Welcome to React Summit 2026. Discussing architecting reliable React systems in unreliable environments. Real-world challenges with async complexity, state management, and app flow impact. Addressing issues with unreliable connections, API failures, and lack of UI-system sync. Managing OTA updates, Boolean soup problem, and useEffect dependency chaos in state management. Dealing with UI state discrepancies, hidden updates, and inconsistencies. Ensuring deterministic system architecture for accurate UI feedback and optimizing state management with clear boundaries and a state machine.

We thought AI would help us write code faster. Instead, it's changing what coding actually is.
We started with prompts, then copilots, then agents. Each step felt like a leap forward — until you try to build something real at scale.Because prompts don’t remember.
Agents don’t coo...

Sharing lessons on building and scaling global React applications. Front-end complexity with business expansion. Challenges of globalization in React development. Impact of market variability on front-end architecture for global scale. Architectural decisions influenced by operational realities. Technical and organizational problems at a global scale. React dual architectures for global scale. Balancing consistency and flexibility in architecture. Issues with business logic in components, scalability, region-specific deployments, and optimizing performance. Organizational challenges with global feature shipping, release conflicts, slow rollout cycles, and configuration duplication. Issues at global scale: technical and organizational challenges. Avoid business logic in components, scalability issues like user spikes, and deployment time. Market logic in components, region-specific deployments, front-end boundary size increase, and fragmented integrations. Multiple teams shipping globally face challenges like release conflicts, slow rollout cycles, and market-driven behavior testing. Complexity increases with more markets, localization goes beyond translation affecting currency, taxes, compliance, and more. Markets vary operationally requiring adaptive platforms for dynamic changes based on market context. Shift to adaptive platform for dynamic market behavior. Configuration as front-end control plane, like Kubernetes. Feature flags crucial for efficient management, operational flexibility. Market-specific capabilities, safe experiments, unstable features disabling. Region-aware routing enhances operational concerns separation, micro front-end usage for improved performance. Optimizing CDN and SEO for market consistency. Region-aware routing for operational separation, micro front-end performance improvement. Front-end observability critical for global scalability. Evaluation for adaptability, avoiding over-engineering. Challenges in global React application evolution, operational maintainability. Considerations for localization, multi-tenant systems, feature-flag scaling, and global architecture challenges.

The Talk discusses the significance of communication, problem-solving, and ownership for senior engineers in software development. It emphasizes the importance of ego management, learning from mistakes, and embracing simplicity for growth and improvement. The key points focus on balancing ownership, avoiding overcomplication, and prioritizing fundamentals and craftsmanship over trendy tools in programming.

What makes an agent skill reliable, performant, and maintainable? We will explore a robust approach to skill design, starting with foundational best practices, moving into automated skill generation, and validation. The second half of the talk focuses on the critical role of evaluation, demonstra...

Dan Shapir introduces heap dumps to identify and fix Node.js memory and CPU issues. Memory leaks in JavaScript occur when objects are still reachable, impacting memory usage. Continuous memory rise from leaks can deplete memory and lead to CPU usage escalation. Detecting and resolving memory leaks promptly is crucial to prevent system unresponsiveness in production environments. Heap dumps and memory dumps help analyze memory issues, with Chrome DevTools aiding in finding memory leaks. Pinpointing memory leaks involves comparing heap snapshots and analyzing leaked objects. Alternative methods for generating heap snapshots include new experimental node flags, automatic triggers, and built-in APIs, offering benefits but posing risks such as potential crashes and security vulnerabilities.

This talk dives into how developers can build structured, repeatable coding workflows using Claude Code's ecosystem: Skills, Subagents, settings, Hooks, and MCP servers. I'll walk through the architecture behind Claude Code Templates, an open-source project with 120K+ npm downloads and 23K+ GitHu...

Tathagath discusses the misconception of React's role in app slowness and emphasizes architecture over React performance. Context impact on app rendering is explored, along with React compiler enhancements. Global state misuse and state management in React are addressed. Performance pitfalls, optimizing app performance, and the impact of third-party scripts on React are discussed. Strategic management of third-party scripts and common mistakes in SSR applications are highlighted. Recognizing hydration costs and architectural impacts in React, as well as shifting mindset for performance optimization, are key points.

AI coding tools are good at writing local diffs, but they still miss repo-wide truth. In large TypeScript and JavaScript codebases, that means dead exports, duplicated logic, accidental boundary violations, and complexity creep after every “small” AI refactor. In this talk, I’ll show a prac...