Aethos · About · by STK Engineering The team behind the platform · 2026

Consultants who deliver.

STK Engineering is an Austrian consultancy for enterprise software and AI. We embed in your teams, co-build on your infrastructure, and operate what we deliver — sovereign by design, productive from day one.

Get in touch How we work

I · THE FIRM STK Engineering

The firm behind
Aethos.

Three companies, one conviction: technology belongs on your infrastructure, under your control. STK Engineering began as an enterprise software consultancy in Vienna in 2012, expanded into immersive technology from Belgrade, and now delivers sovereign AI from Athens. Aethos is where all three disciplines converge.

Founded by Kristijan Stojanović, who has worked in enterprise software since 1998 — first as an independent consultant from 2001, then as STK engineering GmbH from 2012. Over two decades of building production systems for banks, insurers and public-sector organisations shaped the conviction behind Aethos: sovereign AI, delivered by people who stay until it runs.

STK Engineering GmbH (Austria), STK Engineering d.o.o. (Serbia) and STK Engineering Μονοπρόσωπη Α.Ε. (Greece) are separate legal entities under common ownership, operating under the STK Engineering brand.

STK engineering GmbH

Founded: 2012
Location: Vienna, Austria
Profile: Enterprise Software Development · On-Premise
Mode: Embed · Co-Build · Operate

STK engineering d.o.o.

Founded: 2013
Location: Belgrade, Serbia
Profile: Immersive Technology
Mode: Build · Operate · Hand over

STK Engineering Μονοπρόσωπη Α.Ε.

Founded: 2026
Location: Chalandri, Greece
Profile: Enterprise AI
Mode: Consult · Implement · Transfer

II · HOW WE WORK Methodology

Every engagement proves itself
before it scales.

We recommend a staged entry. Each stage is valuable on its own and decides on the next. No long-term commitment required until you have seen results.

Stage 01

Architecture Workshop

1 day · on site

We map your priority use cases, survey the existing data landscape and design the target architecture.

Use-case mapping
Data & compliance audit
Feasibility assessment
Roadmap draft

Stage 02

Proof of Concept

6 weeks · sandbox

One priority use case, running in your test environment with real data, clear success metrics and clean handover.

Local model deployment
RAG across your data sources
User-acceptance measurement
Handover documentation

Stage 03

Pilot Operation

3–6 months · production

Productive pilot with real users, full telemetry, tuning cycles and documented handover to your internal teams.

SLA & monitoring
Skill and model tuning
Training of your teams
Scaling plan

III · REFERENCE Proof in front of an audience

Twice gold.
On stage.

BEA World Festival II × Gold 2024
Best Event Awards · International Jury

Aethos avatars hosted the Austrian Tourism Day 2024 as live co-hosts on the polySTAGE at the Austria Center Vienna — immersive, multilingual, in front of an industry audience. Recognised by the international jury of the Best Event Awards in two gold categories.

Award: 2× Gold · BEA World 2024
Stage: polySTAGE · Austria Center Vienna
Occasion: Austrian Tourism Day 2024
Role: AI avatars as live co-hosts