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Kazimi
Cryptographic proof that an app's data came from a human
Last verified August 24, 2026 · Updated daily
What Kazimi is building
Kazimi is a security layer that lets a mobile app prove its own telemetry is real. The integration is deliberately small: a developer drops the Kazimi library into the app, the library encrypts signals about the device's execution environment, and the developer decrypts the verdict through an API. What comes back is not a risk score handed down by a third party but a statement about the developer's own first-party data. The detection surface is the classic mobile-tampering set, applied to marketing signals rather than to logins: device emulation, rooted and jailbroken devices, repackaged or tampered builds, code injection, and replay attacks. The company's framing on its own site is that fraudulent signals do not just cost media budget, they poison the downstream systems: bots get treated as high-value users, LiveOps KPIs drift, and user-acquisition spend is allocated against a fiction. The cryptographic choice is the interesting part. Kazimi uses privacy-preserving proofs to establish signal origin and quality without collecting personal data and without asking the user for a permission prompt. That is a specific bet about the post-IDFA world: attribution has already migrated to first-party signals, and nobody has been verifying those signals. The product is platform-agnostic by design, sitting alongside existing MMPs and analytics stacks including Firebase rather than trying to replace them. The named customer shape is mobile gaming studios, rewards platforms, and fintech apps, which is exactly the set of apps where a bot has a direct financial incentive to look like a person.
Why this matters
The founding team built fraud detection at Adjust, the Berlin mobile analytics company AppLovin acquired for roughly $1 billion in 2021. That is not a credential flourish; it is the reason the product exists in this shape. Andreas Naumann ran Adjust's anti-fraud team and drove its bot-detection expansion through the Unbotify acquisition, and his stated principle then was to catch fraudulent activity before attribution takes place rather than reconciling it afterward. Kazimi is that principle rebuilt as infrastructure the developer owns. On timing, the coverage of the round cites a global mobile advertising market of about $419 billion a year and notes that bot traffic is projected to exceed human internet traffic for the first time in 2026. Take the second number as directional rather than gospel, but the direction is the whole argument: as more app signal gets pointed at AI systems and automated bidding, unverified telemetry stops being a media-buying nuisance and becomes corrupted training and optimisation data. The honest counter-argument is that MMPs and ad networks already sell fraud detection, and app teams are tired of buying it. Kazimi's answer is architectural rather than commercial: the verification happens inside the app the developer controls, cryptographically, before anyone else in the chain gets a chance to grade their own homework.
Open roles at Kazimi
2 positions we're tracking. Roles are re-checked daily and removed when filled.
Know when Kazimi is hiring before anyone else
A role stays uncontested for about four days. Here's the window — and where we put you in it.
From $9/month, cancel any time.
Watching Kazimi
0 applicantsRole spotted & verified
1You get the alert
1You've applied
~8Hits the job boards
250+Hiring outlook
Two engineering roles are live on Kazimi's own Greenhouse board right now, both in Berlin, both posted around the funding announcement. The company describes itself there as building 'a new generation of security infrastructure for mobile apps'. This is explicit, current, and small enough that each hire is a real decision.
Working at Kazimi
Kazimi: Cryptographic proof that an app's data came from a human. Founded , currently employees. What this means for you: opportunity to shape your role based on the company stage.
Most Kazimi jobs are based in Berlin, Germany.
How to actually get hired at Kazimi
Why applying the normal way doesn't work
Kazimi uses an ATS, but referrals still come first. Cold applications aren't ignored — they're just behind referrals, sourced candidates, and recruiter picks.
Who to contact at Kazimi
What to show them
Take any open-source Android app, instrument it with a small attestation shim, and run it under a stock emulator, a rooted device, and a Frida-hooked build. Publish a short write-up of which environment signals survive each case, what a replay attack looks like against your own endpoint, and what your latency cost was for the crypto on cold start. Kazimi advertises ultra-fast initialisation and low latency, so a real number for init overhead on a mid-tier device is the single most useful thing you can hand them.
