21vek tech stack
21vek builds mostly with 1C, SQL, PHP, Python. Its stack also includes Airflow, Apache Kafka, ClickHouse, Flink. 1C is named in 7 of the 10 job postings 21vek published in the last 12 months (70%). Counted by Alion from the job postings of 21vek, updated Oct 12, 2026.
What programming languages does 21vek use?
1C is named in 70% of job postings at 21vek, followed by SQL (40%), PHP (20%), Python (10%).
1C 
What frameworks and libraries does 21vek use?
Flink is named in 20% of job postings at 21vek, followed by PyTorch (10%), TensorFlow (10%).
What databases does 21vek use?
ClickHouse is named in 20% of job postings at 21vek.
ClickHouse
2 20%
What cloud and platforms does 21vek use?
Airflow is named in 20% of job postings at 21vek, followed by Apache Kafka (20%), Spark (20%), Amazon S3 (20%).
What developer tools does 21vek use?
Bitrix is named in 20% of job postings at 21vek, followed by dbt (20%), Git (10%), Docker (10%).
Which engineering practices does 21vek ask for?
Data Vault is named in 20% of job postings at 21vek, followed by ETL/ELT (20%), Machine Learning (10%), NLP (10%).
How does your stack fit 21vek?
How modern is the 21vek stack?
21vek scores 76 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: 0; legacy ones: 0.
How common is the 21vek stack in its industry?
Share of the 1,499 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like 21vek
Questions about the 21vek tech stack
What programming languages does 21vek use?
The languages named in 21vek job postings are 1C (70%), SQL (40%), PHP (20%), Python (10%), as a share of the 10 postings of the last 12 months.
Does 21vek use Flink?
Yes. Flink is named in 2 of 10 job postings (20%) and required in 2 of them.
What cloud and platforms does 21vek use?
The cloud and platforms named in 21vek job postings are Airflow (2), Apache Kafka (2), Spark (2) (postings in brackets).
Is the 21vek tech stack changing?
No new technology has appeared in 21vek job postings in the last six months.
How modern is the 21vek tech stack?
21vek scores 76 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: 0; legacy ones: 0.
How does Alion know the 21vek tech stack?
Alion reads every job posting 21vek publishes and tags the technologies each one names. The figures on this page count the 10 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, "21vek tech stack: 23 technologies from 10 job postings", as of Oct 12, 2026. https://alion.io/company/21vek-by/technologies