Interview PrepSenior software engineer study guides

Java, Spring, concurrency, distributed systems, databases, DevOps, AWS, DSA, and behavioral — all the teaching layer in one place.

Prep Index →

Start with Core Java

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Core Java

JVM internals, modern language features through Java 25, and the gotchas that come up in every senior interview.

Study Core Java

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Spring

Spring Boot 3+, DI, AOP, Spring Data, Kafka/JMS integration, and the testing patterns that matter.

Study Spring

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Concurrency

Memory model, locks, executors, virtual threads, and the subtle bugs that separate senior candidates.

Study Concurrency

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Data Structures & Algorithms

First-principles complexity analysis, every core structure, and the pattern toolkit for LeetCode-style problems.

Study DSA

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Databases

Postgres, MongoDB, DynamoDB, distributed-DB theory, caching, OLAP, and JPA/Spring Data.

Study Databases

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Distributed Systems

Messaging, microservices, consistency models, and whiteboard-ready system-design patterns.

Study Distributed Systems

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DevOps

GitOps, Kubernetes, Helm, ArgoCD, CI/CD, and infrastructure ownership for backend engineers.

Study DevOps

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AWS

Every AWS service and pattern a senior backend/DevOps engineer is expected to reason about — no ML fluff.

Study AWS

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Behavioral

STAR-format hero stories, senior-level signals, and the mechanics of the non-technical screen.

Study Behavioral

About this site

A study stack for senior software engineer interviews — Java/Spring backend focus, with the adjacent skill areas (distributed systems, databases, DevOps, AWS, DSA, behavioral) treated with the same depth.

Each guide is a teaching document, not a cheat sheet: concepts from first principles, runnable code, gotchas, and interviewer-style Q&A. Every page has an on-this-page outline on the right, and Ctrl / Cmd + K opens full-text search across everything.

Start with the Prep Index if you want the master question bank, or dive into any guide above.