“Microfrontends” for Mobile in React Native

React Advanced

React Advanced 2023

Mo Khazali

TechLead Conference

TechLead Conference 2023

Why Leetcode is Dead and Pair Programming for Interviews is the Way Forward

The Art of ‘Humble Views’: Testing React Native Apps the Smart Way

TestJS Summit

TestJS Summit 2023

Managers Are From Mars, Devs Are From Venus

TechLead Conference 2024

JS on the Big Screen: Making TV Apps

JS Nation

JSNation 2024

Server-Driven Mobile Apps With React Native

React Summit

React Summit 2024

C3 Dev Festival

C3 Dev Festival 2024

Understanding the New Event Loop in React Native

React Advanced 2024

The Age of Universal React: What’s the Catch?

React Day Berlin

React Day Berlin 2024

Agentic AIrways: Orchestrating a Dev Team with Multi-Agent Systems

TechLead Conf Amsterdam 2026: Adopting AI in Orgs Edition

A Developer’s Guide to Communicating, Convincing, and Collaborating Effectively With Stakeholders It’s a tale as old as time - collaboration between developers and business stakeholders has long been a challenge, with a lack of clear communication often leaving both sides frustrated. The best developers can deeply understand their business counterparts’ needs, effectively communicate technical strategy without losing the non-technical crowd, and convince the business to make the right decisions. Working at a consultancy, I’ve both failed and succeeded in architecting and “selling” technical visions, learning many lessons along the way.Whether you work at a product company, are a consultant/freelancer, or want to venture beyond just being a developer, the ability to convince and clearly communicate with stakeholders can set you apart in the tech industry. This becomes even more important with the rise of GenAI and the increasingly competitive developer market, as problem-solving and effective communication are key to positioning yourself.In this workshop, I’ll share real-world examples, both good and bad, and guide you through putting the theory into practice through dojos.

Testing Tools & Frameworks

!!! IMPORTANT - the number of seats are limited, so make sure to register for the workshop before June 11. In this hands-on workshop, attendees split into teams - Project Management, Development, QA, and Marketing - to build an AI-enabled development for a fictional airline, AgenticAIrways. Each team builds an AI agent for its role in the delivery workflow. The PM team defines requirements and passes them to the Dev team, who build features with tool use and domain-specific logic. The Dev team hands off to PM and QA for review and stress-testing with adversarial scenarios and edge cases. Once the system passes muster, it's handed to Marketing to define how the product is communicated to end users. Agents communicate and coordinate using MCP and Agent-to-Agent (A2A) protocols, mirroring how agentic software will increasingly be embedded in real development workflows. Whether the airline launches successfully or descends into chaos, every team will walk away with practical experience designing, constraining, and orchestrating multi-agent systems — and a clear understanding of how AI agents can augment each role on a dev team.

Engineering Leadership

Web and Mobile are getting closer and closer in the React ecosystem. With the launch of Expo Router and React Strict DOM in the last year, the message is clear: Web and mobile can no longer be separated. The React Core Team and community have been working silently in the background on this project, and there have been RFCs to bring Web APIs to Native, and make the RN event loop closer to the web.This is great for developers - suddenly React devs can “learn once, write once, and run anywhere”, and can target web, iOS, and Android (and even more) from a single codebase. You might be thinking: is this just a pipe dream, and will the reality live up to the expectation of “writing once” for every platform? In this talk, we’ll share our real-world experiences of building universal React apps from a single codebase. We’ll look at the libraries and tools, cover some of the real-world challenges, and share with you a &lt;List /&gt; of what you can and can’t share across different platforms.

If you’re a seasoned React Native developer, you may have been burned by the fact that certain React behaviours just don’t work as you’d expect. We’ve all tried to use useLayoutEffect on our RN projects, only to find that it doesn’t quite behave how the React docs describe it. All of that will change with the new event loop coming to React Native as part of the effort to bring React Native closer to Web APIs.  Strap in for a wild ride where we dig into the depths of how the event loop currently works, how it will change, and what this means practically for us as React and React Native developers.

How do you create a scalable application with lots of different layouts, screens, giving enough flexibility to each team to customise without adding orders of magnitude in complexity to your app? Companies like Airbnb, Meta, and Lyft approach this with server-driven UI. We’ll explore how this can work for mobile apps, challenges that it introduces, and how it’s the way forward in the age of React Server Components.

The ever-expanding landscape of JavaScript applications has now reached the big screen - yes, you heard it right, you can build TV apps with JavaScript!  The TV operating space is a mess; there’s more fragmentation than the Android ecosystem, and that’s saying something. Each manufacturer has tried to reinvent the wheel by making their own OS. At the moment, the main players are Android TV, tvOS, WebOS, Tizen, among a whole myriad of others.  This makes it a unique place where Javascript and web technologies can become a uniting factor and save you from the stress of trying to develop and maintain handfuls of apps for the big screen.  We’ll talk about how to build TV apps, what JS frameworks can help in this, and explore the challenges that come hand-in-hand with TV app development, namely performance bottlenecks and focus management using remote controls.

In this talk, we explore the divisive world of testing, where developers often find themselves torn between writing no tests and striving for 100% test coverage. Learn how to navigate these polarizing positions and adopt a more nuanced strategy that makes testing efficient and effective.We'll dive into the concept of 'Humble Views,' where we minimize untestable objects by extracting logic from UI elements into test-friendly parts of the codebase. This approach simplifies testing, focusing on business logic instead of UI complexities. Discover how the Model-View-Presenter (MVP) architecture helps achieve this, with presenters serving as a logical layer for testing and hooks aiding in separating logic from UI components.Throughout the talk, we'll discuss the trade-offs of this approach, the role of End-to-End (E2E) tests, and how to strike the perfect balance between too much and too little testing. Join us as we delve into the art of creating 'Humble Views,' ensuring that our React Native apps are scalable, maintainable, and effectively tested!

Scaling has always been an issue in software development. Architects have been grappling to solve this problem on many layers. In the early 2000s, a concept of “micro-services” started popping up - a system could be split up by business domain into a number of smaller loosely-coupled services.  More recently, this concept has started being adopted by the frontend community. An app could be split into multiple sub-apps, each with their own teams, technologies, and codebases. Companies like Spotify, Amazon, and Microsoft have adopted this approach and it has helped them scale even faster. In the world of mobile development, the question arises: “Can we create Microfrontends for mobile apps?”.

We’ve all experienced the job application which required us to do an online coding test. You have to brush up on your algorithms, data structures, time complexity, and by the end of it you’re cramming as if it was a university exam! Now that we’re the ones usually interviewing candidates, a good question to ask is: “are online coding tests the best indicator of a candidate’s proficiency and competence?” In this talk, we’ll explore:<ul><li>- The pitfalls of Leetcode-like tests</li><li>- What we should be looking for in candidates</li><li>- How pair programming is the best way to see how a candidate would work with the team</li><li>- Plus a little mini demo on a remote pair programming interview</li></ul>