Built by engineers.
Read by engineers.
CodeSpy is a technical blog that makes backend engineering, system design, and AI concepts genuinely understandable — without dumbing them down.
I started CodeSpy because I was tired of technical content that either oversimplified everything or assumed you already knew it all. This is what I wish existed when I was learning.
Connect on LinkedIn →Everything a backend engineer needs to level up
From your first Spring Boot project to system design interview prep — we cover the full journey.
System Design
Deep dives into scalability, reliability, networking, and distributed systems — with real-world examples and diagrams, not just theory.
Spring AI
Practical guides on integrating AI into Spring Boot apps — function calling, structured outputs, multimodality, and production patterns.
Projects & Tutorials
Full-stack project walkthroughs using Spring Boot, Angular, microservices, and Docker — built the way real production projects are.
Interview Prep
System design interview guides written by engineers who’ve been through the process — OSI model, TCP/IP, IP addressing, and beyond.
The people behind CodeSpy
Not a content farm. Not AI-generated. Real engineers writing what they know.
Prashant founded CodeSpy in 2022 with a clear mission: make backend engineering and system design genuinely accessible. He leads editorial strategy, writes on Spring AI and distributed systems, and reviews every article before it goes live.
Ashmita co-founded CodeSpy and drives its System Design content — breaking down complex architectural concepts, from payment processing systems to distributed databases, into articles that are rigorous, practical, and interview-ready.
How we think about content
Practitioner-first
Every article is written by someone who has actually built the thing. No recycled docs, no paraphrased Wikipedia.
Clarity over cleverness
If a junior developer can’t follow it, the article isn’t ready. Simple language, real examples, no jargon for its own sake.
Depth that’s actually useful
We don’t do 300-word overviews. If a topic is worth covering, we cover it properly — with diagrams, examples, and code.
Want to write for CodeSpy?
We’re always looking for engineers who want to share what they’ve built and learned. No marketing fluff — just real technical content.