Saman Abaasi
Staff Frontend Engineer & Camunda Platform Architect | Author of the “How React Works” deep‑dive series
Sam Abaasi is a Staff Frontend Engineer and squad lead at MTN Irancell , where he architected and delivered a Camunda‑based workflow platform to replace a long‑running legacy production system (Huawei Ows). In that role he owns the full frontend platform – React, TypeScript, BPMN/DMN tooling, form‑js customization, and internal developer experience.
He is also the author of three in‑depth technical series: “How JavaScript Works” (10 parts), “How React Works” (9 parts, from Fiber to Suspense and time‑slicing), and the definitive 23‑part guide to the bpmn‑io form‑js module system and dependency injection. His writing focuses on making complex internals practical for teams building UI platforms in centralized, virtual, and thin‑client environments.
The Scale Wall: What Breaks When React Native Grows Fast
Every React Native app is simple at first. Then users multiply, teams multiply, and yesterday's architecture and performance start to crack.
This roundtable brings together engineers who have pushed React Native to serious production scale across very different environments and very different pressures, to compare what actually held up and what quietly became a liability. Bring your own scaling story, because the sharpest lessons in this room will come from the group, not just the speakers.
Discuss challenges you have been facing at scale and what could be their best solutions.
What Building a Custom React Renderer Taught Me About React Native Performance
To better understand React's rendering model, I built an alternative renderer powered by signals instead of React's traditional update pipeline. The project resulted in four open-source npm packages and completely changed how I think about application performance.
In this talk, I'll use lessons from building a renderer to explain React Native performance from the inside out. We'll explore how React schedules updates, why components re-render, where rendering costs originate, and how fine-grained reactivity changes the picture. Most importantly, we'll connect these concepts directly to React Native applications and show how a deeper understanding of React internals leads to better performance decisions.