CLS tech stack
CLS builds mostly with SQL, Java, PHP, Scala. Its stack also includes Kubernetes, AWS, PostgreSQL, Redis. SQL is named in 2 of the 3 job postings CLS published in the last 12 months (67%). Counted by Alion from the job postings of CLS, updated Oct 17, 2026.
What programming languages does CLS use?
SQL is named in 67% of job postings at CLS, followed by Java (33%), PHP (33%), Scala (33%).
What frameworks and libraries does CLS use?
JUnit is named in 33% of job postings at CLS, followed by Mockito (33%).
What databases does CLS use?
PostgreSQL is named in 33% of job postings at CLS, followed by Redis (33%).
PostgreSQL
1 33%
Redis
1 33%
What cloud and platforms does CLS use?
Kubernetes is named in 67% of job postings at CLS, followed by AWS (33%), Apache Kafka (33%), Linux (33%).
What developer tools does CLS use?
Docker is named in 67% of job postings at CLS, followed by Git (33%), Helm (33%), Maven (33%).
Which engineering practices does CLS ask for?
ETL/ELT is named in 33% of job postings at CLS, followed by Machine Learning (33%), SLI/SLO/SLA (33%).
How does your stack fit CLS?
How modern is the CLS stack?
CLS scores 74 out of 100 (Modern). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 0; legacy ones: 0.
How common is the CLS stack in its industry?
Share of the 173 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like CLS
Home Credit Bank Kazakhstan
20 shared technologies
Golden Hire Consultancy
21 shared technologies
Sorigo
21 shared technologies
Verifone
20 shared technologies
Ipotekabank OTP Group
21 shared technologies
Light & Wonder
21 shared technologies
Qiagen
20 shared technologies
Labcorp
21 shared technologies
Questions about the CLS tech stack
What programming languages does CLS use?
The languages named in CLS job postings are SQL (67%), Java (33%), PHP (33%), Scala (33%), Kotlin (33%), as a share of the 3 postings of the last 12 months.
Does CLS use Kubernetes?
Yes. Kubernetes is named in 2 of 3 job postings (67%) and required in 2 of them.
What cloud and platforms does CLS use?
The cloud and platforms named in CLS job postings are Kubernetes (2), AWS (1), Apache Kafka (1) (postings in brackets).
Is the CLS tech stack changing?
No new technology has appeared in CLS job postings in the last six months.
How modern is the CLS tech stack?
CLS scores 74 out of 100 (Modern). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 0; legacy ones: 0.
How does Alion know the CLS tech stack?
Alion reads every job posting CLS publishes and tags the technologies each one names. The figures on this page count the 3 postings of the last 12 months and were updated on Oct 17, 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, "CLS tech stack: 23 technologies from 3 job postings", as of Oct 17, 2026. https://alion.io/company/cls-fr/technologies