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Topics

Featured in Development

Go Channels: Understanding Happens-Before for Safe Concurrency

This article dives into the happens-before semantics of Go channels, explaining how they relate to memory visibility, synchronization, and concurrency correctness. We'll examine subtle pitfalls, illustrate them with examples, and explore the architectural implications for system designers.

Go Channels: Understanding Happens-Before for Safe Concurrency

All in development

Architecture & Design

Featured in Architecture & Design

If Architectures Could Talk, They’d Quote Your Boss

Software architecture reflects how organizations communicate and make decisions. Failures stem from misaligned incentives, unclear ownership, and structural gaps—not technical flaws. Architects must design not just systems, but the conditions for systems to thrive, using platform thinking to reduce friction and foster autonomy.

If Architectures Could Talk, They’d Quote Your Boss

All in architecture-design

AI Infrastructure

Featured in AI, ML & Data Engineering

Deploy MultiModal RAG Systems with vLLM

Stephen Batifol discusses building and optimizing self-hosted, multimodal RAG systems. He breaks down vector search, nearest neighbor indexes (FLAT, IVF, HNSW), and the critical role of choosing the right embedding model. He then explains vLLM inference optimization (paged attention, quantization) and uses Mistral's Pixtral to detail multimodal large language model architecture.

Deploy MultiModal RAG Systems with vLLM

All in ai-ml-data-eng

Culture & Methods

Featured in Culture & Methods

Systems Thinking for Scaling Responsible Multi-Agent Architectures

Nimisha Asthagiri explains the critical need for responsible AI in complex multi-agent systems. She shares practical techniques for engineering leaders and architects, applying systems thinking and Causal Flow Diagrams. She shows how these methods help predict and mitigate the unintended consequences and structural risks inherent in autonomous, learning agents, using a scheduler agent example.

Systems Thinking for Scaling Responsible Multi-Agent Architectures

All in culture-methods

Featured in DevOps

From Grassroots to Enterprise: Vanguard's Journey in SRE Transformation

Christina Yakomin shares Vanguard's SRE transformation: from quarterly testing of monoliths to a mature DevOps model with continuous delivery. She explains the SRE coaching hub, self-service tools, and advanced techniques like request-rate autoscaling. She details modern challenges, including region failure game days and testing AI-backed contact centers.

From Grassroots to Enterprise: Vanguard's Journey in SRE Transformation

Events

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QCon San Francisco 2025

Get proven patterns to de-risk modern architectures. See how engineers scale cloud-native systems, improve observability, and evolve reliable platforms at pace.

Early Bird ends Oct 14.

QCon AI New York 2025

Move beyond AI demos to real engineering impact. Discover how teams embed LLMs, govern models, and scale inference pipelines to accelerate development securely.

Early Bird ends Oct 14.

QCon London 2025

Benchmark your systems against leading engineering teams. See what really works in FinOps, modern Java, and distributed data architectures to balance cost, scale, and reliability.

Early Bird ends Oct 14.

InfoQ Homepage Presentations Real-Time & Personalized Notifications @Twitter

Architecture & Design

Real-Time & Personalized Notifications @Twitter

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50:56

Summary

Gary Lam and Saurabh Pathak talk about the hybrid push/pull-based architecture adopted by Twitter Notification platform and how they perform aggregation & filtering, fanout for very large graphs, empower relevance, and enable experimentation.

Bio

Gary Lam is the technical lead of the Notifications timeline team at Twitter. He and his team are responsible for Twitter's notifications platform and notifications timeline. Saurabh Pathak is an Engineering Manager at Twitter where he leads the Notifications timeline team which is a product & platform team rolled into one.

About the conference

Software is changing the world. QCon empowers software development by facilitating the spread of knowledge and innovation in the developer community. A practitioner-driven conference, QCon is designed for technical team leads, architects, engineering directors, and project managers who influence innovation in their teams.

Recorded at:

Jun 06, 2017

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