The hottest Scalability Substack posts right now

Scalability is crucial for software systems to handle increasing demand and data.
Building scalable systems can involve horizontal scaling (adding more machines) or vertical scaling (adding more resources to the same machine).
Cloud technologies, like auto-scaling and managed databases, offer solutions for building scalable systems.

When using modern frameworks like NextJS or Remix, running on serverless infrastructure is common and efficient.
Deploying a NextJS app on Vercel leverages serverless/edge functions, leading to better scaling without nodejs event loop limitations.
For more control and customization, consider options like deploying NextJS in a containerized, auto-scalable environment or creating a custom framework using vite-plugin-ssr.

When designing a system for image uploading, it's important to consider technical concerns such as displaying, authorizing, validating, processing, storing, and associating the images.
Tradeoffs to think about include scaling to handle large uploads efficiently, ensuring security to prevent vulnerabilities, managing authorization based on business logic, and maintaining consistency in the image uploading workflow.
A well-designed image uploading system should support creating and using various image variants, offloading processing to separate services, ensuring consistent growth across subsystems, and establishing clear architectural boundaries for scalability.

Compound growth is crucial, but customer retention is key to sustained success.
Once you find product-market fit and decent retention, focus on growing consistently.
Prepare for growth: mindset, organization, and the right team are essential for scaling successfully.

Security-clueless companies often focus too much on fancy network devices like firewalls and IDS without considering the human element, a key weak point in security.
Be cautious of companies that claim their products or solutions are 'secure' without specifying what threats they protect against or how they handle unexpected disasters.
Companies that overlook scalability, high-availability, and the importance of cryptography in their security solutions may not fully understand the comprehensive nature of security.

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As companies grow, they often need to add complex features to their products, which can be overwhelming. A simple way to manage this complexity is by using tags to help organize information better.
Tags allow users to categorize items in multiple ways, making it easier to find what they need. Unlike folders, tags let you label something with several different tags without duplication.
Implementing a tagging feature is essential for products as they scale, providing flexibility and improving user experience. It helps keep things organized even when users have lots of content.

The Fusaka upgrade will make Ethereum faster and more efficient by increasing the amount of data it can handle at once, allowing for smoother transactions.
New features like PeerDAS will help Ethereum check data more efficiently, making it less demanding on resources and potentially lowering costs for users.
With better fee structures and usability updates, the Fusaka upgrade aims to create a more user-friendly experience, making it easier for everyone to use Ethereum.

Ethereum’s activity rose sharply after the Fusaka upgrade, with daily transactions up about 50% and active addresses up roughly 60%, but a notable portion of that growth comes from address‑poisoning dust rather than organic usage.
Analysis of USDC and USDT balance updates shows many transfers are tiny dust amounts—about 43% under $1 and 38% under $0.01—often sent by a small number of accounts to millions of wallets.
Dust seeding now explains roughly 10–15% of transactions and 25–35% of active addresses on a typical day. Using adjusted metrics and wallet UI changes can help highlight real economic activity and reduce user risk.