Anyone can spin up an AI agent in five lines. Would you give that agent a refund button? In this demo-driven talk I build a customer support bot with LangGraph, the framework behind agents at Klarna, Uber, and J.P. Morgan, to show why control matters in production. Instead of letting the model im...

Coding agents are quickly becoming part of day-to-day engineering work, but most people still lack visibility into what these agents are actually doing. Marius will share findings from Apollo’s research into tens of thousands of real-world coding agent traces: from direct security risks like dang...

Starting with recent comments criticizing the stance on AI and coding, highlighting the divide between senior and junior developers' perspectives. Reflecting on the impact of AI on teaching code and content creation, transitioning to AI-driven teaching methods. Challenges in transitioning to AI-driven teaching focused on critical thinking over syntax. Discussion on scaling AI tools, Bloom's Taxonomy, and the shift to creation-focused development. Importance of critical thinking in software engineering and nurturing junior talents in the evolving industry. AI's role as a teaching tool, concerns about job replacement, and the need for continuous skill growth. The significance of maintaining critique ability in AI output evaluation.

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.

Jamin discusses the shift from using form libraries to native web APIs in React development, emphasizing the benefits of exploring web-native APIs before relying on libraries. The talk covers topics such as Constraint Validation API, React 19 form actions, and CSS pseudo-classes for form building without libraries. It highlights real-time validation, simplified form submission, and custom error handling in React forms. The importance of customizing error messages, setting up custom error handling, and optimizing form performance are also addressed, along with challenges and recommendations for utilizing web native APIs in form development.

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.

Eric Rasmussen discusses a new framework addressing current framework issues, focusing on React developers and the evolution of UI concepts. React's reactivity concept prioritizes safety and re-evaluation strategies. Fine-grained reactivity in React tracks dependencies for precise updates. Signals in Solid enable code reruns based on changes. Ripple introduces fine-grained reactivity, readable code, and supports a smooth syntax transition from React. Ripple's state management simplifies updates and effects handling. Ripple's design philosophy offers an alternative approach to React's limitations, emphasizing fine-grained value changes. Ripple stands out for SSR challenges, superior reactivity, and imperative syntax.

Marc Erickson discusses React rendering fundamentals, optimizing performance, and compiler efficiency. The React compiler optimizes components with memoization and efficiently recalculates changes. React 19 introduces memo cache hook for performance optimization. Enhancements in logic execution, reference optimization, and context changes improve rendering performance. The React compiler impacts re-renders based on props, inputs, and tool transitions. Developing a time-traveling debugger at Replay addresses bug investigation challenges. Understanding code optimization and React build tool transitions are crucial for performance investigation in software engineering.