🤝
Make a deal with Jannis Harder
🔒 Paid proposals held safely in escrow — released only when the work's approved.
Followers
332
Account age
6 yrs
💰 Suggested sponsorship rate
$40 – $65 / sponsored post
Estimated from audience size & typical reach — every deal is negotiable and held in SocialDB escrow.
🎁 Free analysisfor Jannis Harder
📊 Post engagement
5
Avg engagement / post
1.5%
Engagement vs followers
Aug 2020
On Mastodon since
🔥 Top post: Is there any open source project that's successfully funding dev · 18 likes + reposts
📊 Activity & format
Posting cadence
0.09 / week
A lower-frequency account — each post lands with more weight.
Content mix
Mostly text
Recent: 12 text · 0 image · 0 video.
Follower / following
1.7×
Follows 197 back. A more reciprocal / networked account.
Recent posts
View on Mastodon ↗
slightly belated I-also-arrived-at-39c3 toot
Some day I will train my muscle memory to not accidentally delete the mention of the author of the post I'm replying to when rephrasing the first sentence of my response ... today is not the day.
I'm not even sure how that shows up for oth…
Keeping with the topic of compression, I just added one of the oldest projects on my site. The short lived mac os (32-bit x86, probably 10.5 only) 4k executable packer muncho I released in 2008 https://jix.one/muncho/.
I simply forgot abou…
Finally updated my website https://jix.one for the first time since 2021, mostly to replace some outdated info, but I've also started adding some projects I've been working on since.
So far I added https://jix.one/cnfpack/ a compressed fil…
just arrived at #37c3 and apparently I forgot how to navigate the CCH since the last time it was here ^^
I can finally put a decade of experience with rust on my CV https://github.com/rust-lang/rust/commit/525878fc96deb41bdc8f68daf5ba686688889d79 :D
(not sure if this was actually my first contact with rust, but the earliest thing I can find t…
arrived by now
Now on my way to #cccamp23 :)
On twitter, when I saw someone explaining a concept I had used in the past I'd often share it as a quote tweet, adding the context of where and how that had been useful to me.
Here I've started to reply and then would boost both the initia…
Now this is a cute proof technique I hadn't seen before: For positive \(A, B, C, D\) Lehman’s inequality states that \[ \frac{(A+B)(C+D)}{A+B+C+D} \geq \frac{AC}{A+C} + \frac{BD}{B+D}. \]
Lehman’s proof works by constructing a resistor net…
The last few weekends I've been working on my own rust implementation of a forest-of-B+-trees data structure, which is very useful for representing dynamic graphs, very similar to cranelift_bforest (https://docs.rs/cranelift-bforest/latest…
🐘 Community & instance
Home server
mathstodon.xyz
Their home server on the fediverse — the instance a creator picks signals the community they belong to.
✅ Link-verified
Verified link
Proved ownership of a website linked on their profile — Mastodon's green-check verification, a real identity signal rather than a paid badge.
On Mastodon since
Aug 2020
An OG fediverse account from Mastodon's early years — a long, established presence.
💡 Facts
🗓️Joined Mastodon in 2020 — 6 years ago.
👁️Averages 5 views per post.
📤Posts about 0.1× per week.
🕵️ Fake follower check
Estimated89/100
Excellent
Credibility score
99%
Real
Real audience
Low
Fake-follower risk
High
Data confidence
- Est. 99% real, active audience · Low fake-follower risk.
- Strong engagement (~1.5% of followers engage each post) — an active, real audience.
- Verified account.
- Established account (6+ years old).
Heuristic estimate from engagement, follower ratios, account age & growth — a screening signal, not a guarantee.
🔀 Audience overlap
EstimatedEstimated shared audience with similar creators — useful for avoiding overlap (or doubling down) when planning a campaign.
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Frequently asked questions
How much does Jannis Harder charge for a sponsorship?
Jannis Harder hasn't published fixed prices yet. Send a proposal through SocialDB and agree terms directly — your payment is held in escrow until the work is approved.
How do I contact Jannis Harder for a brand deal or collaboration?
Send a paid deal or collab request right here on SocialDB — we notify Jannis Harder, and once they accept, your payment is held safely in escrow and released when the work is approved. You don't need to track down an email.
How many followers does Jannis Harder have?
Jannis Harder has 332 followers on Mastodon.
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