A1 tech stack
A1 builds mostly with 1C, Python, SQL, ABAP. Its stack also includes Linux, SIEM, PostgreSQL, MS SQL. Linux is named in 4 of the 22 job postings A1 published in the last 12 months (18%). Counted by Alion from the job postings of A1, updated Nov 13, 2026.
What programming languages does A1 use?
1C is named in 14% of job postings at A1, followed by Python (9%), SQL (9%), ABAP (5%).
1C 
What frameworks and libraries does A1 use?
FastAPI is named in 5% of job postings at A1, followed by Flask (5%), Hibernate (5%), Pytest (5%).
What databases does A1 use?
PostgreSQL is named in 18% of job postings at A1, followed by MS SQL (9%), ElasticSearch (5%), MySQL (5%).
PostgreSQL
4 18%
MS SQL
2 9%
ElasticSearch
1 5%
MySQL
1 5%
OpenSearch
1 5%
Redis
1 5%
ClickHouse
1 5%
What cloud and platforms does A1 use?
Linux is named in 18% of job postings at A1, followed by SIEM (18%), GitHub Actions (14%), GitLab CI (14%).
GitHub Actions
3 14%
GitLab CI
3 14%
Power BI
3 14%
Figma
2 9%
Show all (21)
What developer tools does A1 use?
Rest API is named in 27% of job postings at A1, followed by Docker (18%), Git (18%), Jenkins (14%).
Rest API
6 27%
Docker
4 18%
Git
4 18%
Jenkins
3 14%
Prometheus
2 9%
Zabbix
2 9%
Ansible
2 9%
Adobe Illustrator
1 5%
Show all (26)
What AI and ML technologies does A1 use?
Midjourney is named in 5% of job postings at A1.
Midjourney
1 5%
Which engineering practices does A1 ask for?
CI/CD is named in 18% of job postings at A1, followed by DHCP (14%), DNS (14%), TCP/IP (14%).
Show all (14)
What does each A1 team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Enterprise Apps
4 postingsSecurity
3 postingsHow does your stack fit A1?
How modern is the A1 stack?
A1 scores 72 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: 1; legacy ones: 0.
How common is the A1 stack in its industry?
Share of the 534 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like A1
Questions about the A1 tech stack
What programming languages does A1 use?
The languages named in A1 job postings are 1C (14%), Python (9%), SQL (9%), ABAP (5%), Java (5%), as a share of the 22 postings of the last 12 months.
Does A1 use Linux?
Yes. Linux is named in 4 of 22 job postings (18%) and required in 4 of them.
What cloud and platforms does A1 use?
The cloud and platforms named in A1 job postings are Linux (4), SIEM (4), GitHub Actions (3) (postings in brackets).
What skills do you need for a Enterprise Apps job at A1?
Enterprise Apps postings at A1 most often require Rest API (3), 1C (2), out of 4 postings in the last 12 months.
Is the A1 tech stack changing?
No new technology has appeared in A1 job postings in the last six months.
How modern is the A1 tech stack?
A1 scores 72 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: 1; legacy ones: 0.
How does Alion know the A1 tech stack?
Alion reads every job posting A1 publishes and tags the technologies each one names. The figures on this page count the 22 postings of the last 12 months and were updated on Nov 13, 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, "A1 tech stack: 84 technologies from 22 job postings", as of Nov 13, 2026. https://alion.io/company/a1/technologies