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Engineering Lab

Learn backend engineering by building real systems.

Structured paths for Java, Spring Boot, databases, DevOps, and AI-assisted development.

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Client–Server and HTTP Request Lifecycle

Backend Engineering · Level 2 · 35 min

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Learning paths

DevOps for Backend

Take a service from local code to a reachable, recoverable deployment.

DockerCI/CDNginxGit
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AI-Assisted Engineering

Use AI as a careful partner across research, implementation, and review.

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Hands-on practice

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intermediate · 45 min

Dockerize a Spring Boot App

Package a Spring Boot service into a small, production-ready image using a multi-stage build.

intermediate · 1 hr

Docker Compose: Next.js + Spring Boot + PostgreSQL

Run the whole stack — frontend, API, and database — with a single command and no manually installed services.

intermediate · 1 hr

Configure Nginx Reverse Proxy with HTTPS

Put Nginx in front of a Spring Boot app, terminate TLS with a free Let's Encrypt certificate, and force HTTPS.

intermediate · 1 hr

Set Up a GitHub Actions CI/CD Pipeline

Run tests on every pull request, and build + push a Docker image automatically on every merge to main.

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H-Phsar — B2B Marketplace API

A B2B online marketplace API connecting distributors and retailers — stores, product catalogs, carts, an order state machine, and real-time notifications. Spring Boot 3 on PostgreSQL.

Concepts demonstrated

Authentication · Order workflow · Data modeling · Real-time notifications

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Hengo — AI Companion for Daily Growth

An AI-powered Korean learning and growth platform for software engineers and international professionals working in Korea.

Concepts demonstrated

RLS-backed data · AI route design · Spaced-repetition logic · Mobile workspace UX

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Your progress

Backend 0/14 · DevOps 0/9

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