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How Key value Stores Work (Redis, DynamoDB, Memcached)? The Modern Software Stack
In today’s world, building software means working across multiple layers, each with its own role, tools, and technologies. Here are 9 layers that make up most modern applications:
Over to you: Which layer do you think is the most underrated in modern software development? Data-in-Motion Transparency (Sponsored)
Your backend makes thousands of encrypted connections daily. What sensitive data is flowing through them? Which processes are talking to which APIs? Traditional tools can't tell you without proxies, cert management, or performance hits. Qtap changes that. This lightweight eBPF agent gives you kernel-level visibility into all TLS/SSL traffic—showing you the actual unencrypted payloads, their originating processes, and full context. Zero performance impact. No code changes. Whether you're debugging API issues, auditing for sensitive data leaks, validating compliance, or investigating third-party integrations, Qtap illuminates what was invisible. Concurrency is NOT Parallelism
Concurrency: It’s a design approach where tasks can start, run, and complete in overlapping periods, even on a single CPU core. It is about managing multiple tasks at the same time. The CPU rapidly switches between tasks (context switching), creating the illusion that tasks are progressing simultaneously, though they are not. Concurrency is great for tasks that involve waiting, like I/O operations. It allows other tasks to progress during the wait, improving overall efficiency. Parallelism: Refers to the simultaneous execution of multiple tasks, using multiple CPU cores. Parallelism excels at heavy computations like data analysis or rendering graphics, where tasks can be divided and run simultaneously on different cores. How They Work Together It's important to note that while concurrency and parallelism are different concepts, they are closely related. A well-designed concurrent program can scale to use multiple cores for parallelism when needed. By understanding the differences and interplay between concurrency and parallelism, we can design more efficient systems and create better-performing applications. Over to you: Have you encountered any challenges with concurrency or parallelism? Out Ship, Out Deliver, Out Perform. (Sponsored)
DevStats helps engineering leaders unpack metrics, experience flow, and ship faster so every release drives real business impact. ✅ Spot bottlenecks before they stall delivery ✅ Tie dev work to business goals ✅ Ship more, miss less, prove your impact It’s time to ship more and make your impact impossible to ignore. JWT vs PASETO: The Two Players of Token-Based AuthenticationToken-based authentication has become quite popular over the years. Traditionally, JWTs have dominated this space.
But now, a new player is making waves: PASETO, or Platform-Agnostic Security Tokens. So, what’s the difference between the two?
Over to you: Have you used JWTs or PASETO in your applications? The Linux Cron CheatsheetCron is a time-based job scheduler that allows users to automate repetitive tasks by running commands or scripts at specified intervals. It uses a Cron expression, a syntax defining the schedule, which consists of five fields (minute, hours, day, month, weekday).
Cron is widely for system maintenance, backups, log rotation, and automation of tasks like sending emails or running scripts at regular intervals. In this cheatsheet, we cover:
Over to you: Have you used Cron? AI Agent versus MCP
An AI agent is a software program that can interact with its environment, gather data, and use that data to achieve predetermined goals. AI agents can choose the best actions to perform to meet those goals. Key characteristics of AI agents are as follows:
Model Context Protocol (MCP) is a new system introduced by Anthropic to make AI models more powerful. It is an open standard that allows AI models (like Claude) to connect to databases, APIs, file systems, and other tools without needing custom code for each new integration. MCP follows a client-server model with 3 key components:
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