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# From Scheduler to Events: Rethinking Alerts in a Modular System


- **Date:** Thursday, Jul 9, 2026
- **Time:** 17:30–18:00 (30 min)
- **Room:** Stage 2
- **Event:** World Congress 2026 Europe

## Recording

[Watch recording](https://www.wearedevelopers.com/videos/100173-from-scheduler-to-events-rethinking-alerts-in-a-modular-system)

## Description

Many enterprise systems rely on a central scheduler to run alerts and notifications - until that scheduler becomes a bottleneck for change, reliability, and scalability.
In this talk, I’ll share our ongoing journey of replacing a traditional scheduler-based approach with event-driven processing in a large, modular system. Instead of rewriting everything or introducing heavy infrastructure, we focused on changing the architecture step by step: decoupling alert logic, isolating failures per module, and moving from time-based execution to meaningful triggers.

I’ll walk through the design decisions we made, the trade-offs we faced, and the mistakes we learned from while transforming how alerts are generated and processed. This session is not about a perfect end state, but about the real work of evolving a legacy system under real constraints and how small architectural shifts can lead to big improvements in resilience, clarity, and team ownership.

## Speaker

### [Cristina Musceleanu](https://www.wearedevelopers.com/@cristina-musceleanu)

IT Application Development Expert at European Central Bank


## Related talks at this congress

- [Never say refactoring is impossible](https://www.wearedevelopers.com/events/world-congress-2026-europe/sessions/1355-never-say) — Andreas Kleinbichler
- [Beyond Resilience: Architecting Antifragile Systems](https://www.wearedevelopers.com/events/world-congress-2026-europe/sessions/1026-beyond-resilience) — Jan de Vries
- [Event-Driven Microservices: Patterns and Practices for Production-Ready Systems](https://www.wearedevelopers.com/events/world-congress-2026-europe/sessions/937-event-driven) — Lutz Huehnken
- [Confessions of a Software Archaeologist: What I Did Wrong in 10 Years of Restructuring Software](https://www.wearedevelopers.com/events/world-congress-2026-europe/sessions/1270-confessions-of-a) — Hendrik Lösch