Huy's Wiki

The amount of free, world-class engineering education available in 2026 is absurd.

Properties1
tagssocial, linkedin, ai

2 min read

The amount of free, world-class engineering education available in 2026 is absurd.

@alexandre-zajac · LinkedIn post · alexandre-zajac_the-… original · 2026-07-02

Post

The amount of free, world-class engineering education available in 2026 is absurd.

I bookmarked 16 resources that genuinely feel like they should cost money.

They don’t. Here’s the list:

my system design cheatsheet: https://lnkd.in/g7BEtcNZ

  1. 𝗠𝗜𝗧 𝗢𝗽𝗲𝗻𝗖𝗼𝘂𝗿𝘀𝗲𝗪𝗮𝗿𝗲 1,250+ full CS courses. Lectures, homework, exams. Free. → ocw.mit.edu

  2. 𝗛𝗮𝗿𝘃𝗮𝗿𝗱 𝗖𝗦𝟱𝟬 25 hours teaching you CS from scratch. The best intro course ever made. → cs50.harvard.edu

  3. 𝗠𝗮𝗿𝘁𝗶𝗻 𝗞𝗹𝗲𝗽𝗽𝗺𝗮𝗻𝗻’𝘀 𝗗𝗶𝘀𝘁𝗿𝗶𝗯𝘂𝘁𝗲𝗱 𝗦𝘆𝘀𝘁𝗲𝗺𝘀 𝗟𝗲𝗰𝘁𝘂𝗿𝗲𝘀 The author of “Designing Data-Intensive Applications” teaching you consensus, replication, and CRDTs for free. → https://lnkd.in/gbQhxS_d

  4. 𝗚𝗼𝗼𝗴𝗹𝗲’𝘀 𝗦𝗥𝗘 𝗕𝗼𝗼𝗸𝘀 (𝗮𝗹𝗹 𝟯) How Google runs prod. Site Reliability Engineering + The Workbook + Building Secure & Reliable Systems. → sre.google/books

  5. 𝗦𝘁𝗿𝗶𝗽𝗲’𝘀 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗕𝗹𝗼𝗴 The best writing on API design, payments infrastructure, and canonical log lines on the internet. → https://lnkd.in/dTH7xksh

  6. 𝗡𝗲𝘁𝗳𝗹𝗶𝘅 𝗧𝗲𝗰𝗵 𝗕𝗹𝗼𝗴 All architecture decision behind a system serving 260M+ users. Chaos engineering, microservices, CDN routing, all documented. → netflixtechblog.com

  7. 𝗖𝗹𝗼𝘂𝗱𝗳𝗹𝗮𝗿𝗲 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗖𝗲𝗻𝘁𝗲𝗿 DNS, CDNs, DDoS, SSL; explained like you’re a human, not a robot. → cloudflare.com/learning

  8. 𝗧𝗵𝗲 𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 𝗣𝗿𝗶𝗺𝗲𝗿 The most community-validated resource for learning system design from scratch (335k stars). → https://lnkd.in/dkPScaCW

  9. 𝗕𝘆𝘁𝗲𝗕𝘆𝘁𝗲𝗚𝗼 𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 𝟭𝟬𝟭 Visual, animated breakdowns of sharding, load balancing, CAP theorem, and more! → https://lnkd.in/d5itZHgQ

  10. 𝗣𝗼𝘀𝘁𝗴𝗿𝗲𝗦𝗤𝗟 𝗗𝗼𝗰𝘂𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻 It’s a masterclass in database internals, query optimization, and data modeling. → postgresql.org/docs

  11. 𝗡𝗮𝗻𝗱𝟮𝗧𝗲𝘁𝗿𝗶𝘀 Build a complete computer from a NAND gate. Seriously. Logic gates → CPU → assembler → compiler → OS. → nand2tetris.org

  12. 𝗚𝗿𝗲𝗮𝘁𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 The best platform to learn frontend deeply from all angles, especially for coding interviews. → greatfrontend.com

  13. 𝗦𝘁𝗮𝗻𝗳𝗼𝗿𝗱’𝘀 𝗔𝗹𝗴𝗼𝗿𝗶𝘁𝗵𝗺𝘀 𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻 Divide-and-conquer, graph algorithms, and NP. The same material Stanford CS majors get. → https://lnkd.in/g9SVTxBF

  14. 𝗙𝗶𝗴𝗺𝗮’𝘀 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗕𝗹𝗼𝗴 Peak performance engineering writing online. WebAssembly to web masterclass → figma.com/blog/engineering

  15. 𝗿𝗼𝗮𝗱𝗺𝗮𝗽.𝘀𝗵 Visual roadmaps showing exactly what to learn and in what order for frontend, backend, DevOps, more! → roadmap.sh

  16. 𝗛𝗲𝗹𝗹𝗼𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 You can’t match this resource when it comes to system design preparation for interviews. → hellointerview.com

The gap between a $200K degree and free online resources has never been smaller.

The only cost is time and discipline.

What’s the best free resource you’ve ever found?

Graph View

Backlinks