Had a blast recording 2 podcast episodes today talking about Java, Spring, and my new book Fundamentals of Software Engineering! 🎙️ Can't wait to share them when they go live. fundamentalsofswe.com

One of my goals this year is building better systems. This video from @DrJustinSung really resonated - 13 years of productivity advice condensed into 67 minutes. His key insight: don't trust your brain, trust your system. www.youtube.com/watch?v=fXyR...

Spring Boot 4 finally has a dedicated OpenTelemetry starter. No more pulling in actuator just for observability. Metrics, traces, and logs via OTLP out of the box. youtu.be/6_Y41z7OIv8

🚀Build a Spring Boot 4 REST API from scratch. ⛔ No XML. ⛔No manual Tomcat config. 🧑🏻‍💻Just code and run. If you're new to Spring, this is a great place to start: youtu.be/klnxzL8oQdM

3 ways to load resources in Spring: ✅ Value + Resource → compile-time paths ✅ ResourceLoader → runtime/dynamic paths ✅ ResourcePatternResolver → pattern matching (*.sql) Stop hardcoding file reads. Use the right tool for the job. youtu.be/Hmcgwj65Unw

🎙️Episode 02 of the Fundamentals of Software Engineering Podcast is out. This week @nts.bsky.social and I get real about developer burnout. The always learning treadmill, invisible work, and why saying no might be your most important skill. youtu.be/wplFAoMYTtg

🔒Spring Security 7 adds built-in MFA support. EnableMultiFactorAuthentication + smart redirects that handle missing factors automatically. Here's how to set it up: youtu.be/KmNAqlaKwjw

Need to load resources in Spring? Here are some recommended approaches: • Value + Resource (classpath, file, URL) • ResourceLoader for runtime paths • ResourcePatternResolver for pattern matching Each has its use case. Check it out 👇 github.com/danvega/reso...

📚 My new book is here! "Fundamentals of Software Engineering: From Coder to Engineer" with @nts.bsky.social is now available from O'Reilly. 15 chapters covering the skills that take you beyond just writing code. Watch the full announcement: youtu.be/C7hPLFUaSZA

Happy Fundamentals of Software Engineering Release Party Day. You can now get the book on Amazon 🥳 www.amazon.com/Fundamentals...

🚀Spring Boot 4 introduces the new JMS Client, a fluent API that brings the same developer experience as the Rest Client and JDBC Client to messaging. Full tutorial: youtu.be/91xVrWlzIe4

🚀 Spring Data AOT repositories just changed how I think about startup performance. 💨 Build-time repository processing = 50-70% faster startup + easier debugging. ✨ No more runtime magic, you can actually see the generated SQL and implementations youtu.be/s_kmDbitE8s

Black Friday Sale starts today! Get my "AI for Java Developers" course for FREE 👇🏻 www.youtube.com/watch?v=FzLA...

I'm documenting Spring Boot 4 features with: ✅ Code examples ✅ Video tutorials ✅ Blog deep-dives All organized in one central repo 👇 github.com/danvega/sb4

🚀 Just pushed a demo showing why Spring Data AOT matters for performance! Move query parsing from runtime to compile-time: ✅ 50-70% faster startup ✅ Catch typos before deployment ✅ Pre-generated SQL at build time ✅ GraalVM native-ready github.com/danvega/spri... New in Spring Boot 4

New Profile Pic

Spring Framework 7 adds a new fluent JMS Client similar to the RestClient and JdbcClient that were added in Spring Boot 3.2. I put together a quick repository to show it off 👇🏻 github.com/danvega/jms-...

Unlike @danvega.dev I am not an expert on video but Dan taught me you have to just do it so here you go. Delighted to announce our book, Fundamentals of Software Engineering is now available at your favorite book shop as well as on O’Reilly learning.oreilly.com/library/view... Enjoy!

🔥Spring Framework 7 brings retry and resilience features right into core! No more extra dependencies needed. In my new video, I build a food delivery app showing Retryable, RetryTemplate, and concurrency limits in action. Watch: youtu.be/CT1wGTwOfg0 #SpringBoot #Java

I'm overwhelmed with so many emotions right now, mostly joy. I'm proud of how far I've pushed myself. If you had told that kid struggling to learn programming 24 years ago that this is how life would turn out, he never would have believed you.

Jackson 3 lands in Spring Boot 4! The new JsonMapper replaces ObjectMapper with immutable, thread-safe configs. Better date handling, unchecked exceptions for cleaner lambdas, and JSON views for precise serialization control. Watch: youtu.be/4cvP_qroLH4 #SpringBoot #Java

Just showed how to build MCP clients with Spring AI! 🤖 Pull in multiple MCP servers to add context and functionality to your AI apps. Built a client using my DVAAS server to answer questions about my content that LLMs can't normally access. ✨ Watch: youtu.be/TSFkdlreRMQ

I use custom slash commands for a variety of tasks. In this one I replaced some custom bash script I wrote that will create the initial markdown with the correct yaml front matter for this new blog post 🤖✨

🚀 MCP (Model Context Protocol) + Java You already know Spring AI lets you build MCP Servers in #Java ✅ But did you know: You can also build MCP Clients! 🎯 Just configure your MCP servers in application.yaml and Spring AI handles the rest 💫

Did you know that I have an MCP Server 🤖 Yes I realize that not everyone needs this but it was a chance to build out a real MCP Server in Spring AI and share it with all of you. This is in the clouds ☁️ so you can test it out with whatever host you use. www.danvega.dev/mcp

