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The Backend Chronicles

Mastering the art of server-side engineering. Deep dives into system design, databases, and scalable architecture.

Latest Articles

How We Decide What Ships on Masteringbackend
Life at MasteringBackend
15 min read

How We Decide What Ships on Masteringbackend

We get more feature ideas than we can build, so we wrote down 6 standards and check everything against them before it ships. This post walks through all 6, with a real example of each and the cost of keeping it.

SO

Solomon Eseme

8/18/2026

How to Become an AI Engineer as a Backend Developer
AI
13 min read

How to Become an AI Engineer as a Backend Developer

AI engineering is production systems work, not machine learning research. Backend engineers are closer to this role than data scientists are, because the job is mostly APIs, retrieval, cost control, and reliability. Here is what it takes and a realistic 90-day path.

SO

Solomon Eseme

8/18/2026

Is AI Engineering the Next Big Thing? Here's What You Need to Know
AI
5 min read

Is AI Engineering the Next Big Thing? Here's What You Need to Know

In this guide, you’re going to find out what an AI engineer does, building AI-Enabled Backend Systems, working With RAG and Vector Databases, developing AI Agents and Agentic Systems, how to control Models in Production, and the Skills Behind the Role.

TO

Toluwanimi Fawole

8/14/2026

Backend Interview Questions: 40 Real Questions With Answers
Backend
17 min read

Backend Interview Questions: 40 Real Questions With Answers

40 real backend interview questions with answers, grouped by topic, plus a note on what the interviewer is actually testing with each one. Covers core concepts, databases, API and system design, security, and behavioural rounds.

SO

Solomon Eseme

9/6/2026

Working with Files in Python (Read, Write & Organize Files)
Python

Working with Files in Python (Read, Write & Organize Files)

Whether you're reading configuration files, writing reports, processing datasets, or organizing directories, efficient file handling helps your programs work with real-world data.

TO

Toluwanimi Fawole

8/7/2026

What Is System Architecture? System Design vs System Architecture Explained
Backend
10 min read

What Is System Architecture? System Design vs System Architecture Explained

System architecture is the high-level structure of a software system. System design turns that structure into something buildable. This guide defines both, shows where they separate, and covers the decisions each one is responsible for.

TO

Toluwanimi Fawole

8/17/2026

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 8.2: Custom OAuth2UserService and Persisting Users in the Database
Backend

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 8.2: Custom OAuth2UserService and Persisting Users in the Database

After a user successfully authenticates with Google, Spring Security retrieves the user's profile information.

AY

Ayush Shrivastava

7/31/2026

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 8.1: Configuring Google OAuth2 Login in Spring Boot
Backend

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 8.1: Configuring Google OAuth2 Login in Spring Boot

Google acts as the Authorization Server, while your Spring Boot application acts as the OAuth2 Client.

AY

Ayush Shrivastava

7/30/2026

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 8: OAuth2 Login, Social Authentication, and OpenID Connect
Backend

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 8: OAuth2 Login, Social Authentication, and OpenID Connect

Spring Security provides built-in support for OAuth2 and OpenID Connect (OIDC), making it straightforward to integrate third-party identity providers into Spring Boot applications.

AY

Ayush Shrivastava

7/29/2026

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 7: JWT Authentication and Authorization for Secure REST APIs
Backend

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 7: JWT Authentication and Authorization for Secure REST APIs

In this article, we will build a complete JWT-based authentication system using Spring Security 7, Spring Boot 4, and Java 21.

AY

Ayush Shrivastava

7/27/2026

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 6: Method-Level Security with @PreAuthorize, @PostAuthorize, and @Secured
Backend

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 6: Method-Level Security with @PreAuthorize, @PostAuthorize, and @Secured

In this article, we will learn how to implement method-level security in Spring Security 7 using Spring Boot 4 and Java 21.

AY

Ayush Shrivastava

7/21/2026

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 5: Roles vs Authorities Explained
Backend Projects

Mastering Spring Security 7 with Spring Boot 4 and Java 21 – Part 5: Roles vs Authorities Explained

In this article, we will explore role-based and authority-based authorization in Spring Security 7, understand their differences, and implement production-ready access control for REST APIs.

AY

Ayush Shrivastava

7/20/2026

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