic for software excellence by Luca Mezzalira

Software modularity is a powerful design approach that transforms how we build and maintain complex systems. By breaking software into smaller, independent modules, we create more flexible, scalable, and manageable solutions. This concept extends far beyond code, influencing organizational structures, team dynamics, and system architectures. In this keynote, we'll explore how modularity shapes modern software development and its far-reaching implications. We'll discuss how it enables organizations of all sizes to build robust, adaptable systems. From startups to large enterprises, modularity allows teams to work more efficiently and respond quickly to changing needs.

Architecting Scalable and Resilient EV Charging Infrastructure: Lessons from the Field by Avi Levi

This session explores real-world challenges of designing software architectures for large-scale EV charging networks. We'll be discussing OCPP, microservices, event-driven architectures, domain driven architecture and load balancing strategies.

Coffee Break + Breakfast

From here to resilience - a travel guide by Uwe Friedrichsen

Resilience is an important issue in the VUCA world of today. Many companies claim to have a resilient IT, very few have one. What does it mean to be resilient? How do I get there? How can I improve? Which discussions, which tradeoffs, which obstacles are involved? We will look at several gradations of becoming resilient. We will examine their properties and tradeoffs and how to get there. We will discuss what we can achieve at an IT system level, when we need to address the whole socio-technical system and when we need to cross the boundaries of the IT organization. We will also understand the impact of a resilient IT on the long-term viability of a company and the tradeoffs involved. At the end of the session, we will have drawn a map from here to resilience you can use as a travel guide towards your resilient IT.

TBC by Andreas Calvo

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Lunch

The New Realities of SaaS: Why Building is Harder Than Ever by Luis Rubiera

Creating a SaaS product today is more complex than it used to be. From the start, you need to think beyond just building a great service—you have to understand operational constraints, legal requirements, and the geopolitical factors that can shape your market. Compliance, reliability, and cross-border regulations are no longer afterthoughts but key elements of success. This talk explores what it really takes to launch and scale a SaaS in 2025 and why ignoring these factors can be a costly mistake.

TBC

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User Story Writing: Where architecture and business intersect (II)

In this extended workshop, you’ll learn how to recognize business value, craft clear problem statements, and transform them into well-defined user stories. You’ll also learn how to identify and improve weak user stories. Additionally, we will dive into techniques for breaking down large user stories into smaller, incremental ones—ensuring each delivers meaningful business value while maintaining architectural integrity. More importantly, you’ll discover how user story writing can be a collaborative design activity—empowering engineers to explore trade-offs, drive creativity, and contribute meaningfully to both architecture and business success.

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Drinks + Snacks

Auction & Closing

Registration & Coffee

Opening Ceremony

A Defence of Technical Excellence by Chris Simon

The speed / quality trade-off fallacy gets many teams stuck in negative feedback loops - sacrificing quality for speed, both are lost. Teams find their backlogs filled with bugs, their stakeholders frustrated by missed deadlines and the teams themselves unhappy and stressed. Systems thinking, and in particular using causal loop diagrams to identify the feedback loops at play can shed light on how and why the fallacy is so tempting yet so destructive. In this talk I'll demonstrate the building of a range of causal feedback loops to visualise the underlying causes of the problems. With such visualisations we can advocate for the practices of technical excellence that counter the pressures of the fallacy, such as collaborative modelling with domain-driven design, test driven development & living documentation.

The Cost of Good Intentions: Anti-Patterns in Architecture Modernization by Javiera Laso

Modernizing legacy systems seemed exciting...until I found myself absorbed in rewrites, facing business blockers, and watching tech debt pile up instead of shrink. In this talk, I’ll share the biggest traps I’ve seen and experienced firsthand while working on modernization efforts in large organizations—and what helped us avoid (or recover from) them. From picking the wrong architecture patterns too early to losing stakeholder trust halfway through, I’ll walk through real examples of what not to do, along with the principles and strategies that helped us get back on track. Whether you’re breaking down a monolith or updating a business-critical system, I’ll help you steer clear of common pitfalls and make smarter, more sustainable decisions.

Coffee Break + Breakfast

Reversible vs. Irreversible Decisions: The Art of Architectural Flexibility by Avraham Poupko

Can Architecture be too flexible? Is there a price to be paid for extreme decoupling? This is a technical talk for architects and coders. In this talk I explore how can we balance our need for flexibility in the face of the unknown, with the need for reducing complexity. I will provide a few thought frameworks and practical tips and practicies for arriving at a better decision.

Renovate or Rebuild? Architectural techniques for the million euro tradeoff by Eoin Woods

At some point most of us will face the critical decision of whether to modernize a legacy system or rebuild it from scratch. While these decisions can make or break budgets and careers, I have observed that they are often driven by emotion, outdated assumptions and optimism, rather than facts, data and clear rationale. This talk explains how an architecture-driven approach can help us to address the renovate-versus-rebuild dilemma, by moving beyond assumptions to use a decision framework based on proven architectural knowledge.

Lunch

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Slow down to speed up your decision-making by Gien Verschatse

In many software teams, decisions are often driven by habits, blindly following best practices, or the latest trends - rather than a clear understanding of the problem. Microservices are a perfect example. Teams often break systems into smaller services because it feels like the “right” approach and everyone else is doing it too. Before a single service is deployed, the architecture is already overcomplicated, not because of bad intentions, but because we never stopped to ask: what problem are we actually trying to solve?

TBC

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Closing Ceremony

Cocktail