O2 Slovakia tech stack
O2 Slovakia builds mostly with Java, C#, Kotlin, SQL. Its stack also includes Power BI, Jetpack Compose, SwiftUI. Java is named in 4 of the 9 job postings O2 Slovakia published in the last 12 months (44%). Counted by Alion from the job postings of O2 Slovakia, updated Oct 12, 2026.
What programming languages does O2 Slovakia use?
Java is named in 44% of job postings at O2 Slovakia, followed by C# (22%), Kotlin (22%), SQL (22%).
C# 
What frameworks and libraries does O2 Slovakia use?
Jetpack Compose is named in 22% of job postings at O2 Slovakia, followed by SwiftUI (22%), Combine (11%), Kotlin Multiplatform (11%).
Jetpack Compose
2 22%
SwiftUI
2 22%
Combine
1 11%
Kotlin Multiplatform
1 11%
Playwright
1 11%
Selenium
1 11%
What cloud and platforms does O2 Slovakia use?
Power BI is named in 22% of job postings at O2 Slovakia.
Power BI
2 22%
What developer tools does O2 Slovakia use?
Rest API is named in 44% of job postings at O2 Slovakia, followed by Git (11%), Gradle (11%), Jenkins (11%).
What AI and ML technologies does O2 Slovakia use?
LLM is named in 11% of job postings at O2 Slovakia.
LLM
1 11%
Which engineering practices does O2 Slovakia ask for?
Dependency Injection is named in 22% of job postings at O2 Slovakia, followed by Clean Architecture (11%), MPLS (11%), NLP (11%).
Dependency Injection
2 22%
Clean Architecture
1 11%
NLP
1 11%
SLI/SLO/SLA
1 11%
What other technologies does O2 Slovakia use?
Kotlin Coroutines is named in 11% of job postings at O2 Slovakia.
Kotlin Coroutines
1 11%
How does your stack fit O2 Slovakia?
How is the O2 Slovakia stack changing?
Read from the dates of the postings themselves: a technology is new when the first posting that names it appeared in the last six months, rising or falling when its share of postings moved between the last two quarters.
How modern is the O2 Slovakia stack?
O2 Slovakia scores 77 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 1; legacy ones: 0.
Companies with a stack like O2 Slovakia
Questions about the O2 Slovakia tech stack
What programming languages does O2 Slovakia use?
The languages named in O2 Slovakia job postings are Java (44%), C# (22%), Kotlin (22%), SQL (22%), Swift (22%), as a share of the 9 postings of the last 12 months.
Does O2 Slovakia use Jetpack Compose?
Yes. Jetpack Compose is named in 2 of 9 job postings (22%) and required in 2 of them.
What cloud and platforms does O2 Slovakia use?
The cloud and platforms named in O2 Slovakia job postings are Power BI (2) (postings in brackets).
Is the O2 Slovakia tech stack changing?
Yes. Dependency Injection, Jetpack Compose, Kotlin, Swift first appeared in O2 Slovakia job postings in the last six months.
How modern is the O2 Slovakia tech stack?
O2 Slovakia scores 77 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 1; legacy ones: 0.
How does Alion know the O2 Slovakia tech stack?
Alion reads every job posting O2 Slovakia publishes and tags the technologies each one names. The figures on this page count the 9 postings of the last 12 months and were updated on Oct 12, 2026.
Method and citation
Alion reads every job posting the company publishes and tags the technologies each one names. Shares count the postings of the last 12 months, open and closed; the company's own products are counted apart. How we count
Alion, "O2 Slovakia tech stack: 29 technologies from 9 job postings", as of Oct 12, 2026. https://alion.io/company/o2-slovakia/technologies