Krasimir Tsonev - Engineer, Blogger and Speaker

29/01/2026

🚨 Finally! The big day has come. I’m holding a printed version of my fifth book in my hands 📖✨ I’ve been secretly working on this book for the last two years. It has been on and off. But during the last holidays I wrapped it up. Meet “Pocket Guide to Seniority”. A small book packed with my thoughts, lessons, mistakes, and tips on becoming a senior engineer.

In May 2024 I was on a train from Prague to Vienna after my first WebExpo Conference. That’s when the “crazy” idea came to mind. Why not write a book based on the talk? I’ve been collecting tips on seniority for years anyway. So I started shaping the chapters shortly after that. I know that in the era of AI no one reads books anymore. But I still wanted to give it a try.

The book is not very long. Around 60 pages. Designed to be read in a weekend. Or a long flight. Or while pretending to listen in a meeting.

You can get your copy here: https://seniority.krasimirtsonev.com/
Printed version from Amazon and PDF version from Gumroad.

I truly hope you’ll enjoy it.

P.S. Check out the link in the comments for my WebExpo presentation that inspired the book!

P.S.S. If you are wondering what's inside - here's the table of contents:
1. Communication is the skill of the future
2. Seeing the Whole Picture: From Task Taker to Problem Solver
3. Ownership: Carrying the Ball All the Way
4. Ego Management
5. Failure as a Feature, Not a Bug
6. A good cook cleans
7. Simplicity Is King: Pragmatism Over Cleverness
8. Fundamentals Beat Frameworks
9. Multiply Yourself: Teaching as a Superpower
10. Curiosity, Breadth, and Open-Mindedness
11. Consistency Beats Intensity
12. Disagree and Commit
13. Make Decisions with Incomplete Information
14. Design for the Team, Not for Yourself
15. Influence Without Authority
16. Read the room, not just the code
17. Make Work Visible
18. Negotiate Trade-offs, Not Absolutes
19. Pace Yourself for the Long Game
20. Build Your Reputation Brick by Brick

25/11/2025

👋 Как е, мрежа? Един от проектите, които позанемарих (със самочувствие и лека вина), днес има рожден ден 🍰🎉.
И за да не празнувам сам, пускам всички курсове в Daskalo.Dev на 50% отстъпка. Промо код: BIRTHDAY2025.

Daskalo.Dev винаги е бил замислен като място за истинските основи - нещата, които не се променят на всеки framework release и които изграждат стабилни умения за години напред.

В момента вътре има три курса:

⭐ „Основи на уеб програмирането“
6 модула · 46 видео урока · 8+ часа съдържание · въпросници · практически задачи
👉 https://daskalo.dev/courses/web-fundamentals

⭐ „Основи на React.js“
5 модула · 23 видео урока · 3+ часа съдържание · въпросници · практически задачи
👉 https://daskalo.dev/courses/react

⭐ „Говориш ли JavaScript?“ (на английски)
4 модула · 24 видео урока · ~3 часа видео · въпросници · практически задачи
👉 https://daskalo.dev/courses/do-you-speak-javascript

Благодаря на всички, които подкрепят проекта ❤️
Ако някога сте искали да започнете или да надградите уменията си — точно сега е моментът. 🚀

25/10/2024

Hey folks👋 As part of this years DevCon 2024 | 6-7 November, Bucharest I'll be also leading a master class on "Building scalable front-end architecture". I'm preparing some interesting topics so if you are around I'll be happy to see you there. Here's the full list of speakers and activities for both days 👉 https://www.dev-con.ro

17/10/2024

✨🫵 Hey everyone, I'm excited to share that I'll be part of WebExpo Conference again!. Mark the dates 28-30 May 2025. I think I said this before - that's a conference that you don't wanna miss. I know you like visiting so why not doing it at the end of May. The lineup of speakers is growing up quickly and I see some high quality presentations on the list. Also today the event has its 16th birthday 🤩. 16 years! It's insane, isn't it. The team prepared a nice blog post covering this significant moment here https://webexpo.net/blog/a-webexpo-walk-down-memory-lane/ and also provides a discount code with 16% off - SWEET16. But hurry, this offer ends this Friday ⏰ -> https://webexpo.net

02/10/2024

ecosystem is kinda settled down last couple of years. There ARE still many options but at least we have big winners and we (it seems) have picked our tools. There is something interesting coming up on the horizon - VoidZero. It's a new toolchain by the creator of Vue hosting the core contributers of Vite, Vitest, Rolldown and Oxc. I hope it wont have the destiny of Rome project. Here's the announcement 👉

We are building the next generation of JavaScript tooling

30/09/2024

Reminder that the programming is cool but you have to move you ass from time to time 🏃

11/09/2024

Another interesting documentary by Honeypot - Deno is probably the next generation JavaScript runtime. https://www.youtube.com/watch?v=zxitJn9MwYs It worth watching the video but also following the platform. I'm not saying "the project" because it's a full full-fledged system.

After your enthusiastic feedback on our Node.js documentary, we’re excited to present a special feature on Deno! Created by Ryan Dahl and Bert Belder, the in...

09/09/2024

Here's some to start your week with - the recordings from this year's CascadiaJS - https://www.youtube.com/watch?v=CtLbO0UCYLc&list=PLLiioAbFTbKPi9SkDhtppEGDPI31GGZyj

CascadiaJS is a annual conference happening in Seattle, WA. Its first edition was back in 2012.

10/08/2024

I'm preparing a new talk and I needed some icons/svgs. I found https://www.svgrepo.com/ which seemed like an awesome resource.

P.S.
Check the license before using it. It will probably fit to your needs but just in case.

Free Vectors and Icons in SVG format. ✅ Download free mono or multi color vectors for commercial use. Search in 500.000+ Free SVG Vectors and Icons.

17/07/2024

Rodrigo is famous with his unique ways of showing/teaching code. Here's another interesting example of how reading an article may be quite interactive experience

Flexible content, richer presentation