Architecture | Object-Oriented vs Functional Programming (And Why the Argument Is Wrong)

Architecture Object-Oriented Programming Functional Programming Clean Code Software Design

OO and FP are often framed as opposing ideologies. In practice, they solve different problems, impose different disciplines, and work best together.

20 December 2025

Architecture | Hexagonal vs Clean Architecture in Spring Boot

Architecture Hexagonal Architecture Clean Architecture Spring Boot

A practical comparison of Hexagonal and Clean Architecture, based on real-world Spring Boot systems.

20 December 2025

Architecture | Hexagonal Architecture for Real-World Systems

Architecture Hexagonal Architecture Clean Code Spring Boot Microservices

After years of building event-driven systems in finance, energy, and government, Hexagonal Architecture has become my default for keeping complex systems testable, resilient, and adaptable.

15 December 2025

Spring Boot | Adding Robustness with Spring Retry Annotations

Spring Boot Retryable Backoff Resilience Java Clean Code

How to use Spring Retry to transparently handle transient failures, including configurable max attempts and exponential backoff, with practical examples.

07 October 2025

Java | Java NullPointerException Avoidance and Enhancement Tactics

Java NullPointerException TimeUnit Objects String Enum Clean Code

A guide to avoiding NullPointerExceptions in Java, with practical tips and techniques to enhance code quality.

26 May 2025

Java | Pattern match Optional in Java 21

Java Pattern Matching Optional Java 21

A trick to get pattern matching on Optional in Java 21, but one you'll probably never actually use.

22 May 2025

Apache HttpClient Classic APIs | A Quick Guide

Java HttpClient Apache APIs HTTP

As a Java developer, I’ve used Apache HttpClient Classic APIs to handle HTTP requests. Here’s my guide to mastering HTTP requests with Apache HttpClient Classic APIs, with real-world tips.

21 May 2025

Java | Why I Avoid Checked Exceptions

Java Exceptions Clean Code Spring Boot

As a Java developer, I’ve ditched checked exceptions - here’s why they’re a hassle and how to handle exceptions better.

07 May 2025

Java | Hashing for Secure and Efficient Code

Java Hashing Security Clean Code Spring Boot

As a Java developer, I’ve used hashing to secure data in projects like ESG Global’s BOL Engine. Here’s my guide to creating hashes in Java, with real-world tips.

06 May 2025

Java, Spring Boot & AWS | Publisher-Subscriber Pattern Using SNS & SQS

Java AWS Spring Boot SNS SQS

As a Java developer, I’ve used AWS SNS and SQS to build scalable pub/sub systems. Here’s how to implement the publisher-subscriber pattern in Spring Boot for loosely coupled microservices.

05 May 2025

Java | Records for Simpler, Cleaner Code

Java Records Clean Code Spring Boot Immutability

As a Java developer, I’ve used records to cut boilerplate in projects like Mosaic Smart Data’s pipeline. Here’s my beginner-friendly guide to mastering Java records.

04 May 2025

Java | Functional Interfaces for Cleaner Code

Java Functional Programming Lambda Expressions Spring Boot Clean Code

As a Java developer, I’ve used functional interfaces to streamline projects like Mosaic Smart Data’s real-time pipeline. Here’s my guide to mastering them for cleaner, more maintainable code.

03 May 2025

Java | Formatting Code Snippets in Javadoc

Java Javadoc Documentation

As a Java developer, I’ve used Javadoc to document APIs for projects like Mosaic Smart Data. Here’s how to format code snippets correctly with Javadoc.

02 May 2025

Java | A Random Pitfall

Java Random Math ThreadLocalRandom AtomicLong AtomicReference

As a Java developer, I hit a performance snag with java.util.Random in multi-threaded systems. Here’s how I fixed it with ThreadLocalRandom.

01 May 2025

Java | Immutables - No Setters Allowed

Java Immutables Lombok Clean Code Spring Boot Apache Kafka

As a Java developer, I’ve used immutables to make projects like Mosaic Smart Data’s pipeline bulletproof. Here’s why immutables shine and how to avoid setters.

30 April 2025

Clean Coding | Four Principles to Boost Your Team’s Productivity

Software Development Clean Code Junit Java TDD testcontainers Mockito Spring Boot Apache Kafka

Four clean code principle - testing, naming, SRP, & side-effect-free functions, that helped transform my projects and doubled productivity.

28 April 2025

Git | How to Undo Your Git Failure?

Git Version Control Development

Using `git reflog` and `git reset` to Save Your Code

27 April 2025

GitHub Flow | A Java Developer’s Guide to Streamlined Collaboration

GitHub Workflow Java Collaboration

As a Java developer, I’ve used GitHub Flow to manage projects like Mosaic Smart Data’s real-time API pipeline. Here’s how its branch-based workflow keeps teams productive and code deployable.

26 April 2025

Digital Minimalism | Staying Focused in a Noisy Tech World

Social Media Minimalism Technology

As a Java developer, I’ve learned to manage digital distractions using minimalism principles. Here’s how I use five strategies to stay productive and focused.

20 March 2025