A1 Bulgaria tech stack
A1 Bulgaria builds mostly with Python, SQL, JavaScript, Java. Its stack also includes Kubernetes, Azure, OpenTelemetry, MS SQL. Python is named in 17 of the 38 job postings A1 Bulgaria published in the last 12 months (45%). Counted by Alion from the job postings of A1 Bulgaria, updated Oct 12, 2026.
What programming languages does A1 Bulgaria use?
Python is named in 45% of job postings at A1 Bulgaria, followed by SQL (32%), JavaScript (18%), Java (11%).
Python
17 45%
SQL
12 32%
JavaScript
7 18%
Java
4 11%
TypeScript
4 11%
Bash
2 5%
Go
1 3%
Node JS
1 3%
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What frameworks and libraries does A1 Bulgaria use?
OpenTelemetry is named in 16% of job postings at A1 Bulgaria, followed by Playwright (8%), Angular (5%), Hadoop (5%).
OpenTelemetry
6 16%
Playwright
3 8%
Angular
2 5%
Hadoop
2 5%
NumPy
2 5%
Pandas
2 5%
Cypress
2 5%
Flink
2 5%
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What databases does A1 Bulgaria use?
MS SQL is named in 8% of job postings at A1 Bulgaria, followed by PostgreSQL (8%), MySQL (3%), Redis (3%).
MS SQL
3 8%
PostgreSQL
3 8%
MySQL
1 3%
Redis
1 3%
ClickHouse
1 3%
Delta Lake
1 3%
DuckDB
1 3%
Teradata
1 3%
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What cloud and platforms does A1 Bulgaria use?
Kubernetes is named in 34% of job postings at A1 Bulgaria, followed by Azure (32%), Grafana (21%), Spark (16%).
Kubernetes
13 34%
Azure
12 32%
Grafana
8 21%
Spark
6 16%
GitHub
5 13%
GitHub Actions
5 13%
Apache Kafka
5 13%
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What developer tools does A1 Bulgaria use?
Rest API is named in 21% of job postings at A1 Bulgaria, followed by Git (18%), Docker (16%), Prometheus (16%).
Rest API
8 21%
Git
7 18%
Docker
6 16%
Prometheus
6 16%
Jenkins
4 11%
Terraform
4 11%
Swagger
3 8%
Helm
2 5%
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What AI and ML technologies does A1 Bulgaria use?
LLM is named in 8% of job postings at A1 Bulgaria, followed by LoRA (3%), PEFT (3%), QLoRA (3%).
Which engineering practices does A1 Bulgaria ask for?
CI/CD is named in 37% of job postings at A1 Bulgaria, followed by RAG (13%), AI Agents (11%), GitOps (8%).
CI/CD
14 37%
RAG
5 13%
AI Agents
4 11%
GitOps
3 8%
Anomaly Detection
3 8%
Incident Management
3 8%
Show all (27)
What does each A1 Bulgaria team work with?
The technologies each team's postings require most often, with the number of postings that require them.
DevOps
10 postingsBackend
5 postingsData Science
4 postingsHow does your stack fit A1 Bulgaria?
How modern is the A1 Bulgaria stack?
A1 Bulgaria scores 83 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: 4; legacy ones: 0.
How common is the A1 Bulgaria stack in its industry?
Share of the 404 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like A1 Bulgaria
Questions about the A1 Bulgaria tech stack
What programming languages does A1 Bulgaria use?
The languages named in A1 Bulgaria job postings are Python (45%), SQL (32%), JavaScript (18%), Java (11%), TypeScript (11%), as a share of the 38 postings of the last 12 months.
Does A1 Bulgaria use OpenTelemetry?
Yes. OpenTelemetry is named in 6 of 38 job postings (16%) and required in 2 of them.
What cloud and platforms does A1 Bulgaria use?
The cloud and platforms named in A1 Bulgaria job postings are Kubernetes (13), Azure (12), Grafana (8) (postings in brackets).
What skills do you need for a DevOps job at A1 Bulgaria?
DevOps postings at A1 Bulgaria most often require Azure (7), Python (6), Kubernetes (5), GitHub Actions (2), out of 10 postings in the last 12 months.
Is the A1 Bulgaria tech stack changing?
No new technology has appeared in A1 Bulgaria job postings in the last six months.
How modern is the A1 Bulgaria tech stack?
A1 Bulgaria scores 83 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: 4; legacy ones: 0.
How does Alion know the A1 Bulgaria tech stack?
Alion reads every job posting A1 Bulgaria publishes and tags the technologies each one names. The figures on this page count the 38 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, "A1 Bulgaria tech stack: 150 technologies from 38 job postings", as of Oct 12, 2026. https://alion.io/company/a1-5/technologies