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DSDoogal Simpsondoogal.dev3d ago · 5 min read

How Adaptive Bitrate Streaming Works

Ever wonder why a streaming video suddenly drops to blurry 360p and then instantly snaps back to crisp 1080p? This happens because modern video platforms use Adaptive Bitrate Streaming (ABS). The vide

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RGRitik Guptaritikguptablogs.hashnode.dev4d ago · 5 min read

THG SDE-2 Interview Experience: From Refactoring a Java API to Designing a Scalable Newsletter System

I interviewed with The Hut Group (THG) for an SDE-2 position, and I found the interview process both challenging and refreshing because it focused on practical software engineering skills rather than

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DSDoogal Simpsondoogal.dev5d ago · 6 min read

How HyperLogLog Counts Billions of Views with 12KB RAM

TL;DR: HyperLogLog (HLL) is a probabilistic data structure that estimates cardinality (unique counts) with minimal memory. Instead of storing millions of unique IDs, it hashes incoming data and tracks

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YKYash Khetansystemdesign101.hashnode.dev6d ago · 10 min read

System Design 101: How Would You Build a URL Shortener?

I've always found system design a little weird. You start with a seemingly simple problem, and five minutes later you're talking about load balancers, database replicas, caching, sharding and distribu

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DSDoogal Simpsondoogal.devAug 11 · 5 min read

How Defensive UI Design Prevents Production Outages

When a system failure occurs, firing the operator who triggered it does absolutely nothing to prevent the next incident. Real reliability comes from building fault-tolerant user interfaces and process

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DSDoogal Simpsondoogal.devAug 11 · 4 min read

Why Exponential Math Breaks Software Scaling

TL;DR Humans struggle to intuitively grasp exponential growth and probability, like the 1-in-33-million odds of flipping 25 consecutive heads. While the gambling industry exploits this cognitive gap f

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DSDoogal Simpsondoogal.devAug 8 · 5 min read

Premature Optimization: What Donald Knuth Actually Meant

Quick Answer: The famous quote "premature optimization is the root of all evil" is often misunderstood. Donald Knuth actually wrote that we shouldn't pass up opportunities in a "critical 3%" of cases.

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AKAmit kumaramitp-dev.hashnode.devAug 4 · 6 min read

From 70 Excel Sheets to a Digital Planning System: An Architecture Story

For years, our production and sales planning ran on Excel. Not one file — a set of roughly 70 interconnected sheets, each owned by a different planner, each with its own formulas, macros and joins. So

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ABAbu Bakkar Siddiquesolodevabu.hashnode.devAug 4 · 6 min read

How Batching Increased My Throughput from 342 req/s to 1,259 req/s

While building the webhook delivery system, my API could only handle around 350 requests per second. The architecture looked fine, Redis wasn't the bottleneck and the workers were running normally. Af

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DADaniel Anthony Romitelli Jrcraftedbydaniel.hashnode.devAug 3 · 5 min read

Messages Need a Protocol Before They Need a Chat UI

A patient taps a kiosk and asks for help. A staff member replies from another screen. The same message may appear in the app, trigger a push notification, fall back to Short Message Service (SMS), and

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#systemdesign

Explore Hashnode

Trending tags this week

How Adaptive Bitrate Streaming Works

THG SDE-2 Interview Experience: From Refactoring a Java API to Designing a Scalable Newsletter System

How HyperLogLog Counts Billions of Views with 12KB RAM

System Design 101: How Would You Build a URL Shortener?

How Defensive UI Design Prevents Production Outages

Why Exponential Math Breaks Software Scaling

Premature Optimization: What Donald Knuth Actually Meant

From 70 Excel Sheets to a Digital Planning System: An Architecture Story

How Batching Increased My Throughput from 342 req/s to 1,259 req/s

Messages Need a Protocol Before They Need a Chat UI