"Architecture is the decisions that you wish you could get right early in a project." — Ralph Johnson

"The best architectures, requirements, and designs emerge from self-organizing teams." — Manifesto for Agile Software Development

"Complexity is the enemy of reliability." — Tony Hoare

Technology Stack

Backend

• Java 17

• Spring Boot 3.x

• Spring Security (JWT)

• Spring Data JPA

• MySQL 8.x

• Maven

• OpenAPI Generator

• Flyway

Frontend

• React

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🏗 Why I Chose This Tech Stack

1️⃣ Why Microservices Architecture?

Problem I’m Solving

• Strict ticket lifecycle enforcement

• SLA monitoring engine

• Role-based authorization

• Escalation logic

• Audit trail

• GitHub + Confluence integration

A monolith would:

• Become tightly coupled

• Make scaling SLA engine difficult

• Make deployments risky

• Create shared DB bottlenecks

Why Microservices Works Here

✔ Independent scaling (SLA engine vs Ticket service) ✔ Independent deployment ✔ Database per service → strong boundaries ✔ Clean domain isolation ✔ Real-world production alignment

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☕ Why Spring Boot + Java 17?

Why Spring Boot?

• Production-ready ecosystem

• Built-in security framework

• Mature JPA support

• Great microservice support

• OpenAPI integration

• Industry standard

Why Java 17?

• LTS release

• Improved performance

• Records (great for DTOs)

• Pattern matching

• Better memory handling

This makes the backend:

• Stable

• Maintainable

• Enterprise-ready

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⚛ Why React for Frontend?

Requirements

• Role-based UI rendering

• Lifecycle state transitions

• Real-time SLA indicators

• Audit view

• Dashboard metrics

React gives: ✔ Component-based UI ✔ Conditional rendering for roles ✔ Reusable ticket components ✔ API-driven design ✔ Easy integration with JWT

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🗄 Why MySQL ?

Golden Rule of Microservices:

“Each service owns its data.”

Why MySQL?

• ACID compliance

• Strong relational modeling

• Transaction safety for lifecycle transitions

• Index support for SLA checks

• Mature ecosystem

Per-service database ensures:

• Loose coupling

• No cross-service joins

• Data integrity boundaries

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🔐 Why JWT-Based Authentication?

System needs:

• Role-based access

• Stateless auth

• Gateway-level validation

• Scalable authentication

JWT gives: ✔ Stateless authentication ✔ Easy gateway validation ✔ Embedded roles ✔ Horizontal scaling ✔ Token-based microservice trust

Flow:

1. User logs in

2. Auth service issues JWT

3. Gateway validates token

4. Services trust request

Clean. Secure. Scalable.

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🔄 Why GitHub Integration?

✔ Documentation-as-code ✔ Versioned architecture ✔ Automated documentation publishing ✔ CI/CD automation ✔ Clean change tracking

This makes the system: Not just software — but an engineering product.

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