Performance Engineering Meetup #5

🚀 Event Overview

Performance dashboards may look perfect — while real users in distant regions report frustration and slow experiences. Why does this happen? What are we missing when testing isolated components instead of real-life journeys across carriers, ISPs, and networks?

During this meetup, we will explore practical approaches to performance in distributed systems, focusing on:

• 🔍 Shifting from component testing to journey-level validation
• 🏗️ Architectural decisions that improve real user experience
• 🤖 Leveraging AI in performance engineering
• ⚠️ Identifying hidden system risks
• ⚡ Accelerating scaling with modern JVM capabilities

After the main talk, we’ll continue with lightning talks and finish with networking & pizza 🍕.

📅 Event Agenda

17:30 – 18:00 ☕ Registration & Networking (welcome coffee)

18:00 – 18:05 🎤 Welcome & Event Kickoff

18:05 – 18:45 👨‍🏫 Main Presentation: Robert Boguszewski & Filip Cynarski (IG) — The Async Challenge: When Green Dashboards Hide Angry Users

Performance dashboards showed excellent metrics while user satisfaction plummeted in distant markets. We were testing technical components from headquarters while users experienced complete journeys through different carriers and ISPs. This talk covers the shift from component testing to journey testing, the architectural decisions that delivered measurable improvements.

18:45 – 19:00 ❓ Q&A with IG speakers

19:00 – 19:20 🤝 Networking Break

19:20 – 19:35 ⚡ Lightning Talk #1: Artur Dudek (Sii) — AI in Performance Engineering

• Q&A included (15 min total)

19:35 – 19:50 ⚡ Lightning Talk #2: Przemek Lalak (Allegro) — STPA to Discover the Unknown Unknowns

• Q&A included (15 min total)

19:50 – 20:05 ⚡ Lightning Talk #3: Piotr Mróz (commercetools) — JVM CRaC: Accelerating Kubernetes Scaling with Rapid Pod Readiness

• Q&A included (15 min total)

20:05 – 21:00 🍕 Networking & Pizza

🎙️ Meet the Speakers

• Filip Cynarski (IG Group) Test Architect enabling teams to deliver robust and reliable cloud services through comprehensive testing strategies. He spearheads test architecture initiatives within the Quality Engineering and Metrics team, specializing in performance engineering and observability solutions using Grafana K6 and synthetics monitoring to ensure optimal system performance and reliability. His expertise extends to implementing real-user monitoring and comprehensive metrics collection strategies that provide critical insights into system behavior. Currently, he is expanding his technical capabilities in frontend development with React and Angular, bridging the gap between testing and UI implementation.

• Przemysław Lalak (Allegro) Leads a team inside Allegro's technical platform, focused on ensuring the marketplace can handle anything thrown its way. His team drives performance and chaos testing at scale and steers the ship during incidents. Off the clock, he’s a passionate cyclist and traveller — ask him why Patagonia is the best place on earth.

• Artur Dudek (Sii) Senior Architect responsible for implementations, performance monitoring, and reporting. An innovator who finds optimization opportunities even in well-organized processes and tools. Passionate about cycling, he loves every type of bike — ROAD, Gravel, MTB, XC, DH, Enduro, and trekking.

• Piotr Mróz (commercetools) Principal Engineer helping teams build fast, scalable, and reliable cloud services. He leads performance initiatives across commercetools, focusing on automating load and resilience testing, optimizing JVM performance, improving Kubernetes scalability, and promoting data-driven engineering. Outside of work, he trains in amateur kickboxing and enjoys bouldering.

Photos may be taken during the event and published on the social networks and websites of SII, Sabre, Pega, IG Group, and Allegro for promotional and marketing purposes. Your participation will be understood as consent to the dissemination of your image.

The email address you provide during registration will be stored and used to communicate with you about future events and related initiatives.