🍩 Spring Boot 4 + Jackson 3 just made client-side @JsonView filtering SO much cleaner! Before: Wrap objects in MappingJacksonValue 😫 Now: Just use .hint() 🎯

Spring Boot 4's dependency tree showing Jackson 3 in action! Notice the new tools.jackson.* packages (Jackson 3 core) alongside com.fasterxml.jackson.annotations:2.20. This isn't a mistake, Jackson 3 deliberately shares annotations with v2 for compatibility 🎯

🚀 Creating REST APIs in Spring Boot 4 just got EASIER! My new video shows how @ImportHttpServices eliminates all the proxy factory boilerplate. One annotation replaces 10+ lines of config (per client). Service communication simplified. Watch: youtu.be/TEd5e4Thu7M

Spring Boot 4 makes HTTP interface configuration SO much cleaner! 🎯 No more manual proxy factories and boilerplate. Just use ImportHttpServices and you're done. From 5+ lines of config per client → 1 annotation ✨

🚀 Spring Boot 4 tip: Jackson 3 brings JsonMapper as the preferred way to read JSON! Notice the new import. No more ObjectMapper from com.fasterxml! JsonMapper is now your go-to for JSON operations in modern Spring apps.

🎉 Spring Framework 7 brings retry capabilities INTO core! No more external spring-retry dependency needed! Reach for the RetryTemplate When you need MORE control than Retryable can give you 💪

Want to learn how to build a GraphQL API in #Java in less than 20 minutes? I got you covered in this talk I gave at SpringOne this year. www.youtube.com/watch?v=bXxp...

Just published a new video on Spring Boot 4's null safety features with JSpecify! Finally, nullness is explicit in your APIs, no more guessing what might return null. Your future self will thank you. Watch: youtu.be/QlGnaRoujL8 #SpringBoot #Java #NullSafety

Just dropped a new video showing off one of my favorite features coming in Spring Framework 7: the Rest Test Client! This makes resting APIs so much easier with one API for everything: unit tests, integration tests, and full server tests. Watch me build tests in minutes: youtu.be/dPM8n0uNhes

I love how easy to use the new RestTestClient is in Spring Boot 4. It has a nice fluent API and I can use it for all different types of tests. Here is my first look at the RestTestClient 👇🏻 www.youtube.com/watch?v=dPM8...

Spring Boot 4 just made API versioning SO much easier! No more rolling your own solution, now you get path segments, headers, query params, and more built-in. Finally, consistency across teams! Watch how it works: youtu.be/qjo2tYf01xo #SpringBoot #Java

Spring Boot 4's new BeanRegistrar interface finally gives us a clean way to register beans programmatically! No more wrestling with BeanFactoryPostProcessor for dynamic registration. Perfect for conditional loading & performance optimization 🚀 Blog: danvega.dev/blog/programmatic-bean-registration

To go along with our new book, @nts.bsky.social and I are launching a podcast. This will allow us to dive deeper on a lot of the topics we cover in the book. If you want to be notified when the first episode is live you can subscribe below 👇🏻 www.youtube.com/@Fundamental...

Nice addition to the Spring Initializr 🤩

I'm working toward 100K subscribers on YouTube! 🎯 If my Spring Boot, Java, and Spring AI tutorials have helped you become a better developer, I'd really appreciate your support. Every subscription helps me create more content for the community 🙏 Subscribe → youtube.com/@danvega

Spring Framework 7 introduces the Bean Registrar interface for programmatic bean registration. Finally, a clean way to register beans dynamically based on environment properties or complex logic! youtu.be/yh760wTFL_4 #SpringFramework #Java #SpringBoot4

Spring Boot 4 tip: Collections with nullable elements (List<Nullable String>) help catch NullPointerExceptions at compile-time instead of runtime. No more surprises when processing API responses that might contain null values! 🛡️ #SpringBoot #javabh

Spring Boot 4's null-safety is here! 🎯 @NullMarked (JSpecify + NullAway) makes nullness explicit. No more guessing if findUserByEmail() returns null. IDE catches NPEs at compile-time. Your type signatures finally tell the truth.

Learn how to test REST APIs in Spring Framework 7 with the new RestTestClient. I love how flexible this is and how easy it is to work with thanks to the clean fluent API. www.danvega.dev/blog/spring-...

Spring Boot 4.0.0 RC1 is here! 🚀 176 enhancements, modularization complete, RestTestClient support, and Spring Framework 7.0. What features are you looking forward to with the release of Spring Framework 7 and Spring Boot 4 next month? 👇 spring.io/blog/2025/10...

🤖When we think of Agentic Tools or Coding Agents the first thing that comes to mind is the ability to write code. In my latest tutorial I show off 2 of my favorite use cases for agents that don't involve writing a single line of code! youtu.be/QlWyrYuEC84

🤖 Claude Code on the Web is here. What is it and when you should you reach for it? youtu.be/piu3UK20lI8

Google AI Studio just added a Build feature and it's pretty cool! 🚀 You can prototype UIs by describing what you want, watch it think through the design, and deploy straight to GitHub. Best part? It's FREE. Great for backend devs who need quick UI mockups! youtu.be/11L34s72s6U

Want to build your own MCP server? 🚀 In this tutorial I show you how to do this with Spring AI in minutes. This protocol is as important as HTTP was to the internet. Write once and works with any LLM. Leverage your existing #Java skills 🤖👨🏻‍💻👩🏻‍💻 youtu.be/MarSC2dFA9g

Just built a custom compacting chat memory advisor in Spring AI! When context windows fill up, it automatically summarizes conversations instead of clearing them. Think /compact command in Claude Code but for your Spring apps 🚀 Watch: youtu.be/hyK20bn38lM