Using HTTP Status Codes in APIs for Easier Debugging

🚀 Constructor References (Java) A constructor reference refers to the constructor of a class. The syntax is `ClassName::new`. This is useful when you need to create new objects within a lambda expression. Constructor references simplify the process of object creation when a functional interface expects a supplier of objects. #Java #JavaDev #OOP #Backend #professional #career #development

Devlog #13 - PulseNotify Continuing with the microservice: user-service - UserAccountRepository and UserPreferenceRepository created - DTOs as Java Records: CreateUserRequest and UserResponse - Fixed a timezone issue in the Flyway migration and the UserService entity to avoid future bugs Repo: https://lnkd.in/d4rtYMAa #Java #SpringBoot #Microservices #BuildingInPublic #TechJobs

💡 A Java Mistake That Can Slow Down Your API I once wrote this inside a loop: for (User user : users) { userRepository.save(user); } It worked… but performance was terrible 👉 Problem: - Each "save()" call hits the database - Multiple round trips = slow API ❌ N database calls for N records ✅ Better approach: userRepository.saveAll(users); 🔥 Why this matters: - Reduces DB calls - Improves performance significantly - Better for bulk operations 📌 Rule: Avoid DB calls inside loops whenever possible Think in batches, not single operations. Small change. Massive performance gain. Have you optimized something like this before? 👇 #Java #SpringBoot #Programming #SoftwareEngineering #Coding #BackendDevelopment #CleanCode #Performance #TechTips

Devlog #14 - PulseNotify Service layer for user-service done. Today: - UserNotFoundException and UserAlreadyExistsException for specific error handling and GlobalExceptionHandler with @ControllerAdvice for structured API responses - UpdateUserRequest DTO as Java Record - UserService with full CRUD + deactivate method Tomorrow I can start with the controller and probably the tests. Step by step the project keeps growing, consistency is key. Link to Github in comments #Java #SpringBoot #Microservices #BuildingInPublic #TechJobs

Building RESTful APIs is a core skill for every Java developer. 🔹 Design clean and scalable APIs 🔹 Develop using Spring Boot 🔹 Handle HTTP methods effectively 🔹 Ensure security and performance Mastering RESTful APIs helps create robust and production-ready applications. #Java #RESTAPI #SpringBoot #JavaDeveloper #BackendDevelopment #FullStackDeveloper #WebDevelopment #Programming #SoftwareDevelopment

Faced random failures in production API. No clear pattern. After digging, found connection pool was getting exhausted. Connections weren’t closing properly. Fixed config + leaks. System became stable. Lesson: resources matter more than logic sometimes. #Backend #APIs #Debugging #Java

The ultimate Java Backend Cheat Sheet. 📄🔥 Everything you need to master: 🔹 Core & Advanced Java 🔹 Spring Boot & REST APIs 🔹 SQL & Performance Tuning 🔹 Testing (JUnit/Mockito) 🔹 Git & GitHub Download/Save the document below! Found this helpful? 👉 Follow Surya Mahesh Kolisetty for more. 👉 Repost for your fellow devs. #SoftwareDevelopment #Backend #Java #LearningResources #TechTips #Developers #cfbr #connections

When to use Java Streams (and when not)  Java Streams can make code clean and expressive.  But from experience:   ✔ Use Streams for simple transformations   ✔ Avoid them when logic becomes complex   ✔ Prioritize readability over clever code  Just because you can use Streams doesn’t mean you should.  #Java #JavaStreams #CleanCode #BackendDevelopment

🚨 Hot take: Most “async” Java code isn’t actually asynchronous — it’s just parallel blocking. I recently reviewed a service using CompletableFuture everywhere… ⚠️ but response time was still bad. ❓ Why? Because .get() was called almost immediately after supplyAsync(). 👉 At that point, the code not doing async — the code just adding complexity. 💡 What actually made a difference: ✅ Letting futures complete without blocking 🔗 Combining results instead of waiting on each call ⚙️ Controlling thread pools instead of relying on defaults 🚫 Async done wrong = harder debugging, unstable latency, pressure on downstream systems 🚀 Async done right = better orchestration, not just faster code 🧠 Most systems don’t have a performance problem — they have a design problem disguised as async. 💬 Curious — how often have you seen “fake async” in real projects? #Java #SystemDesign #Microservices #BackendEngineering #AsyncProgramming #TechLeadership

One of the most valuable Java patterns in production: Immutable DTOs with Records + Builder: In real-world Java applications (Spring Boot APIs, microservices, event systems), we create hundreds of DTOs. The best modern pattern in 2026: Records (immutable by default) + Builder pattern for flexible construction.Benefits:Immutable → thread-safe and predictable No boilerplate getters/setters Builder gives nice fluent API for optional fields Excellent integration with Jackson, validation, and MapStruct Realistic production example below #Java #SpringBoot