--- title: Best ITNEXT posts — June 2025 | daily.dev description: The most upvoted ITNEXT posts from June 2025, curated by the daily.dev community. canonical: https://daily.dev/sources/itnext/best-of/2025/06 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/sources/itnext/best-of/2025/06 og:type: website og:site_name: daily.dev og:title: Best ITNEXT posts — June 2025 | daily.dev og:description: The most upvoted ITNEXT posts from June 2025, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of ITNEXT — June 2025 1. 1 [](https://daily.dev/posts/hacker-screen-builder-7nlc9wfsu "Hacker Screen Builder") Article ITNEXT · 1y Hacker Screen Builder A web-based tool that creates cinematic hacker-style interfaces through drag-and-drop widgets including satellite maps, 3D globes, progress bars, and facial recognition animations. Built using AI assistance from ChatGPT for ideation, Google AI Studio for frontend generation, and GitHub Copilot for backend development. Features customizable widgets, screen testing, and shareable links for saved configurations. 230 13 2. 2 [](https://daily.dev/posts/how-to-start-your-own-mcp-server-with-n8n-29jqecu6r "How to Start Your Own MCP Server with n8n") Article ITNEXT · 1y How to Start Your Own MCP Server with n8n n8n version 1.88.0+ includes built-in Model Context Protocol (MCP) support, allowing users to expose workflows as AI-usable tools through MCP Server Trigger nodes and connect to other MCP servers via MCP Client Tool nodes. The guide covers setting up MCP endpoints, configuring authentication, exposing tools, and connecting with AI agents, all without requiring additional installations or Docker images. 68 3. 3 [](https://daily.dev/posts/abstractions-done-right-discussing-when-it-is-worth-or-not-k4vx7dke5 "Abstractions Done Right: Discussing When It Is Worth Or Not") Article ITNEXT · 1y Abstractions Done Right: Discussing When It Is Worth Or Not Abstractions like interfaces and layered architectures are valuable when used correctly, not just for replacing implementations but for deferring decisions and isolating concerns. The author advocates for a 4-layer approach (UI, Application, Domain, Infrastructure) that enables vertical development and reduces cognitive load. Two real-world examples demonstrate when abstractions provide clear value (migrating from serverless to Kubernetes) versus when they create unnecessary overhead (simple Step Function tasks). The key is understanding that abstractions' main benefit is enabling focused development and clearer intent, with implementation flexibility as a bonus. 45 1 4. 4 [](https://daily.dev/posts/how-we-load-test-argo-cd-at-scale-1-000-vclusters-with-gitops-on-kubernetes-mmppcy7vr "How We Load Test Argo CD at Scale: 1,000 vClusters with GitOps on Kubernetes") Article ITNEXT · 1y How We Load Test Argo CD at Scale: 1,000 vClusters with GitOps on Kubernetes A comprehensive load testing experiment demonstrates how Argo CD performs at scale with up to 1,000 virtual clusters using vCluster technology. The test reveals practical scaling limits: Argo CD handles around 500 applications and 50-60 clusters before requiring significant tuning. Key findings include memory pressure on Application Controllers around 100 vClusters, the need for resource limit adjustments, and architectural considerations for multi-tenant GitOps platforms. The experiment used over €20,000 worth of infrastructure on STACKIT and provides detailed insights into component-specific bottlenecks, optimization strategies, and alternative approaches like Kargo for enterprise-scale deployments. 14 5. 5 [](https://daily.dev/posts/rich-errors-in-kotlin-2-4-say-goodbye-to-boring-try-catch-or-not-quite-yet--iqga8fhjw "Rich errors in Kotlin 2.4: say goodbye to boring try/catch or not quite yet?") Article ITNEXT · 1y Rich errors in Kotlin 2.4: say goodbye to boring try/catch or not quite yet? Kotlin 2.4 introduces Rich Errors, a new error handling approach using union types that allows functions to return multiple possible types like \`User | NetworkError | NotFound\`. This feature makes error handling explicit at the type level, eliminating the need for Result wrappers or verbose sealed classes. The compiler enforces handling of all possible error cases, making code more predictable and type-safe. While currently experimental, Rich Errors offer a cleaner alternative to traditional try/catch blocks for expected business logic failures, though they're not suitable for truly exceptional system errors. 10 [See all ITNEXT archives](/sources/itnext/best-of) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@graph":[{"@type":"CollectionPage","@id":"https://daily.dev/sources/itnext/best-of/2025/06#page","url":"https://daily.dev/sources/itnext/best-of/2025/06","name":"Best ITNEXT Posts — June 2025","description":"The most upvoted ITNEXT posts from June 2025, curated by the daily.dev community.","isPartOf":{"@type":"WebSite","url":"https://daily.dev"}},{"@type":"ItemList","@id":"https://daily.dev/sources/itnext/best-of/2025/06#items","numberOfItems":5,"itemListElement":[{"@type":"ListItem","position":1,"url":"https://daily.dev/posts/hacker-screen-builder-7nlc9wfsu","name":"Hacker Screen Builder"},{"@type":"ListItem","position":2,"url":"https://daily.dev/posts/how-to-start-your-own-mcp-server-with-n8n-29jqecu6r","name":"How to Start Your Own MCP Server with n8n"},{"@type":"ListItem","position":3,"url":"https://daily.dev/posts/abstractions-done-right-discussing-when-it-is-worth-or-not-k4vx7dke5","name":"Abstractions Done Right: Discussing When It Is Worth Or Not"},{"@type":"ListItem","position":4,"url":"https://daily.dev/posts/how-we-load-test-argo-cd-at-scale-1-000-vclusters-with-gitops-on-kubernetes-mmppcy7vr","name":"How We Load Test Argo CD at Scale: 1,000 vClusters with GitOps on Kubernetes"},{"@type":"ListItem","position":5,"url":"https://daily.dev/posts/rich-errors-in-kotlin-2-4-say-goodbye-to-boring-try-catch-or-not-quite-yet--iqga8fhjw","name":"Rich errors in Kotlin 2.4: say goodbye to boring try/catch or not quite yet?"}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Sources","item":"https://daily.dev/sources"},{"@type":"ListItem","position":3,"name":"ITNEXT","item":"https://daily.dev/sources/itnext"},{"@type":"ListItem","position":4,"name":"Best of","item":"https://daily.dev/sources/itnext/best-of"},{"@type":"ListItem","position":5,"name":"June 2025"}]}]} ```