We build, audit and run ad tech.
Ad servers, Prebid bidders and integrations. Contextual, cookieless and TTPA-ready. We're the engineering team behind Engerio, working with publishers, SSPs and ad platforms.
From our work on Engerio
How a Prebid bid is won(illustrative prices)
Publisher page loads
Prebid.js asks every bidder for a price
Engerio answers in ~100 ms
Ad server picks a campaign by context and dynamic CPM
- engeriowins€1.42 CPM
- bidder B€1.18 CPM
- bidder C€0.96 CPM
Ad renders, viewability is counted
Reporting for advertisers and publishers
- 100k
- requests / min at peak
- 120+
- media on our stack
- ~100 ms
- bid response time
- 4+ yrs
- in production
Numbers from Engerio, the ad stack we built and run.
Who we work with
Publishers
No timeouts, no lost revenue, an ad stack you understand.
SSPs & bidders
We maintain a listed Prebid bidder. Adapters that pass review and perform.
Ad platforms
Ad servers and decisioning, built and run for you.
Sounds familiar?
Where ad stacks usually hurt
Prebid is slowing pages down
Too many bidders, long timeouts and Core Web Vitals that keep slipping.
Revenue drop you can’t explain
GAM, Prebid analytics and SSP reports that nobody can understand.
The person who built it has left
A custom ad stack with no documentation and nobody to call when it breaks.
Regulation is catching up
TTPA, TCF and cookieless targeting need changes your stack wasn’t built for.
Your ad server is a black box
Nobody can say why an ad was (or wasn't) served.
A supply chain nobody checks
ads.txt, sellers.json and schain drift out of sync, and buyers quietly bid less.
Services
Start with an audit. Stay for as long as it makes sense.
01
Audit
A Prebid and ad stack audit: written report, prioritised fix list, walkthrough call.
Audit →02
Operations & takeover
We take over a running ad stack, stabilise it and run it in the cloud, with DevOps and scaling included.
Operations →03
Development
Ad servers, contextual engines, formats and integrations, custom-built for your stack.
Development →
Inside Engerio
The ad stack we built and run, piece by piece.
Click any component to see how it works.Tap any component to see how it works.
Select any component to see how we built it.
Each one links to its chapter in the Engerio case.
Core
Demand
Decisioning
Delivery
Runs on
Work
Ad tech and monetisation we've built
Engerio · Ad network
71.4%
reach for Engerio. A proprietary ad server and contextual engine, plus TTPA-ready political ads – all built and operated by us.
Read the case →iMeteo · In-app monetisation
1 month
Prebid with Google Ads and Adform in a Flutter app, plus a consent-or-pay subscription.
Read the case →Korkuma
Live shopping app: monetising live video through in-stream sales · iOS + Android
“Delivered on time, properly tested, great communication in every phase.”
— Filip Malýpetr, Korkuma
Why us
We run a production ad stack
We run Engerio 24/7
Our advice comes from a production ad stack we operate, not from slides.
Engineers on the call
You talk to the people who write the code.
Cookieless by design
Contextual targeting and zero user tracking, built in from the start.
Price known upfront
Every audit is quoted before we start. Median audit price is €1,200.
Prebid contributors
We authored and maintain Engerio's bidder adapter in the official Prebid.js repository, so we know Prebid from the SSP side too.
Our stack
- Prebid.js
- Google Ad Manager
- Equativ
- Adform
- AWS
- TCF v2.2
- TTPA
- Python
- React.js/Typescript
- Scrapy
- PostgreSQL
- Prebid-compatible bid server (Python)
- Cloudflare
- Grafana
- Celery
- Redis
Process
How working with us goes
Intro call
A short call with an engineer about your stack or your project.
Audit or discovery
We assess your existing stack or define the requirements for a new one.
Fixed proposal
Scope, price and timeline before any work starts.
Build & operate
We build, fix or take over, and keep it running.
FAQ
Before you book
How do you price work?
Audits are quoted upfront (median audit price €1,200); projects at a fixed price, agreed upfront; operations as a monthly retainer.
Do you take revenue share?
No. You pay for the work, not a cut of your yield.
Do you build new systems or only fix existing ones?
Both. Many clients start with an audit; new builds start with discovery.
Who will we talk to?
The engineers who do the work.
Do you sign an NDA?
Yes, before any access.
Where are you based?
Prague, Czech Republic (CET). We work with clients across Europe.
Talk to an engineer
Tell us what's going on with your ad stack. We reply within 24 hours.