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JavaScript Mastery
@javascriptmastery Channel on YouTube Croatia
Runs paid posts. Estimate $2,000 to $3,950 for one integrated mid-roll.
Open on YouTube Checks out How to reach them
average views a post 180,396 Averaged across 6 posts, from YouTube's own API. Read Sep 4, 2026. Latest post 62,098 views, Aug 21, 2026
subscribers 1,270,000 From YouTube's own API. Read Sep 4, 2026.
posts every 21 days across 6 recent posts
last posted 16d ago Read Sep 4, 2026.
Recent post performance
Views on their last 6 posts
Average views180K
ViewsAverage
May 15, 2026 to Aug 21, 2026. Oldest to newest.
View post data6 posts
| Post | Date | Views | Promotion flag |
|---|---|---|---|
| How to Actually Build Mobile Apps with AI in 2026 | A Complete Beginner's Tutorial | 509,596 | Not flagged | |
| How Senior Engineers Actually Build with AI in 2026 | Build a Full Stack Job Applications Platform | 179,063 | Not flagged | |
| NestJS Full Course for Beginners in 2026 | Build a Production-Ready API | 118,098 | Not flagged | |
| Learn AI Engineering in 2026 | Build a Full Stack AI Websites with Agents | 145,622 | Not flagged | |
| Race 60+ Free Open Source LLMs | Build and Deploy the App Yourself | 67,896 | Not flagged | |
| Build and Deploy a Full Stack Learning Platform | Search Any Video, Jump to the Exact Second | 62,098 | Not flagged |
Can you sponsor them?
They run paid posts. 2 of 20 recent videos carry YouTube's paid-promotion flag.
Estimate $2,000 to $3,950 for one integrated mid-roll
Ask them directly 131,860 median views x $15 to $30 per 1,000 views (Influencer Marketing Hub, 31 Aug 2026). Benchmark: Influencer Marketing Hub, YouTube influencer rates ↗. This is our arithmetic on a published benchmark, not a quote from the creator.
What we checked
20 checks, 18 passed, 1 to review
| ✓ | Metrics came from the platform | Every audience figure here is a value YouTube's own API returned, never estimated or inferred. The price estimate is the one number we work out ourselves, and it is labelled and shows its arithmetic. | not published |
| ✓ | Enough recent posts to judge | 6 recent posts sampled (target 6). | not published |
| ✓ | Average views ≥ 20,000 | 180,396 average views, median 131,860, across 6 posts. | required |
| ✓ | Typical post also clears 20,000 | Median views 131,860 and outlier-trimmed mean 127,670 both clear the floor. A sponsored post should land in that range. | integrity |
| ✓ | Tech / dev / software engineering | 15 distinct dev signals in the bio and post text: javascript, react, next.js, backend, full stack, webdev. | required |
| ✓ | Not a gaming channel | YouTube's own category for the sampled posts: Education. | required |
| ✓ | Not a hardware / gear channel | No hardware/gear pattern. | preference |
| ✓ | Target region (US / UK / EU / AU / NZ / SG) | Croatia (EU), from the platform's own country field. | required |
| ✓ | Like rate ≥ 0.5% of views | 1.56% like rate, 0.147% comment rate, averaged per post. | integrity |
| ✓ | Average is not one viral outlier (YouTube limit 11×) | Top post is 3.9× the median, within the normal spread for YouTube, so the average reflects repeatable performance. | integrity |
| ✓ | Comment volume matches the view counts | Median 197 comments against 2,249 median likes: a normal ratio. | integrity |
| ✓ | views plausible for the subscribers count | 180,396 average views against 1,270,000 subscribers (14%). | integrity |
| ✓ | Posted recently | Last post 17 day(s) ago. | preference |
| ✓ | Publishes on a regular schedule | Median 20.9 day(s) between posts; the 6 sampled posts span 98 days. | preference |
| ✓ | Sampled posts are recent enough to compare | The 6 sampled posts span 98 days, close enough together that their views counts are comparable. | integrity |
| ✓ | Same numbers from two endpoints of the same API | 10 post(s) appeared in both the YouTube search index and the profile feed. View counts agree to within 0.0%. | integrity |
| ! | Verified against the platform's own published feed | No sampled video appeared in YouTube's official RSS feed (it only carries the last ~15 uploads), so the figures stand on a single source. | not published |
| ✓ | An independent creator, not a company's own channel | Nothing marks this as a company-run channel: it is not a known company account, the name carries no corporate designation, and the bio is not written in a company's voice. | required |
| – | Same person confirmed on other platforms | No other public profile was linked from this account, so this record covers one platform only. | not published |
| ✓ | Runs paid promotions (platform-declared) | 2 of 20 recent videos carry YouTube's paid-promotion flag. | not published |
Also on
| platform | handle | audience | views a post |
| X | @jsmasterypro | 42.4K | 34.5K |
| GitHub | @adrianhajdin | 37.4K |