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A free library of technical-interview material from CodeSignal: practice guidance, explanations of how coding assessments are scored, interview question breakdowns and hiring-process write-ups. Useful preparation if a company has sent you a timed coding assessment.
Why I recommend it: The resource library is free to read. Bear in mind CodeSignal sells assessment software to employers, so the writing naturally presents these tests as a fair measure of skill — read it for what it tells you about how the tests work and what they reward, which is useful when one lands in your inbox.
Newsletter breaking down system design and backend engineering concepts with clear diagrams — interview-grade explanations of how large systems work.
Why I recommend it: Use the diagrams as interview prep. If you can redraw one from memory and explain the tradeoffs out loud, you are ready to talk about it in a system design round.
Interview prep and career advice for developers from Fahim ul Haq, drawing on 15+ years in big tech.
In plain terms: A newsletter of coding interview prep and tech career advice from a longtime engineer and founder. Focused on interview patterns, system design, and growth in engineering roles.
From the site: Interview prep and career advice for devs. Tips and takeaways from 15+ years in tech.
Why I recommend it: Pair this with mock practice. The system design and interview breakdowns map closely to what big tech actually asks.
People of Color in Tech's walkthrough of a realistic coding-interview study plan — what to prioritize, how to schedule practice, and how to prepare for the behavioral rounds alongside the technical ones.
In plain terms: This guide explains how to build a structured study plan for coding interviews. Use it to break down job descriptions, prioritize your practice topics, and prepare for recruiter screens alongside technical rounds.
From the site: Unlocking the coding interview opens the door to top pay, benefits, and perks at premier tech companies.
Why I recommend it: The plan structure is the value here. Scattered LeetCode grinding is why most people plateau.
Coding interview practice organized by underlying concept rather than by topic list, so you learn the patterns that transfer across problems instead of memorizing individual questions.
In plain terms: This study tool helps you prepare for coding interviews by organizing practice problems by underlying concept. You can work through connected questions to learn problem-solving patterns rather than memorizing individual solutions.
From the site: PathPrep is a guided coding-interview study tool. Navigate a graph of LeetCode-style problems connected by the techniques that solve them, so concepts actually click.
Why I recommend it: Concept-first beats grinding a problem list. If you can name the pattern out loud, you can usually solve the variant they actually ask.
Slide deck of advice from working technology architects and engineers: how to open strong, when to ask clarifying questions, what depth is expected at junior vs. senior level, and how to talk through architecture, scaling, and performance.
In plain terms: This slide deck shares advice from working tech professionals on handling technical interviews. Use it to learn how to explain your coding process, tackle tough questions, and tailor your answers for junior or senior roles.
Why I recommend it: Lead with your strongest projects — interviewers dig into whatever you highlight.
