S7 tech stack
S7 builds mostly with SQL, Java, Python, 1C. Its stack also includes Apache Kafka, PostgreSQL, Kubernetes, ClickHouse. Apache Kafka is named in 7 of the 10 job postings S7 published in the last 12 months (70%). Counted by Alion from the job postings of S7, updated Oct 14, 2026.
What programming languages does S7 use?
SQL is named in 50% of job postings at S7, followed by Java (30%), Python (30%), 1C (10%).
1C 
What frameworks and libraries does S7 use?
Dagster is named in 10% of job postings at S7, followed by FastAPI (10%), Flink (10%), Hibernate (10%).
Dagster
1 10%
FastAPI
1 10%
Flink
1 10%
Hibernate
1 10%
PyTorch
1 10%
SGLang
1 10%
Spring Boot
1 10%
Vue.js
1 10%
Show all (9)
What databases does S7 use?
PostgreSQL is named in 70% of job postings at S7, followed by ClickHouse (20%), Trino (20%), Vertica (20%).
What cloud and platforms does S7 use?
Apache Kafka is named in 70% of job postings at S7, followed by Kubernetes (30%), GitLab (30%), Airflow (10%).
Apache Kafka
7 70%
Kubernetes
3 30%
GitLab
3 30%
Airflow
1 10%
Postman
1 10%
Show all (16)
What developer tools does S7 use?
Rest API is named in 30% of job postings at S7, followed by Docker (30%), Git (10%), Insomnia (10%).
Rest API
3 30%
Docker
3 30%
Git
1 10%
Insomnia
1 10%
Model Context Protocol
1 10%
Open WebUI
1 10%
WebSockets
1 10%
llama.cpp
1 10%
Show all (11)
What AI and ML technologies does S7 use?
LLM is named in 10% of job postings at S7, followed by VLM (10%).
Which engineering practices does S7 ask for?
Machine Learning is named in 80% of job postings at S7, followed by SOAP (30%), CI/CD (10%), ETL/ELT (10%).
What does each S7 team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
3 postingsAnalytics
3 postingsHow does your stack fit S7?
How modern is the S7 stack?
S7 scores 80 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: 2; legacy ones: 0.
How common is the S7 stack in its industry?
Share of the 238 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like S7
Questions about the S7 tech stack
What programming languages does S7 use?
The languages named in S7 job postings are SQL (50%), Java (30%), Python (30%), 1C (10%), PHP (10%), as a share of the 10 postings of the last 12 months.
Does S7 use Apache Kafka?
Yes. Apache Kafka is named in 7 of 10 job postings (70%) and required in 7 of them.
What cloud and platforms does S7 use?
The cloud and platforms named in S7 job postings are Apache Kafka (7), Kubernetes (3), GitLab (3) (postings in brackets).
What skills do you need for a Backend job at S7?
Backend postings at S7 most often require Apache Kafka (3), Java (2), PostgreSQL (2), out of 3 postings in the last 12 months.
Is the S7 tech stack changing?
No new technology has appeared in S7 job postings in the last six months.
How modern is the S7 tech stack?
S7 scores 80 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: 2; legacy ones: 0.
How does Alion know the S7 tech stack?
Alion reads every job posting S7 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 14, 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, "S7 tech stack: 58 technologies from 10 job postings", as of Oct 14, 2026. https://alion.io/company/s7-3/technologies