// tutorials · 22 articles
Software engineering tutorials
Deep, practical walkthroughs of the topics covered on the MasterLAB Systems channel — Java, Spring Boot, microservices, DevOps, containers, cloud and system design.
Spring Boot Microservices Architecture Explained Step by Step
A complete, beginner-friendly walkthrough of microservices architecture using Spring Boot — services, gateway, discovery, config and observability.
How to Build a Spring Cloud Config Server
Step-by-step guide to building a centralized configuration server with Spring Cloud Config, Git-backed properties and dynamic refresh.
Dockerizing a Spring Boot Application: The Right Way
Build small, fast and secure Docker images for Spring Boot using multi-stage builds, layered jars and JVM container tuning.
CI/CD Pipeline with GitHub Actions and Docker
Build a complete CI/CD pipeline that tests, builds and pushes a Spring Boot Docker image on every push using GitHub Actions.
API Rate Limiting in Spring Boot with Bucket4j and Redis
Protect your APIs from abuse with per-user and per-IP rate limiting using Bucket4j, Redis and a clean filter-based implementation.
Deploying Spring Boot to AWS: ECS Fargate End-to-End
Containerize a Spring Boot app, push to ECR, run on ECS Fargate behind an Application Load Balancer — production-ready in one tutorial.
Kubernetes Basics for Java Developers
Everything a backend developer needs to know about Kubernetes — Pods, Deployments, Services, Ingress and ConfigMaps — explained with a Spring Boot example.
Service Discovery with Eureka in Spring Boot
How service discovery works, why you need it, and how to set up Netflix Eureka with Spring Cloud step by step.
Building REST APIs with Spring Boot: A Complete Guide
Design and build a production-ready REST API with Spring Boot — proper layering, DTOs, validation, error handling and testing.
Java Backend Interview Questions and Answers (with Examples)
The most common Java backend interview questions — Spring, JPA, concurrency, microservices and system design — with detailed answers.
Circuit Breaker in Spring Boot with Resilience4j — Protect Your System from Overload
Stop cascading failures in microservices. Add a Resilience4j circuit breaker to any Spring Boot call in under 10 minutes.
Spring Boot Retry + Circuit Breaker with Resilience4j
Combine retry and circuit breaker correctly so transient failures recover automatically without amplifying outages.
Spring Cloud Gateway — Routing, Filters and Auth in One Place
Build a production API gateway with Spring Cloud Gateway: routing, JWT auth, rate limiting and request logging.
Spring Cloud Gateway with WebFlux — A Reactive Approach
Why Spring Cloud Gateway is built on WebFlux, what that means for your filters, and how to write fully reactive gateway code.
Kafka & ZooKeeper Docker Setup — Quick Deploy Guide
Spin up a local Kafka cluster with ZooKeeper in 60 seconds using docker-compose, ready for Spring Boot integration.
Spring Boot + Kafka — Build a Real-Time Messaging System
Produce and consume Kafka messages from Spring Boot with proper serialization, error handling and consumer groups.
Spring Boot + Redis Caching — Make Your API 10× Faster
Cache hot reads with Redis and Spring's @Cacheable in minutes. Includes TTLs, eviction and key design tips.
Spring Data JPA — 10 Best Practices for Production
Avoid N+1, lazy loading traps, and slow startup. The 10 JPA practices that separate hobby apps from production systems.
Spring Security + JWT — Stateless Auth Done Right
A practical, modern Spring Security 6 setup: JWT validation, stateless sessions, and method-level authorization.
A Pragmatic Spring Boot Testing Strategy
What to unit-test, what to slice-test, and when to spin up Testcontainers. A pyramid you can actually maintain.
Deploy Spring Boot to Kubernetes with a Helm Chart
Package a Spring Boot service as a reusable Helm chart with values for env, replicas, probes and HPA.
Deploy Spring Boot to AWS ECS Fargate — End to End
Containerize a Spring Boot service and ship it to AWS ECS Fargate behind an Application Load Balancer.