A cold email that works at Kazimi
What Kazimi screens for
Look at the cap table shape rather than the headline. Market One Capital led, IBB Ventures came in, and then the angels are Rovio's former CTO, an ex-Supercell data scientist, and a CFO from Birkenstock and Sportradar. Those first two are the buyer: mobile gaming studios are precisely who bleeds money to bot traffic in rewarded and UA flows. A pre-seed whose angels are its customers is a company that already knows where the first ten logos come from, which is why the two Berlin engineering roles opened the same week the money did. The window is now and it is narrow. Four founders, two open engineering seats, a Greenhouse board with nothing else on it.
Don't send a generic CV to Kazimi. Mirror the job posting's language to get past automated screening.
Don't make these mistakes
Two separate traps. First, do not explain mobile ad fraud to this team. Andreas Naumann ran fraud prevention at Adjust from 2015 and led its bot-detection work; Ville Mikkola was hired by Adjust to head the Coalition Against Ad Fraud. A note that opens by describing SDK spoofing or click injection as an emerging problem reads as someone who found the category last week. Second, do not assume Chase is the technical founder and pitch him accordingly. He has a PhD in diplomatic history from Georgetown and ran global communications at Adjust before a stint as VP of Communications at btov Partners. Dropping 'zero-knowledge proofs' at him as a shibboleth is a misread; so is talking down. Write to him about what the company is trying to change in the market, and save the cryptography for August or Andreas.
Mistakes that kill Kazimi applications
At people, a copy-paste CV is immediately obvious. It's an instant no.
Nobody cares what you want. Start with The founding team built fraud detection at Adjust, the Berlin mobile analytics company AppLovin acquired for roughly $1 billion in 2021 and how you'd help.
Don't apply and wait. The median Tech application gets no response ever. One follow-up at day five roughly doubles reply rates.
Applying to Kazimi? Get the contact, not the form.
The Kazimi interview process
4 stages · 14 days typical · take-home: no · modelled from similar companies
We don't yet have verified candidate reports for Kazimi. What follows is the typical process for a -person Tech company — treat it as a model, not confirmed detail.
Interview stages
Recruiter Screen
Phone or video · 30 min
Basic qualification and logistics
Recruiter or HR
Hiring Manager Interview
Video call · 45 min
Role fit and experience deep-dive
Hiring manager
Technical/Functional Round
Video call · 60 min
Skills assessment and problem-solving
Team members
Final Round
In-person or video · 60 min
Culture fit and cross-functional alignment
Senior leadership
Kazimi interview timeline
At days, Kazimi's process is about average than typical for Tech (14 days at this size).
Interviewed at Kazimi?
Tell us how it went — stages, questions, timeline. Takes 90 seconds and it's how this page stays accurate for the next person.
Submit your Kazimi interview experience →Kazimi jobs, frequently asked questions
How many jobs does Kazimi have open?
Kazimi currently has 2 open roles, last verified August 2026.
Does Kazimi hire remotely?
All current Kazimi roles are based in Berlin, Germany.
What roles is Kazimi hiring for?
Kazimi is hiring across Engineering. The most recent opening is Full-stack Engineer (Berlin).
How do I apply for a job at Kazimi?
Apply directly through the links above, or read our guide on how to actually get hired at Kazimi.
Does Kazimi respond to cold emails?
We're still collecting cold email data for Kazimi.
Who is the hiring manager at Kazimi?
At this size, hiring is usually run by the hiring manager.
How competitive is it to get hired at Kazimi?
-person Tech companies see ~100-250 applicants per role in two weeks. The 72-hour window is your advantage.
How many rounds is the Kazimi interview?
4 stages: Recruiter Screen, Hiring Manager Interview, Technical/Functional Round, Final Round.
Is the Kazimi interview hard?
It concentrates on relevant experience and culture fit rather than abstract puzzles. The stage candidates find hardest is Final Round.
Does Kazimi give a take-home task?
No, Kazimi does not include a take-home stage.
How long does Kazimi take to get back to you?
Around 14 days across the full process.
What should I prepare for the Kazimi interview?
Study relevant experience and culture fit. At this size (), they care about self-sufficiency over textbook knowledge.
Where is Kazimi based?
Kazimi is headquartered in Berlin, Germany.
Get Kazimi roles before they're posted
A role stays uncontested for about four days. Here's the window — and where we put you in it.
From $9/month, cancel any time.
Watching Kazimi
0 applicantsRole spotted & verified
1You get the alert
1You've applied
~8Hits the job boards
250+