About CodeSpy

We explain AI and backend engineering the way we wish it was explained to us.

CodeSpy is a learning site for developers. Beginner-friendly AI playbooks, Spring AI tutorials, system design breakdowns and full projects, with real code and no fluff.

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40Published guides

AI Playbooks 18

Spring AI 9

System Design 9

Projects 4

Why CodeSpy exists

Clarity over cleverness

Real systems, not toy examples

Every architecture is one you could actually ship, with the trade-offs left in.

Clear steps for beginners

Plain words, small steps and a "you are done when" check, so nobody gets lost.

Code you can actually run

Spring Boot, Python, Redis, Docker. Snippets are tested, not decorative.

What we cover

Four tracks, one goal: ship real things

AI PlaybooksLLMs, agents, evals and guardrails explained from zero. 18 guides → Spring AIBuild RAG apps, MCP servers and agents in Java. 9 guides → System DesignInterview-ready designs with clear trade-offs. 9 guides → ProjectsEnd-to-end builds you can add to your portfolio. 4 guides →

Who's behind this

Two engineers, writing what we wish we'd had

Prashant Pandey

Founder & Editor-in-Chief

Leads editorial strategy, Spring AI and distributed-systems content. Obsessed with explaining hard things simply.

Spring AIDistributed systemsAI Playbooks

LinkedIn profile of Prashant Pandey

Ashmita Basu

Co-founder & Content Creator

Leads system design coverage, turning whiteboard-scale problems into guides anyone can follow.

System DesignInterviews