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Overview
Personal blog and portfolio of Sujeet Jaiswal, a Principal Software Engineer crafting exceptional user experiences through innovative frontend architecture and scalable design systems.
News
Intersection Observer API: visibility without scroll listeners
How Intersection Observer defers visibility work to the browser, what root, rootMargin, scrollMargin, and thresholds actually mean, when callbacks fire in the rendering pipeline, the cross-origin and V2 (trackVisibility) caveats, and when to reach for a d
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Web Components: Custom Elements, Shadow DOM, and practical boundaries
A senior-level tour of Custom Elements, Shadow DOM, templates and slots, lifecycle semantics, styling and accessibility at the encapsulation boundary, form association, and framework interoperability - with clear criteria for when standards-native compone
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Slack: Scaling a Real-Time Messaging Platform from Monolith to Distributed Architecture
How Slack scaled from a PHP monolith to a distributed architecture - migrating to Vitess for flexible sharding, building Flannel for edge caching, and adopting cellular infrastructure for 99.99% availability - all without a big-bang rewrite.
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Uber: From Monolith to Domain-Oriented Microservices
Uber's three-phase architecture evolution - from a Python/Node.js monolith to 4,000+ microservices to Domain-Oriented Microservice Architecture (DOMA) - showing how each phase solved scaling bottlenecks while creating new organizational challenges.
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AWS Kinesis 2020 Outage: Thread Limits, Thundering Herds, and Hidden Dependencies
A deep-dive into the 2020 AWS Kinesis outage where a routine capacity addition hit an OS thread limit, cascading through CloudWatch, Lambda, and Cognito for 17 hours due to O(N2) scaling and hidden dependencies.
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